Documentation/DocBook/media/dvb/dvbproperty.xml

   1 <section id="FE_GET_SET_PROPERTY">
   2 <title><constant>FE_GET_PROPERTY/FE_SET_PROPERTY</constant></title>
   3 <para>This section describes the DVB version 5 extension of the DVB-API, also
   4 called "S2API", as this API were added to provide support for DVB-S2. It was
   5 designed to be able to replace the old frontend API. Yet, the DISEQC and
   6 the capability ioctls weren't implemented yet via the new way.</para>
   7 <para>The typical usage for the <constant>FE_GET_PROPERTY/FE_SET_PROPERTY</constant>
   8 API is to replace the ioctl's were the <link linkend="dvb-frontend-parameters">
   9 struct <constant>dvb_frontend_parameters</constant></link> were used.</para>
  10 <section id="dtv-stats">
  11 <title>DTV stats type</title>
  12 <programlisting>
  13 struct dtv_stats {
  14         __u8 scale;     /* enum fecap_scale_params type */
  15         union {
  16                 __u64 uvalue;   /* for counters and relative scales */
  17                 __s64 svalue;   /* for 1/1000 dB measures */
  18         };
  19 } __packed;
  20 </programlisting>
  21 </section>
  22 <section id="dtv-fe-stats">
  23 <title>DTV stats type</title>
  24 <programlisting>
  25 #define MAX_DTV_STATS   4
  26
  27 struct dtv_fe_stats {
  28         __u8 len;
  29         struct dtv_stats stat[MAX_DTV_STATS];
  30 } __packed;
  31 </programlisting>
  32 </section>
  33
  34 <section id="dtv-property">
  35 <title>DTV property type</title>
  36 <programlisting>
  37 /* Reserved fields should be set to 0 */
  38
  39 struct dtv_property {
  40         __u32 cmd;
  41         __u32 reserved[3];
  42         union {
  43                 __u32 data;
  44                 struct dtv_fe_stats st;
  45                 struct {
  46                         __u8 data[32];
  47                         __u32 len;
  48                         __u32 reserved1[3];
  49                         void *reserved2;
  50                 } buffer;
  51         } u;
  52         int result;
  53 } __attribute__ ((packed));
  54
  55 /* num of properties cannot exceed DTV_IOCTL_MAX_MSGS per ioctl */
  56 #define DTV_IOCTL_MAX_MSGS 64
  57 </programlisting>
  58 </section>
  59 <section id="dtv-properties">
  60 <title>DTV properties type</title>
  61 <programlisting>
  62 struct dtv_properties {
  63         __u32 num;
  64         struct dtv_property *props;
  65 };
  66 </programlisting>
  67 </section>
  68
  69 <section id="FE_GET_PROPERTY">
  70 <title>FE_GET_PROPERTY</title>
  71 <para>DESCRIPTION
  72 </para>
  73 <informaltable><tgroup cols="1"><tbody><row><entry
  74  align="char">
  75 <para>This ioctl call returns one or more frontend properties. This call only
  76  requires read-only access to the device.</para>
  77 </entry>
  78  </row></tbody></tgroup></informaltable>
  79 <para>SYNOPSIS
  80 </para>
  81 <informaltable><tgroup cols="1"><tbody><row><entry
  82  align="char">
  83 <para>int ioctl(int fd, int request = <link linkend="FE_GET_PROPERTY">FE_GET_PROPERTY</link>,
  84  dtv_properties &#x22C6;props);</para>
  85 </entry>
  86  </row></tbody></tgroup></informaltable>
  87 <para>PARAMETERS
  88 </para>
  89 <informaltable><tgroup cols="2"><tbody><row><entry align="char">
  90 <para>int fd</para>
  91 </entry><entry
  92  align="char">
  93 <para>File descriptor returned by a previous call to open().</para>
  94 </entry>
  95  </row><row><entry
  96  align="char">
  97 <para>int num</para>
  98 </entry><entry
  99  align="char">
 100 <para>Equals <link linkend="FE_GET_PROPERTY">FE_GET_PROPERTY</link> for this command.</para>
 101 </entry>
 102  </row><row><entry
 103  align="char">
 104 <para>struct dtv_property *props</para>
 105 </entry><entry
 106  align="char">
 107 <para>Points to the location where the front-end property commands are stored.</para>
 108 </entry>
 109  </row></tbody></tgroup></informaltable>
 110 &return-value-dvb;
 111 <informaltable><tgroup cols="2"><tbody><row>
 112   <entry align="char"><para>EOPNOTSUPP</para></entry>
 113   <entry align="char"><para>Property type not supported.</para></entry>
 114  </row></tbody></tgroup></informaltable>
 115 </section>
 116
 117 <section id="FE_SET_PROPERTY">
 118 <title>FE_SET_PROPERTY</title>
 119 <para>DESCRIPTION
 120 </para>
 121 <informaltable><tgroup cols="1"><tbody><row><entry
 122  align="char">
 123 <para>This ioctl call sets one or more frontend properties. This call only
 124  requires read-only access to the device.</para>
 125 </entry>
 126  </row></tbody></tgroup></informaltable>
 127 <para>SYNOPSIS
 128 </para>
 129 <informaltable><tgroup cols="1"><tbody><row><entry
 130  align="char">
 131 <para>int ioctl(int fd, int request = <link linkend="FE_SET_PROPERTY">FE_SET_PROPERTY</link>,
 132  dtv_properties &#x22C6;props);</para>
 133 </entry>
 134  </row></tbody></tgroup></informaltable>
 135 <para>PARAMETERS
 136 </para>
 137 <informaltable><tgroup cols="2"><tbody><row><entry align="char">
 138 <para>int fd</para>
 139 </entry><entry
 140  align="char">
 141 <para>File descriptor returned by a previous call to open().</para>
 142 </entry>
 143  </row><row><entry
 144  align="char">
 145 <para>int num</para>
 146 </entry><entry
 147  align="char">
 148 <para>Equals <link linkend="FE_SET_PROPERTY">FE_SET_PROPERTY</link> for this command.</para>
 149 </entry>
 150  </row><row><entry
 151  align="char">
 152 <para>struct dtv_property *props</para>
 153 </entry><entry
 154  align="char">
 155 <para>Points to the location where the front-end property commands are stored.</para>
 156 </entry>
 157  </row></tbody></tgroup></informaltable>
 158 &return-value-dvb;
 159 <informaltable><tgroup cols="2"><tbody><row>
 160   <entry align="char"><para>EOPNOTSUPP</para></entry>
 161   <entry align="char"><para>Property type not supported.</para></entry>
 162  </row></tbody></tgroup></informaltable>
 163 </section>
 164
 165 <section>
 166         <title>Property types</title>
 167 <para>
 168 On <link linkend="FE_GET_PROPERTY">FE_GET_PROPERTY</link>/<link linkend="FE_SET_PROPERTY">FE_SET_PROPERTY</link>,
 169 the actual action is determined by the dtv_property cmd/data pairs. With one single ioctl, is possible to
 170 get/set up to 64 properties. The actual meaning of each property is described on the next sections.
 171 </para>
 172
 173 <para>The available frontend property types are shown on the next section.</para>
 174 </section>
 175
 176 <section id="fe_property_parameters">
 177         <title>Digital TV property parameters</title>
 178         <section id="DTV-UNDEFINED">
 179         <title><constant>DTV_UNDEFINED</constant></title>
 180         <para>Used internally. A GET/SET operation for it won't change or return anything.</para>
 181         </section>
 182         <section id="DTV-TUNE">
 183         <title><constant>DTV_TUNE</constant></title>
 184         <para>Interpret the cache of data, build either a traditional frontend tunerequest so we can pass validation in the <constant>FE_SET_FRONTEND</constant> ioctl.</para>
 185         </section>
 186         <section id="DTV-CLEAR">
 187         <title><constant>DTV_CLEAR</constant></title>
 188         <para>Reset a cache of data specific to the frontend here. This does not effect hardware.</para>
 189         </section>
 190         <section id="DTV-FREQUENCY">
 191                 <title><constant>DTV_FREQUENCY</constant></title>
 192
 193                 <para>Central frequency of the channel.</para>
 194
 195                 <para>Notes:</para>
 196                 <para>1)For satellital delivery systems, it is measured in kHz.
 197                         For the other ones, it is measured in Hz.</para>
 198                 <para>2)For ISDB-T, the channels are usually transmitted with an offset of 143kHz.
 199                         E.g. a valid frequency could be 474143 kHz. The stepping is bound to the bandwidth of
 200                         the channel which is 6MHz.</para>
 201
 202                 <para>3)As in ISDB-Tsb the channel consists of only one or three segments the
 203                         frequency step is 429kHz, 3*429 respectively. As for ISDB-T the
 204                         central frequency of the channel is expected.</para>
 205         </section>
 206         <section id="DTV-MODULATION">
 207         <title><constant>DTV_MODULATION</constant></title>
 208 <para>Specifies the frontend modulation type for cable and satellite types. The modulation can be one of the types bellow:</para>
 209 <programlisting>
 210  typedef enum fe_modulation {
 211         QPSK,
 212         QAM_16,
 213         QAM_32,
 214         QAM_64,
 215         QAM_128,
 216         QAM_256,
 217         QAM_AUTO,
 218         VSB_8,
 219         VSB_16,
 220         PSK_8,
 221         APSK_16,
 222         APSK_32,
 223         DQPSK,
 224         QAM_4_NR,
 225  } fe_modulation_t;
 226 </programlisting>
 227         </section>
 228         <section id="DTV-BANDWIDTH-HZ">
 229                 <title><constant>DTV_BANDWIDTH_HZ</constant></title>
 230
 231                 <para>Bandwidth for the channel, in HZ.</para>
 232
 233                 <para>Possible values:
 234                         <constant>1712000</constant>,
 235                         <constant>5000000</constant>,
 236                         <constant>6000000</constant>,
 237                         <constant>7000000</constant>,
 238                         <constant>8000000</constant>,
 239                         <constant>10000000</constant>.
 240                 </para>
 241
 242                 <para>Notes:</para>
 243
 244                 <para>1) For ISDB-T it should be always 6000000Hz (6MHz)</para>
 245                 <para>2) For ISDB-Tsb it can vary depending on the number of connected segments</para>
 246                 <para>3) Bandwidth doesn't apply for DVB-C transmissions, as the bandwidth
 247                          for DVB-C depends on the symbol rate</para>
 248                 <para>4) Bandwidth in ISDB-T is fixed (6MHz) or can be easily derived from
 249                         other parameters (DTV_ISDBT_SB_SEGMENT_IDX,
 250                         DTV_ISDBT_SB_SEGMENT_COUNT).</para>
 251                 <para>5) DVB-T supports 6, 7 and 8MHz.</para>
 252                 <para>6) In addition, DVB-T2 supports 1.172, 5 and 10MHz.</para>
 253         </section>
 254         <section id="DTV-INVERSION">
 255         <title><constant>DTV_INVERSION</constant></title>
 256         <para>The Inversion field can take one of these values:
 257         </para>
 258         <programlisting>
 259         typedef enum fe_spectral_inversion {
 260                 INVERSION_OFF,
 261                 INVERSION_ON,
 262                 INVERSION_AUTO
 263         } fe_spectral_inversion_t;
 264         </programlisting>
 265         <para>It indicates if spectral inversion should be presumed or not. In the automatic setting
 266         (<constant>INVERSION_AUTO</constant>) the hardware will try to figure out the correct setting by
 267         itself.
 268         </para>
 269         </section>
 270         <section id="DTV-DISEQC-MASTER">
 271         <title><constant>DTV_DISEQC_MASTER</constant></title>
 272         <para>Currently not implemented.</para>
 273         </section>
 274         <section id="DTV-SYMBOL-RATE">
 275         <title><constant>DTV_SYMBOL_RATE</constant></title>
 276         <para>Digital TV symbol rate, in bauds (symbols/second). Used on cable standards.</para>
 277         </section>
 278         <section id="DTV-INNER-FEC">
 279         <title><constant>DTV_INNER_FEC</constant></title>
 280         <para>Used cable/satellite transmissions. The acceptable values are:
 281         </para>
 282         <programlisting>
 283 typedef enum fe_code_rate {
 284         FEC_NONE = 0,
 285         FEC_1_2,
 286         FEC_2_3,
 287         FEC_3_4,
 288         FEC_4_5,
 289         FEC_5_6,
 290         FEC_6_7,
 291         FEC_7_8,
 292         FEC_8_9,
 293         FEC_AUTO,
 294         FEC_3_5,
 295         FEC_9_10,
 296         FEC_2_5,
 297 } fe_code_rate_t;
 298         </programlisting>
 299         <para>which correspond to error correction rates of 1/2, 2/3, etc.,
 300         no error correction or auto detection.</para>
 301         </section>
 302         <section id="DTV-VOLTAGE">
 303         <title><constant>DTV_VOLTAGE</constant></title>
 304         <para>The voltage is usually used with non-DiSEqC capable LNBs to switch
 305         the polarzation (horizontal/vertical). When using DiSEqC epuipment this
 306         voltage has to be switched consistently to the DiSEqC commands as
 307         described in the DiSEqC spec.</para>
 308         <programlisting>
 309                 typedef enum fe_sec_voltage {
 310                 SEC_VOLTAGE_13,
 311                 SEC_VOLTAGE_18
 312                 } fe_sec_voltage_t;
 313         </programlisting>
 314         </section>
 315         <section id="DTV-TONE">
 316         <title><constant>DTV_TONE</constant></title>
 317         <para>Currently not used.</para>
 318         </section>
 319         <section id="DTV-PILOT">
 320         <title><constant>DTV_PILOT</constant></title>
 321         <para>Sets DVB-S2 pilot</para>
 322         <section id="fe-pilot-t">
 323                 <title>fe_pilot type</title>
 324                 <programlisting>
 325 typedef enum fe_pilot {
 326         PILOT_ON,
 327         PILOT_OFF,
 328         PILOT_AUTO,
 329 } fe_pilot_t;
 330                 </programlisting>
 331                 </section>
 332         </section>
 333         <section id="DTV-ROLLOFF">
 334         <title><constant>DTV_ROLLOFF</constant></title>
 335                 <para>Sets DVB-S2 rolloff</para>
 336
 337         <section id="fe-rolloff-t">
 338                 <title>fe_rolloff type</title>
 339                 <programlisting>
 340 typedef enum fe_rolloff {
 341         ROLLOFF_35, /* Implied value in DVB-S, default for DVB-S2 */
 342         ROLLOFF_20,
 343         ROLLOFF_25,
 344         ROLLOFF_AUTO,
 345 } fe_rolloff_t;
 346                 </programlisting>
 347                 </section>
 348         </section>
 349         <section id="DTV-DISEQC-SLAVE-REPLY">
 350         <title><constant>DTV_DISEQC_SLAVE_REPLY</constant></title>
 351         <para>Currently not implemented.</para>
 352         </section>
 353         <section id="DTV-FE-CAPABILITY-COUNT">
 354         <title><constant>DTV_FE_CAPABILITY_COUNT</constant></title>
 355         <para>Currently not implemented.</para>
 356         </section>
 357         <section id="DTV-FE-CAPABILITY">
 358         <title><constant>DTV_FE_CAPABILITY</constant></title>
 359         <para>Currently not implemented.</para>
 360         </section>
 361         <section id="DTV-DELIVERY-SYSTEM">
 362                 <title><constant>DTV_DELIVERY_SYSTEM</constant></title>
 363                 <para>Specifies the type of Delivery system</para>
 364                 <section id="fe-delivery-system-t">
 365                 <title>fe_delivery_system type</title>
 366                 <para>Possible values: </para>
 367 <programlisting>
 368
 369 typedef enum fe_delivery_system {
 370         SYS_UNDEFINED,
 371         SYS_DVBC_ANNEX_A,
 372         SYS_DVBC_ANNEX_B,
 373         SYS_DVBT,
 374         SYS_DSS,
 375         SYS_DVBS,
 376         SYS_DVBS2,
 377         SYS_DVBH,
 378         SYS_ISDBT,
 379         SYS_ISDBS,
 380         SYS_ISDBC,
 381         SYS_ATSC,
 382         SYS_ATSCMH,
 383         SYS_DTMB,
 384         SYS_CMMB,
 385         SYS_DAB,
 386         SYS_DVBT2,
 387         SYS_TURBO,
 388         SYS_DVBC_ANNEX_C,
 389 } fe_delivery_system_t;
 390 </programlisting>
 391                 </section>
 392         </section>
 393         <section id="DTV-ISDBT-PARTIAL-RECEPTION">
 394                 <title><constant>DTV_ISDBT_PARTIAL_RECEPTION</constant></title>
 395
 396                 <para>If <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '0' this bit-field represents whether
 397                         the channel is in partial reception mode or not.</para>
 398
 399                 <para>If '1' <constant>DTV_ISDBT_LAYERA_*</constant> values are assigned to the center segment and
 400                         <constant>DTV_ISDBT_LAYERA_SEGMENT_COUNT</constant> has to be '1'.</para>
 401
 402                 <para>If in addition <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'
 403                         <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> represents whether this ISDB-Tsb channel
 404                         is consisting of one segment and layer or three segments and two layers.</para>
 405
 406                 <para>Possible values: 0, 1, -1 (AUTO)</para>
 407         </section>
 408         <section id="DTV-ISDBT-SOUND-BROADCASTING">
 409                 <title><constant>DTV_ISDBT_SOUND_BROADCASTING</constant></title>
 410
 411                 <para>This field represents whether the other DTV_ISDBT_*-parameters are
 412                         referring to an ISDB-T and an ISDB-Tsb channel. (See also
 413                         <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>).</para>
 414
 415                 <para>Possible values: 0, 1, -1 (AUTO)</para>
 416         </section>
 417         <section id="DTV-ISDBT-SB-SUBCHANNEL-ID">
 418                 <title><constant>DTV_ISDBT_SB_SUBCHANNEL_ID</constant></title>
 419
 420                 <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para>
 421
 422                 <para>(Note of the author: This might not be the correct description of the
 423                         <constant>SUBCHANNEL-ID</constant> in all details, but it is my understanding of the technical
 424                         background needed to program a device)</para>
 425
 426                 <para>An ISDB-Tsb channel (1 or 3 segments) can be broadcasted alone or in a
 427                         set of connected ISDB-Tsb channels. In this set of channels every
 428                         channel can be received independently. The number of connected
 429                         ISDB-Tsb segment can vary, e.g. depending on the frequency spectrum
 430                         bandwidth available.</para>
 431
 432                 <para>Example: Assume 8 ISDB-Tsb connected segments are broadcasted. The
 433                         broadcaster has several possibilities to put those channels in the
 434                         air: Assuming a normal 13-segment ISDB-T spectrum he can align the 8
 435                         segments from position 1-8 to 5-13 or anything in between.</para>
 436
 437                 <para>The underlying layer of segments are subchannels: each segment is
 438                         consisting of several subchannels with a predefined IDs. A sub-channel
 439                         is used to help the demodulator to synchronize on the channel.</para>
 440
 441                 <para>An ISDB-T channel is always centered over all sub-channels. As for
 442                         the example above, in ISDB-Tsb it is no longer as simple as that.</para>
 443
 444                 <para><constant>The DTV_ISDBT_SB_SUBCHANNEL_ID</constant> parameter is used to give the
 445                         sub-channel ID of the segment to be demodulated.</para>
 446
 447                 <para>Possible values: 0 .. 41, -1 (AUTO)</para>
 448         </section>
 449         <section id="DTV-ISDBT-SB-SEGMENT-IDX">
 450                 <title><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant></title>
 451                 <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para>
 452                 <para><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant> gives the index of the segment to be
 453                         demodulated for an ISDB-Tsb channel where several of them are
 454                         transmitted in the connected manner.</para>
 455                 <para>Possible values: 0 .. <constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant> - 1</para>
 456                 <para>Note: This value cannot be determined by an automatic channel search.</para>
 457         </section>
 458         <section id="DTV-ISDBT-SB-SEGMENT-COUNT">
 459                 <title><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant></title>
 460                 <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para>
 461                 <para><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant> gives the total count of connected ISDB-Tsb
 462                         channels.</para>
 463                 <para>Possible values: 1 .. 13</para>
 464                 <para>Note: This value cannot be determined by an automatic channel search.</para>
 465         </section>
 466         <section id="isdb-hierq-layers">
 467                 <title><constant>DTV-ISDBT-LAYER*</constant> parameters</title>
 468                 <para>ISDB-T channels can be coded hierarchically. As opposed to DVB-T in
 469                         ISDB-T hierarchical layers can be decoded simultaneously. For that
 470                         reason a ISDB-T demodulator has 3 Viterbi and 3 Reed-Solomon decoders.</para>
 471                 <para>ISDB-T has 3 hierarchical layers which each can use a part of the
 472                         available segments. The total number of segments over all layers has
 473                         to 13 in ISDB-T.</para>
 474                 <para>There are 3 parameter sets, for Layers A, B and C.</para>
 475                 <section id="DTV-ISDBT-LAYER-ENABLED">
 476                         <title><constant>DTV_ISDBT_LAYER_ENABLED</constant></title>
 477                         <para>Hierarchical reception in ISDB-T is achieved by enabling or disabling
 478                                 layers in the decoding process. Setting all bits of
 479                                 <constant>DTV_ISDBT_LAYER_ENABLED</constant> to '1' forces all layers (if applicable) to be
 480                                 demodulated. This is the default.</para>
 481                         <para>If the channel is in the partial reception mode
 482                                 (<constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> = 1) the central segment can be decoded
 483                                 independently of the other 12 segments. In that mode layer A has to
 484                                 have a <constant>SEGMENT_COUNT</constant> of 1.</para>
 485                         <para>In ISDB-Tsb only layer A is used, it can be 1 or 3 in ISDB-Tsb
 486                                 according to <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>. <constant>SEGMENT_COUNT</constant> must be filled
 487                                 accordingly.</para>
 488                         <para>Possible values: 0x1, 0x2, 0x4 (|-able)</para>
 489                         <para><constant>DTV_ISDBT_LAYER_ENABLED[0:0]</constant> - layer A</para>
 490                         <para><constant>DTV_ISDBT_LAYER_ENABLED[1:1]</constant> - layer B</para>
 491                         <para><constant>DTV_ISDBT_LAYER_ENABLED[2:2]</constant> - layer C</para>
 492                         <para><constant>DTV_ISDBT_LAYER_ENABLED[31:3]</constant> unused</para>
 493                 </section>
 494                 <section id="DTV-ISDBT-LAYER-FEC">
 495                         <title><constant>DTV_ISDBT_LAYER*_FEC</constant></title>
 496                         <para>Possible values: <constant>FEC_AUTO</constant>, <constant>FEC_1_2</constant>, <constant>FEC_2_3</constant>, <constant>FEC_3_4</constant>, <constant>FEC_5_6</constant>, <constant>FEC_7_8</constant></para>
 497                 </section>
 498                 <section id="DTV-ISDBT-LAYER-MODULATION">
 499                         <title><constant>DTV_ISDBT_LAYER*_MODULATION</constant></title>
 500                         <para>Possible values: <constant>QAM_AUTO</constant>, QP<constant>SK, QAM_16</constant>, <constant>QAM_64</constant>, <constant>DQPSK</constant></para>
 501                         <para>Note: If layer C is <constant>DQPSK</constant> layer B has to be <constant>DQPSK</constant>. If layer B is <constant>DQPSK</constant>
 502                                 and <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>=0 layer has to be <constant>DQPSK</constant>.</para>
 503                 </section>
 504                 <section id="DTV-ISDBT-LAYER-SEGMENT-COUNT">
 505                         <title><constant>DTV_ISDBT_LAYER*_SEGMENT_COUNT</constant></title>
 506                         <para>Possible values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, -1 (AUTO)</para>
 507                         <para>Note: Truth table for <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> and
 508                                 <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> and <constant>LAYER</constant>*_SEGMENT_COUNT</para>
 509                         <informaltable id="isdbt-layer_seg-cnt-table">
 510                                 <tgroup cols="6">
 511                                         <tbody>
 512                                                 <row>
 513                                                         <entry>PR</entry>
 514                                                         <entry>SB</entry>
 515                                                         <entry>Layer A width</entry>
 516                                                         <entry>Layer B width</entry>
 517                                                         <entry>Layer C width</entry>
 518                                                         <entry>total width</entry>
 519                                                 </row>
 520                                                 <row>
 521                                                         <entry>0</entry>
 522                                                         <entry>0</entry>
 523                                                         <entry>1 .. 13</entry>
 524                                                         <entry>1 .. 13</entry>
 525                                                         <entry>1 .. 13</entry>
 526                                                         <entry>13</entry>
 527                                                 </row>
 528                                                 <row>
 529                                                         <entry>1</entry>
 530                                                         <entry>0</entry>
 531                                                         <entry>1</entry>
 532                                                         <entry>1 .. 13</entry>
 533                                                         <entry>1 .. 13</entry>
 534                                                         <entry>13</entry>
 535                                                 </row>
 536                                                 <row>
 537                                                         <entry>0</entry>
 538                                                         <entry>1</entry>
 539                                                         <entry>1</entry>
 540                                                         <entry>0</entry>
 541                                                         <entry>0</entry>
 542                                                         <entry>1</entry>
 543                                                 </row>
 544                                                 <row>
 545                                                         <entry>1</entry>
 546                                                         <entry>1</entry>
 547                                                         <entry>1</entry>
 548                                                         <entry>2</entry>
 549                                                         <entry>0</entry>
 550                                                         <entry>13</entry>
 551                                                 </row>
 552                                         </tbody>
 553                                 </tgroup>
 554                         </informaltable>
 555                 </section>
 556                 <section id="DTV-ISDBT-LAYER-TIME-INTERLEAVING">
 557                         <title><constant>DTV_ISDBT_LAYER*_TIME_INTERLEAVING</constant></title>
 558                         <para>Valid values: 0, 1, 2, 4, -1 (AUTO)</para>
 559                         <para>when DTV_ISDBT_SOUND_BROADCASTING is active, value 8 is also valid.</para>
 560                         <para>Note: The real time interleaving length depends on the mode (fft-size). The values
 561                                 here are referring to what can be found in the TMCC-structure, as shown in the table below.</para>
 562                         <informaltable id="isdbt-layer-interleaving-table">
 563                                 <tgroup cols="4" align="center">
 564                                         <tbody>
 565                                                 <row>
 566                                                         <entry>DTV_ISDBT_LAYER*_TIME_INTERLEAVING</entry>
 567                                                         <entry>Mode 1 (2K FFT)</entry>
 568                                                         <entry>Mode 2 (4K FFT)</entry>
 569                                                         <entry>Mode 3 (8K FFT)</entry>
 570                                                 </row>
 571                                                 <row>
 572                                                         <entry>0</entry>
 573                                                         <entry>0</entry>
 574                                                         <entry>0</entry>
 575                                                         <entry>0</entry>
 576                                                 </row>
 577                                                 <row>
 578                                                         <entry>1</entry>
 579                                                         <entry>4</entry>
 580                                                         <entry>2</entry>
 581                                                         <entry>1</entry>
 582                                                 </row>
 583                                                 <row>
 584                                                         <entry>2</entry>
 585                                                         <entry>8</entry>
 586                                                         <entry>4</entry>
 587                                                         <entry>2</entry>
 588                                                 </row>
 589                                                 <row>
 590                                                         <entry>4</entry>
 591                                                         <entry>16</entry>
 592                                                         <entry>8</entry>
 593                                                         <entry>4</entry>
 594                                                 </row>
 595                                         </tbody>
 596                                 </tgroup>
 597                         </informaltable>
 598                 </section>
 599                 <section id="DTV-ATSCMH-FIC-VER">
 600                         <title><constant>DTV_ATSCMH_FIC_VER</constant></title>
 601                         <para>Version number of the FIC (Fast Information Channel) signaling data.</para>
 602                         <para>FIC is used for relaying information to allow rapid service acquisition by the receiver.</para>
 603                         <para>Possible values: 0, 1, 2, 3, ..., 30, 31</para>
 604                 </section>
 605                 <section id="DTV-ATSCMH-PARADE-ID">
 606                         <title><constant>DTV_ATSCMH_PARADE_ID</constant></title>
 607                         <para>Parade identification number</para>
 608                         <para>A parade is a collection of up to eight MH groups, conveying one or two ensembles.</para>
 609                         <para>Possible values: 0, 1, 2, 3, ..., 126, 127</para>
 610                 </section>
 611                 <section id="DTV-ATSCMH-NOG">
 612                         <title><constant>DTV_ATSCMH_NOG</constant></title>
 613                         <para>Number of MH groups per MH subframe for a designated parade.</para>
 614                         <para>Possible values: 1, 2, 3, 4, 5, 6, 7, 8</para>
 615                 </section>
 616                 <section id="DTV-ATSCMH-TNOG">
 617                         <title><constant>DTV_ATSCMH_TNOG</constant></title>
 618                         <para>Total number of MH groups including all MH groups belonging to all MH parades in one MH subframe.</para>
 619                         <para>Possible values: 0, 1, 2, 3, ..., 30, 31</para>
 620                 </section>
 621                 <section id="DTV-ATSCMH-SGN">
 622                         <title><constant>DTV_ATSCMH_SGN</constant></title>
 623                         <para>Start group number.</para>
 624                         <para>Possible values: 0, 1, 2, 3, ..., 14, 15</para>
 625                 </section>
 626                 <section id="DTV-ATSCMH-PRC">
 627                         <title><constant>DTV_ATSCMH_PRC</constant></title>
 628                         <para>Parade repetition cycle.</para>
 629                         <para>Possible values: 1, 2, 3, 4, 5, 6, 7, 8</para>
 630                 </section>
 631                 <section id="DTV-ATSCMH-RS-FRAME-MODE">
 632                         <title><constant>DTV_ATSCMH_RS_FRAME_MODE</constant></title>
 633                         <para>RS frame mode.</para>
 634                         <para>Possible values are:</para>
 635                   <para id="atscmh-rs-frame-mode">
 636 <programlisting>
 637 typedef enum atscmh_rs_frame_mode {
 638         ATSCMH_RSFRAME_PRI_ONLY  = 0,
 639         ATSCMH_RSFRAME_PRI_SEC   = 1,
 640 } atscmh_rs_frame_mode_t;
 641 </programlisting>
 642                   </para>
 643                 </section>
 644                 <section id="DTV-ATSCMH-RS-FRAME-ENSEMBLE">
 645                         <title><constant>DTV_ATSCMH_RS_FRAME_ENSEMBLE</constant></title>
 646                         <para>RS frame ensemble.</para>
 647                         <para>Possible values are:</para>
 648                   <para id="atscmh-rs-frame-ensemble">
 649 <programlisting>
 650 typedef enum atscmh_rs_frame_ensemble {
 651         ATSCMH_RSFRAME_ENS_PRI   = 0,
 652         ATSCMH_RSFRAME_ENS_SEC   = 1,
 653 } atscmh_rs_frame_ensemble_t;
 654 </programlisting>
 655                   </para>
 656                 </section>
 657                 <section id="DTV-ATSCMH-RS-CODE-MODE-PRI">
 658                         <title><constant>DTV_ATSCMH_RS_CODE_MODE_PRI</constant></title>
 659                         <para>RS code mode (primary).</para>
 660                         <para>Possible values are:</para>
 661                   <para id="atscmh-rs-code-mode">
 662 <programlisting>
 663 typedef enum atscmh_rs_code_mode {
 664         ATSCMH_RSCODE_211_187    = 0,
 665         ATSCMH_RSCODE_223_187    = 1,
 666         ATSCMH_RSCODE_235_187    = 2,
 667 } atscmh_rs_code_mode_t;
 668 </programlisting>
 669                   </para>
 670                 </section>
 671                 <section id="DTV-ATSCMH-RS-CODE-MODE-SEC">
 672                         <title><constant>DTV_ATSCMH_RS_CODE_MODE_SEC</constant></title>
 673                         <para>RS code mode (secondary).</para>
 674                         <para>Possible values are:</para>
 675 <programlisting>
 676 typedef enum atscmh_rs_code_mode {
 677         ATSCMH_RSCODE_211_187    = 0,
 678         ATSCMH_RSCODE_223_187    = 1,
 679         ATSCMH_RSCODE_235_187    = 2,
 680 } atscmh_rs_code_mode_t;
 681 </programlisting>
 682                 </section>
 683                 <section id="DTV-ATSCMH-SCCC-BLOCK-MODE">
 684                         <title><constant>DTV_ATSCMH_SCCC_BLOCK_MODE</constant></title>
 685                         <para>Series Concatenated Convolutional Code Block Mode.</para>
 686                         <para>Possible values are:</para>
 687                   <para id="atscmh-sccc-block-mode">
 688 <programlisting>
 689 typedef enum atscmh_sccc_block_mode {
 690         ATSCMH_SCCC_BLK_SEP      = 0,
 691         ATSCMH_SCCC_BLK_COMB     = 1,
 692 } atscmh_sccc_block_mode_t;
 693 </programlisting>
 694                   </para>
 695                 </section>
 696                 <section id="DTV-ATSCMH-SCCC-CODE-MODE-A">
 697                         <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_A</constant></title>
 698                         <para>Series Concatenated Convolutional Code Rate.</para>
 699                         <para>Possible values are:</para>
 700                   <para id="atscmh-sccc-code-mode">
 701 <programlisting>
 702 typedef enum atscmh_sccc_code_mode {
 703         ATSCMH_SCCC_CODE_HLF     = 0,
 704         ATSCMH_SCCC_CODE_QTR     = 1,
 705 } atscmh_sccc_code_mode_t;
 706 </programlisting>
 707                   </para>
 708                 </section>
 709                 <section id="DTV-ATSCMH-SCCC-CODE-MODE-B">
 710                         <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_B</constant></title>
 711                         <para>Series Concatenated Convolutional Code Rate.</para>
 712                         <para>Possible values are:</para>
 713 <programlisting>
 714 typedef enum atscmh_sccc_code_mode {
 715         ATSCMH_SCCC_CODE_HLF     = 0,
 716         ATSCMH_SCCC_CODE_QTR     = 1,
 717 } atscmh_sccc_code_mode_t;
 718 </programlisting>
 719                 </section>
 720                 <section id="DTV-ATSCMH-SCCC-CODE-MODE-C">
 721                         <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_C</constant></title>
 722                         <para>Series Concatenated Convolutional Code Rate.</para>
 723                         <para>Possible values are:</para>
 724 <programlisting>
 725 typedef enum atscmh_sccc_code_mode {
 726         ATSCMH_SCCC_CODE_HLF     = 0,
 727         ATSCMH_SCCC_CODE_QTR     = 1,
 728 } atscmh_sccc_code_mode_t;
 729 </programlisting>
 730                 </section>
 731                 <section id="DTV-ATSCMH-SCCC-CODE-MODE-D">
 732                         <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_D</constant></title>
 733                         <para>Series Concatenated Convolutional Code Rate.</para>
 734                         <para>Possible values are:</para>
 735 <programlisting>
 736 typedef enum atscmh_sccc_code_mode {
 737         ATSCMH_SCCC_CODE_HLF     = 0,
 738         ATSCMH_SCCC_CODE_QTR     = 1,
 739 } atscmh_sccc_code_mode_t;
 740 </programlisting>
 741                 </section>
 742         </section>
 743         <section id="DTV-API-VERSION">
 744         <title><constant>DTV_API_VERSION</constant></title>
 745         <para>Returns the major/minor version of the DVB API</para>
 746         </section>
 747         <section id="DTV-CODE-RATE-HP">
 748         <title><constant>DTV_CODE_RATE_HP</constant></title>
 749         <para>Used on terrestrial transmissions. The acceptable values are:
 750         </para>
 751         <programlisting>
 752 typedef enum fe_code_rate {
 753         FEC_NONE = 0,
 754         FEC_1_2,
 755         FEC_2_3,
 756         FEC_3_4,
 757         FEC_4_5,
 758         FEC_5_6,
 759         FEC_6_7,
 760         FEC_7_8,
 761         FEC_8_9,
 762         FEC_AUTO,
 763         FEC_3_5,
 764         FEC_9_10,
 765 } fe_code_rate_t;
 766         </programlisting>
 767         </section>
 768         <section id="DTV-CODE-RATE-LP">
 769         <title><constant>DTV_CODE_RATE_LP</constant></title>
 770         <para>Used on terrestrial transmissions. The acceptable values are:
 771         </para>
 772         <programlisting>
 773 typedef enum fe_code_rate {
 774         FEC_NONE = 0,
 775         FEC_1_2,
 776         FEC_2_3,
 777         FEC_3_4,
 778         FEC_4_5,
 779         FEC_5_6,
 780         FEC_6_7,
 781         FEC_7_8,
 782         FEC_8_9,
 783         FEC_AUTO,
 784         FEC_3_5,
 785         FEC_9_10,
 786 } fe_code_rate_t;
 787         </programlisting>
 788         </section>
 789         <section id="DTV-GUARD-INTERVAL">
 790                 <title><constant>DTV_GUARD_INTERVAL</constant></title>
 791
 792                 <para>Possible values are:</para>
 793 <programlisting>
 794 typedef enum fe_guard_interval {
 795         GUARD_INTERVAL_1_32,
 796         GUARD_INTERVAL_1_16,
 797         GUARD_INTERVAL_1_8,
 798         GUARD_INTERVAL_1_4,
 799         GUARD_INTERVAL_AUTO,
 800         GUARD_INTERVAL_1_128,
 801         GUARD_INTERVAL_19_128,
 802         GUARD_INTERVAL_19_256,
 803         GUARD_INTERVAL_PN420,
 804         GUARD_INTERVAL_PN595,
 805         GUARD_INTERVAL_PN945,
 806 } fe_guard_interval_t;
 807 </programlisting>
 808
 809                 <para>Notes:</para>
 810                 <para>1) If <constant>DTV_GUARD_INTERVAL</constant> is set the <constant>GUARD_INTERVAL_AUTO</constant> the hardware will
 811                         try to find the correct guard interval (if capable) and will use TMCC to fill
 812                         in the missing parameters.</para>
 813                 <para>2) Intervals 1/128, 19/128 and 19/256 are used only for DVB-T2 at present</para>
 814                 <para>3) DTMB specifies PN420, PN595 and PN945.</para>
 815         </section>
 816         <section id="DTV-TRANSMISSION-MODE">
 817                 <title><constant>DTV_TRANSMISSION_MODE</constant></title>
 818
 819                 <para>Specifies the number of carriers used by the standard</para>
 820
 821                 <para>Possible values are:</para>
 822 <programlisting>
 823 typedef enum fe_transmit_mode {
 824         TRANSMISSION_MODE_2K,
 825         TRANSMISSION_MODE_8K,
 826         TRANSMISSION_MODE_AUTO,
 827         TRANSMISSION_MODE_4K,
 828         TRANSMISSION_MODE_1K,
 829         TRANSMISSION_MODE_16K,
 830         TRANSMISSION_MODE_32K,
 831         TRANSMISSION_MODE_C1,
 832         TRANSMISSION_MODE_C3780,
 833 } fe_transmit_mode_t;
 834 </programlisting>
 835                 <para>Notes:</para>
 836                 <para>1) ISDB-T supports three carrier/symbol-size: 8K, 4K, 2K. It is called
 837                         'mode' in the standard: Mode 1 is 2K, mode 2 is 4K, mode 3 is 8K</para>
 838
 839                 <para>2) If <constant>DTV_TRANSMISSION_MODE</constant> is set the <constant>TRANSMISSION_MODE_AUTO</constant> the
 840                         hardware will try to find the correct FFT-size (if capable) and will
 841                         use TMCC to fill in the missing parameters.</para>
 842                 <para>3) DVB-T specifies 2K and 8K as valid sizes.</para>
 843                 <para>4) DVB-T2 specifies 1K, 2K, 4K, 8K, 16K and 32K.</para>
 844                 <para>5) DTMB specifies C1 and C3780.</para>
 845         </section>
 846         <section id="DTV-HIERARCHY">
 847         <title><constant>DTV_HIERARCHY</constant></title>
 848         <para>Frontend hierarchy</para>
 849         <programlisting>
 850 typedef enum fe_hierarchy {
 851          HIERARCHY_NONE,
 852          HIERARCHY_1,
 853          HIERARCHY_2,
 854          HIERARCHY_4,
 855          HIERARCHY_AUTO
 856  } fe_hierarchy_t;
 857         </programlisting>
 858         </section>
 859         <section id="DTV-STREAM-ID">
 860         <title><constant>DTV_STREAM_ID</constant></title>
 861         <para>DVB-S2, DVB-T2 and ISDB-S support the transmission of several
 862               streams on a single transport stream.
 863               This property enables the DVB driver to handle substream filtering,
 864               when supported by the hardware.
 865               By default, substream filtering is disabled.
 866         </para><para>
 867               For DVB-S2 and DVB-T2, the valid substream id range is from 0 to 255.
 868         </para><para>
 869               For ISDB, the valid substream id range is from 1 to 65535.
 870         </para><para>
 871               To disable it, you should use the special macro NO_STREAM_ID_FILTER.
 872         </para><para>
 873               Note: any value outside the id range also disables filtering.
 874         </para>
 875         </section>
 876         <section id="DTV-DVBT2-PLP-ID-LEGACY">
 877                 <title><constant>DTV_DVBT2_PLP_ID_LEGACY</constant></title>
 878                 <para>Obsolete, replaced with DTV_STREAM_ID.</para>
 879         </section>
 880         <section id="DTV-ENUM-DELSYS">
 881                 <title><constant>DTV_ENUM_DELSYS</constant></title>
 882                 <para>A Multi standard frontend needs to advertise the delivery systems provided.
 883                         Applications need to enumerate the provided delivery systems, before using
 884                         any other operation with the frontend. Prior to it's introduction,
 885                         FE_GET_INFO was used to determine a frontend type. A frontend which
 886                         provides more than a single delivery system, FE_GET_INFO doesn't help much.
 887                         Applications which intends to use a multistandard frontend must enumerate
 888                         the delivery systems associated with it, rather than trying to use
 889                         FE_GET_INFO. In the case of a legacy frontend, the result is just the same
 890                         as with FE_GET_INFO, but in a more structured format </para>
 891         </section>
 892         <section id="DTV-INTERLEAVING">
 893         <title><constant>DTV_INTERLEAVING</constant></title>
 894         <para id="fe-interleaving">Interleaving mode</para>
 895         <programlisting>
 896 enum fe_interleaving {
 897         INTERLEAVING_NONE,
 898         INTERLEAVING_AUTO,
 899         INTERLEAVING_240,
 900         INTERLEAVING_720,
 901 };
 902         </programlisting>
 903         </section>
 904         <section id="DTV-LNA">
 905         <title><constant>DTV_LNA</constant></title>
 906         <para>Low-noise amplifier.</para>
 907         <para>Hardware might offer controllable LNA which can be set manually
 908                 using that parameter. Usually LNA could be found only from
 909                 terrestrial devices if at all.</para>
 910         <para>Possible values: 0, 1, LNA_AUTO</para>
 911         <para>0, LNA off</para>
 912         <para>1, LNA on</para>
 913         <para>use the special macro LNA_AUTO to set LNA auto</para>
 914         </section>
 915 </section>
 916
 917         <section id="frontend-stat-properties">
 918         <title>Frontend statistics indicators</title>
 919         <para>The values are returned via <constant>dtv_property.stat</constant>.
 920               If the property is supported, <constant>dtv_property.stat.len</constant> is bigger than zero.</para>
 921         <para>For most delivery systems, <constant>dtv_property.stat.len</constant>
 922               will be 1 if the stats is supported, and the properties will
 923               return a single value for each parameter.</para>
 924         <para>It should be noticed, however, that new OFDM delivery systems
 925               like ISDB can use different modulation types for each group of
 926               carriers. On such standards, up to 3 groups of statistics can be
 927               provided, and <constant>dtv_property.stat.len</constant> is updated
 928               to reflect the "global" metrics, plus one metric per each carrier
 929               group (called "layer" on ISDB).</para>
 930         <para>So, in order to be consistent with other delivery systems, the first
 931               value at <link linkend="dtv-stats"><constant>dtv_property.stat.dtv_stats</constant></link>
 932               array refers to the global metric. The other elements of the array
 933               represent each layer, starting from layer A(index 1),
 934               layer B (index 2) and so on.</para>
 935         <para>The number of filled elements are stored at <constant>dtv_property.stat.len</constant>.</para>
 936         <para>Each element of the <constant>dtv_property.stat.dtv_stats</constant> array consists on two elements:</para>
 937         <itemizedlist mark='opencircle'>
 938                 <listitem><para><constant>svalue</constant> or <constant>uvalue</constant>, where
 939                         <constant>svalue</constant> is for signed values of the measure (dB measures)
 940                         and <constant>uvalue</constant> is for unsigned values (counters, relative scale)</para></listitem>
 941                 <listitem><para><constant>scale</constant> - Scale for the value. It can be:</para>
 942                         <itemizedlist mark='bullet' id="fecap-scale-params">
 943                                 <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - The parameter is supported by the frontend, but it was not possible to collect it (could be a transitory or permanent condition)</para></listitem>
 944                                 <listitem><para><constant>FE_SCALE_DECIBEL</constant> - parameter is a signed value, measured in 1/1000 dB</para></listitem>
 945                                 <listitem><para><constant>FE_SCALE_RELATIVE</constant> - parameter is a unsigned value, where 0 means 0% and 65535 means 100%.</para></listitem>
 946                                 <listitem><para><constant>FE_SCALE_COUNTER</constant> - parameter is a unsigned value that counts the occurrence of an event, like bit error, block error, or lapsed time.</para></listitem>
 947                         </itemizedlist>
 948                 </listitem>
 949         </itemizedlist>
 950         <section id="DTV-STAT-SIGNAL-STRENGTH">
 951                 <title><constant>DTV_STAT_SIGNAL_STRENGTH</constant></title>
 952                 <para>Indicates the signal strength level at the analog part of the tuner or of the demod.</para>
 953                 <para>Possible scales for this metric are:</para>
 954                 <itemizedlist mark='bullet'>
 955                         <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem>
 956                         <listitem><para><constant>FE_SCALE_DECIBEL</constant> - signal strength is in 0.0001 dBm units, power measured in miliwatts. This value is generally negative.</para></listitem>
 957                         <listitem><para><constant>FE_SCALE_RELATIVE</constant> - The frontend provides a 0% to 100% measurement for power (actually, 0 to 65535).</para></listitem>
 958                 </itemizedlist>
 959         </section>
 960         <section id="DTV-STAT-CNR">
 961                 <title><constant>DTV_STAT_CNR</constant></title>
 962                 <para>Indicates the Signal to Noise ratio for the main carrier.</para>
 963                 <para>Possible scales for this metric are:</para>
 964                 <itemizedlist mark='bullet'>
 965                         <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem>
 966                         <listitem><para><constant>FE_SCALE_DECIBEL</constant> - Signal/Noise ratio is in 0.0001 dB units.</para></listitem>
 967                         <listitem><para><constant>FE_SCALE_RELATIVE</constant> - The frontend provides a 0% to 100% measurement for Signal/Noise (actually, 0 to 65535).</para></listitem>
 968                 </itemizedlist>
 969         </section>
 970         <section id="DTV-STAT-PRE-ERROR-BIT-COUNT">
 971                 <title><constant>DTV_STAT_PRE_ERROR_BIT_COUNT</constant></title>
 972                 <para>Measures the number of bit errors before the forward error correction (FEC) on the inner coding block (before Viterbi, LDPC or other inner code).</para>
 973                 <para>This measure is taken during the same interval as <constant>DTV_STAT_PRE_TOTAL_BIT_COUNT</constant>.</para>
 974                 <para>In order to get the BER (Bit Error Rate) measurement, it should be divided by
 975                 <link linkend="DTV-STAT-PRE-TOTAL-BIT-COUNT"><constant>DTV_STAT_PRE_TOTAL_BIT_COUNT</constant></link>.</para>
 976                 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements.
 977                       The frontend may reset it when a channel/transponder is tuned.</para>
 978                 <para>Possible scales for this metric are:</para>
 979                 <itemizedlist mark='bullet'>
 980                         <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem>
 981                         <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of error bits counted before the inner coding.</para></listitem>
 982                 </itemizedlist>
 983         </section>
 984         <section id="DTV-STAT-PRE-TOTAL-BIT-COUNT">
 985                 <title><constant>DTV_STAT_PRE_TOTAL_BIT_COUNT</constant></title>
 986                 <para>Measures the amount of bits received before the inner code block, during the same period as
 987                 <link linkend="DTV-STAT-PRE-ERROR-BIT-COUNT"><constant>DTV_STAT_PRE_ERROR_BIT_COUNT</constant></link> measurement was taken.</para>
 988                 <para>It should be noticed that this measurement can be smaller than the total amount of bits on the transport stream,
 989                       as the frontend may need to manually restart the measurement, losing some data between each measurement interval.</para>
 990                 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements.
 991                       The frontend may reset it when a channel/transponder is tuned.</para>
 992                 <para>Possible scales for this metric are:</para>
 993                 <itemizedlist mark='bullet'>
 994                         <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem>
 995                         <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of bits counted while measuring
 996                                  <link linkend="DTV-STAT-PRE-ERROR-BIT-COUNT"><constant>DTV_STAT_PRE_ERROR_BIT_COUNT</constant></link>.</para></listitem>
 997                 </itemizedlist>
 998         </section>
 999         <section id="DTV-STAT-POST-ERROR-BIT-COUNT">
1000                 <title><constant>DTV_STAT_POST_ERROR_BIT_COUNT</constant></title>
1001                 <para>Measures the number of bit errors after the forward error correction (FEC) done by inner code block (after Viterbi, LDPC or other inner code).</para>
1002                 <para>This measure is taken during the same interval as <constant>DTV_STAT_POST_TOTAL_BIT_COUNT</constant>.</para>
1003                 <para>In order to get the BER (Bit Error Rate) measurement, it should be divided by
1004                 <link linkend="DTV-STAT-POST-TOTAL-BIT-COUNT"><constant>DTV_STAT_POST_TOTAL_BIT_COUNT</constant></link>.</para>
1005                 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements.
1006                       The frontend may reset it when a channel/transponder is tuned.</para>
1007                 <para>Possible scales for this metric are:</para>
1008                 <itemizedlist mark='bullet'>
1009                         <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem>
1010                         <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of error bits counted after the inner coding.</para></listitem>
1011                 </itemizedlist>
1012         </section>
1013         <section id="DTV-STAT-POST-TOTAL-BIT-COUNT">
1014                 <title><constant>DTV_STAT_POST_TOTAL_BIT_COUNT</constant></title>
1015                 <para>Measures the amount of bits received after the inner coding, during the same period as
1016                 <link linkend="DTV-STAT-POST-ERROR-BIT-COUNT"><constant>DTV_STAT_POST_ERROR_BIT_COUNT</constant></link> measurement was taken.</para>
1017                 <para>It should be noticed that this measurement can be smaller than the total amount of bits on the transport stream,
1018                       as the frontend may need to manually restart the measurement, losing some data between each measurement interval.</para>
1019                 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements.
1020                       The frontend may reset it when a channel/transponder is tuned.</para>
1021                 <para>Possible scales for this metric are:</para>
1022                 <itemizedlist mark='bullet'>
1023                         <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem>
1024                         <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of bits counted while measuring
1025                                  <link linkend="DTV-STAT-POST-ERROR-BIT-COUNT"><constant>DTV_STAT_POST_ERROR_BIT_COUNT</constant></link>.</para></listitem>
1026                 </itemizedlist>
1027         </section>
1028         <section id="DTV-STAT-ERROR-BLOCK-COUNT">
1029                 <title><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></title>
1030                 <para>Measures the number of block errors after the outer forward error correction coding (after Reed-Solomon or other outer code).</para>
1031                 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements.
1032                       The frontend may reset it when a channel/transponder is tuned.</para>
1033                 <para>Possible scales for this metric are:</para>
1034                 <itemizedlist mark='bullet'>
1035                         <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem>
1036                         <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of error blocks counted after the outer coding.</para></listitem>
1037                 </itemizedlist>
1038         </section>
1039         <section id="DTV-STAT-TOTAL-BLOCK-COUNT">
1040                 <title><constant>DTV-STAT_TOTAL_BLOCK_COUNT</constant></title>
1041                 <para>Measures the total number of blocks received during the same period as
1042                 <link linkend="DTV-STAT-ERROR-BLOCK-COUNT"><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></link> measurement was taken.</para>
1043                 <para>It can be used to calculate the PER indicator, by dividing
1044                 <link linkend="DTV-STAT-ERROR-BLOCK-COUNT"><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></link>
1045                 by <link linkend="DTV-STAT-TOTAL-BLOCK-COUNT"><constant>DTV-STAT-TOTAL-BLOCK-COUNT</constant></link>.</para>
1046                 <para>Possible scales for this metric are:</para>
1047                 <itemizedlist mark='bullet'>
1048                         <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem>
1049                         <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of blocks counted while measuring
1050                         <link linkend="DTV-STAT-ERROR-BLOCK-COUNT"><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></link>.</para></listitem>
1051                 </itemizedlist>
1052         </section>
1053         </section>
1054
1055         <section id="frontend-property-terrestrial-systems">
1056         <title>Properties used on terrestrial delivery systems</title>
1057                 <section id="dvbt-params">
1058                         <title>DVB-T delivery system</title>
1059                         <para>The following parameters are valid for DVB-T:</para>
1060                         <itemizedlist mark='opencircle'>
1061                                 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
1062                                 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
1063                                 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
1064                                 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
1065                                 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
1066                                 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
1067                                 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem>
1068                                 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
1069                                 <listitem><para><link linkend="DTV-CODE-RATE-HP"><constant>DTV_CODE_RATE_HP</constant></link></para></listitem>
1070                                 <listitem><para><link linkend="DTV-CODE-RATE-LP"><constant>DTV_CODE_RATE_LP</constant></link></para></listitem>
1071                                 <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem>
1072                                 <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem>
1073                                 <listitem><para><link linkend="DTV-HIERARCHY"><constant>DTV_HIERARCHY</constant></link></para></listitem>
1074                                 <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem>
1075                         </itemizedlist>
1076                         <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1077                 </section>
1078                 <section id="dvbt2-params">
1079                         <title>DVB-T2 delivery system</title>
1080                         <para>DVB-T2 support is currently in the early stages
1081                         of development, so expect that this section maygrow and become
1082                         more detailed with time.</para>
1083                 <para>The following parameters are valid for DVB-T2:</para>
1084                 <itemizedlist mark='opencircle'>
1085                         <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
1086                         <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
1087                         <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
1088                         <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
1089                         <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
1090                         <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
1091                         <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem>
1092                         <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
1093                         <listitem><para><link linkend="DTV-CODE-RATE-HP"><constant>DTV_CODE_RATE_HP</constant></link></para></listitem>
1094                         <listitem><para><link linkend="DTV-CODE-RATE-LP"><constant>DTV_CODE_RATE_LP</constant></link></para></listitem>
1095                         <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem>
1096                         <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem>
1097                         <listitem><para><link linkend="DTV-HIERARCHY"><constant>DTV_HIERARCHY</constant></link></para></listitem>
1098                         <listitem><para><link linkend="DTV-STREAM-ID"><constant>DTV_STREAM_ID</constant></link></para></listitem>
1099                         <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem>
1100                 </itemizedlist>
1101                 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1102                 </section>
1103                 <section id="isdbt">
1104                 <title>ISDB-T delivery system</title>
1105                 <para>This ISDB-T/ISDB-Tsb API extension should reflect all information
1106                         needed to tune any ISDB-T/ISDB-Tsb hardware. Of course it is possible
1107                         that some very sophisticated devices won't need certain parameters to
1108                         tune.</para>
1109                 <para>The information given here should help application writers to know how
1110                         to handle ISDB-T and ISDB-Tsb hardware using the Linux DVB-API.</para>
1111                 <para>The details given here about ISDB-T and ISDB-Tsb are just enough to
1112                         basically show the dependencies between the needed parameter values,
1113                         but surely some information is left out. For more detailed information
1114                         see the following documents:</para>
1115                 <para>ARIB STD-B31 - "Transmission System for Digital Terrestrial
1116                         Television Broadcasting" and</para>
1117                 <para>ARIB TR-B14 - "Operational Guidelines for Digital Terrestrial
1118                         Television Broadcasting".</para>
1119                 <para>In order to understand the ISDB specific parameters,
1120                         one has to have some knowledge the channel structure in
1121                         ISDB-T and ISDB-Tsb. I.e. it has to be known to
1122                         the reader that an ISDB-T channel consists of 13 segments,
1123                         that it can have up to 3 layer sharing those segments,
1124                         and things like that.</para>
1125                 <para>The following parameters are valid for ISDB-T:</para>
1126                 <itemizedlist mark='opencircle'>
1127                         <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
1128                         <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
1129                         <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
1130                         <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
1131                         <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
1132                         <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem>
1133                         <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
1134                         <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem>
1135                         <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem>
1136                         <listitem><para><link linkend="DTV-ISDBT-LAYER-ENABLED"><constant>DTV_ISDBT_LAYER_ENABLED</constant></link></para></listitem>
1137                         <listitem><para><link linkend="DTV-ISDBT-PARTIAL-RECEPTION"><constant>DTV_ISDBT_PARTIAL_RECEPTION</constant></link></para></listitem>
1138                         <listitem><para><link linkend="DTV-ISDBT-SOUND-BROADCASTING"><constant>DTV_ISDBT_SOUND_BROADCASTING</constant></link></para></listitem>
1139                         <listitem><para><link linkend="DTV-ISDBT-SB-SUBCHANNEL-ID"><constant>DTV_ISDBT_SB_SUBCHANNEL_ID</constant></link></para></listitem>
1140                         <listitem><para><link linkend="DTV-ISDBT-SB-SEGMENT-IDX"><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant></link></para></listitem>
1141                         <listitem><para><link linkend="DTV-ISDBT-SB-SEGMENT-COUNT"><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant></link></para></listitem>
1142                         <listitem><para><link linkend="DTV-ISDBT-LAYER-FEC"><constant>DTV_ISDBT_LAYERA_FEC</constant></link></para></listitem>
1143                         <listitem><para><link linkend="DTV-ISDBT-LAYER-MODULATION"><constant>DTV_ISDBT_LAYERA_MODULATION</constant></link></para></listitem>
1144                         <listitem><para><link linkend="DTV-ISDBT-LAYER-SEGMENT-COUNT"><constant>DTV_ISDBT_LAYERA_SEGMENT_COUNT</constant></link></para></listitem>
1145                         <listitem><para><link linkend="DTV-ISDBT-LAYER-TIME-INTERLEAVING"><constant>DTV_ISDBT_LAYERA_TIME_INTERLEAVING</constant></link></para></listitem>
1146                         <listitem><para><link linkend="DTV-ISDBT-LAYER-FEC"><constant>DTV_ISDBT_LAYERB_FEC</constant></link></para></listitem>
1147                         <listitem><para><link linkend="DTV-ISDBT-LAYER-MODULATION"><constant>DTV_ISDBT_LAYERB_MODULATION</constant></link></para></listitem>
1148                         <listitem><para><link linkend="DTV-ISDBT-LAYER-SEGMENT-COUNT"><constant>DTV_ISDBT_LAYERB_SEGMENT_COUNT</constant></link></para></listitem>
1149                         <listitem><para><link linkend="DTV-ISDBT-LAYER-TIME-INTERLEAVING"><constant>DTV_ISDBT_LAYERB_TIME_INTERLEAVING</constant></link></para></listitem>
1150                         <listitem><para><link linkend="DTV-ISDBT-LAYER-FEC"><constant>DTV_ISDBT_LAYERC_FEC</constant></link></para></listitem>
1151                         <listitem><para><link linkend="DTV-ISDBT-LAYER-MODULATION"><constant>DTV_ISDBT_LAYERC_MODULATION</constant></link></para></listitem>
1152                         <listitem><para><link linkend="DTV-ISDBT-LAYER-SEGMENT-COUNT"><constant>DTV_ISDBT_LAYERC_SEGMENT_COUNT</constant></link></para></listitem>
1153                         <listitem><para><link linkend="DTV-ISDBT-LAYER-TIME-INTERLEAVING"><constant>DTV_ISDBT_LAYERC_TIME_INTERLEAVING</constant></link></para></listitem>
1154                 </itemizedlist>
1155                 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1156                 </section>
1157                 <section id="atsc-params">
1158                         <title>ATSC delivery system</title>
1159                         <para>The following parameters are valid for ATSC:</para>
1160                         <itemizedlist mark='opencircle'>
1161                                 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
1162                                 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
1163                                 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
1164                                 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
1165                                 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
1166                                 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
1167                                 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem>
1168                         </itemizedlist>
1169                         <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1170                 </section>
1171                 <section id="atscmh-params">
1172                         <title>ATSC-MH delivery system</title>
1173                         <para>The following parameters are valid for ATSC-MH:</para>
1174                         <itemizedlist mark='opencircle'>
1175                                 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
1176                                 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
1177                                 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
1178                                 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
1179                                 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
1180                                 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem>
1181                                 <listitem><para><link linkend="DTV-ATSCMH-FIC-VER"><constant>DTV_ATSCMH_FIC_VER</constant></link></para></listitem>
1182                                 <listitem><para><link linkend="DTV-ATSCMH-PARADE-ID"><constant>DTV_ATSCMH_PARADE_ID</constant></link></para></listitem>
1183                                 <listitem><para><link linkend="DTV-ATSCMH-NOG"><constant>DTV_ATSCMH_NOG</constant></link></para></listitem>
1184                                 <listitem><para><link linkend="DTV-ATSCMH-TNOG"><constant>DTV_ATSCMH_TNOG</constant></link></para></listitem>
1185                                 <listitem><para><link linkend="DTV-ATSCMH-SGN"><constant>DTV_ATSCMH_SGN</constant></link></para></listitem>
1186                                 <listitem><para><link linkend="DTV-ATSCMH-PRC"><constant>DTV_ATSCMH_PRC</constant></link></para></listitem>
1187                                 <listitem><para><link linkend="DTV-ATSCMH-RS-FRAME-MODE"><constant>DTV_ATSCMH_RS_FRAME_MODE</constant></link></para></listitem>
1188                                 <listitem><para><link linkend="DTV-ATSCMH-RS-FRAME-ENSEMBLE"><constant>DTV_ATSCMH_RS_FRAME_ENSEMBLE</constant></link></para></listitem>
1189                                 <listitem><para><link linkend="DTV-ATSCMH-RS-CODE-MODE-PRI"><constant>DTV_ATSCMH_RS_CODE_MODE_PRI</constant></link></para></listitem>
1190                                 <listitem><para><link linkend="DTV-ATSCMH-RS-CODE-MODE-SEC"><constant>DTV_ATSCMH_RS_CODE_MODE_SEC</constant></link></para></listitem>
1191                                 <listitem><para><link linkend="DTV-ATSCMH-SCCC-BLOCK-MODE"><constant>DTV_ATSCMH_SCCC_BLOCK_MODE</constant></link></para></listitem>
1192                                 <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-A"><constant>DTV_ATSCMH_SCCC_CODE_MODE_A</constant></link></para></listitem>
1193                                 <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-B"><constant>DTV_ATSCMH_SCCC_CODE_MODE_B</constant></link></para></listitem>
1194                                 <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-C"><constant>DTV_ATSCMH_SCCC_CODE_MODE_C</constant></link></para></listitem>
1195                                 <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-D"><constant>DTV_ATSCMH_SCCC_CODE_MODE_D</constant></link></para></listitem>
1196                         </itemizedlist>
1197                         <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1198                 </section>
1199                 <section id="dtmb-params">
1200                         <title>DTMB delivery system</title>
1201                         <para>The following parameters are valid for DTMB:</para>
1202                         <itemizedlist mark='opencircle'>
1203                                 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
1204                                 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
1205                                 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
1206                                 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
1207                                 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
1208                                 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
1209                                 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem>
1210                                 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
1211                                 <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem>
1212                                 <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem>
1213                                 <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem>
1214                                 <listitem><para><link linkend="DTV-INTERLEAVING"><constant>DTV_INTERLEAVING</constant></link></para></listitem>
1215                                 <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem>
1216                         </itemizedlist>
1217                         <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1218                 </section>
1219         </section>
1220         <section id="frontend-property-cable-systems">
1221         <title>Properties used on cable delivery systems</title>
1222         <section id="dvbc-params">
1223                 <title>DVB-C delivery system</title>
1224                 <para>The DVB-C Annex-A is the widely used cable standard. Transmission uses QAM modulation.</para>
1225                 <para>The DVB-C Annex-C is optimized for 6MHz, and is used in Japan. It supports a subset of the Annex A modulation types, and a roll-off of 0.13, instead of 0.15</para>
1226                 <para>The following parameters are valid for DVB-C Annex A/C:</para>
1227                 <itemizedlist mark='opencircle'>
1228                         <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
1229                         <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
1230                         <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
1231                         <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
1232                         <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
1233                         <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
1234                         <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
1235                         <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem>
1236                         <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem>
1237                         <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem>
1238                 </itemizedlist>
1239                 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1240         </section>
1241         <section id="dvbc-annex-b-params">
1242                 <title>DVB-C Annex B delivery system</title>
1243                 <para>The DVB-C Annex-B is only used on a few Countries like the United States.</para>
1244                 <para>The following parameters are valid for DVB-C Annex B:</para>
1245                 <itemizedlist mark='opencircle'>
1246                         <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
1247                         <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
1248                         <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
1249                         <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
1250                         <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
1251                         <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
1252                         <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
1253                         <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem>
1254                 </itemizedlist>
1255                 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1256         </section>
1257         </section>
1258         <section id="frontend-property-satellital-systems">
1259         <title>Properties used on satellital delivery systems</title>
1260         <section id="dvbs-params">
1261                 <title>DVB-S delivery system</title>
1262                 <para>The following parameters are valid for DVB-S:</para>
1263                 <itemizedlist mark='opencircle'>
1264                         <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
1265                         <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
1266                         <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
1267                         <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
1268                         <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
1269                         <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
1270                         <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem>
1271                         <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem>
1272                         <listitem><para><link linkend="DTV-VOLTAGE"><constant>DTV_VOLTAGE</constant></link></para></listitem>
1273                         <listitem><para><link linkend="DTV-TONE"><constant>DTV_TONE</constant></link></para></listitem>
1274                 </itemizedlist>
1275                 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1276                 <para>Future implementations might add those two missing parameters:</para>
1277                 <itemizedlist mark='opencircle'>
1278                         <listitem><para><link linkend="DTV-DISEQC-MASTER"><constant>DTV_DISEQC_MASTER</constant></link></para></listitem>
1279                         <listitem><para><link linkend="DTV-DISEQC-SLAVE-REPLY"><constant>DTV_DISEQC_SLAVE_REPLY</constant></link></para></listitem>
1280                 </itemizedlist>
1281         </section>
1282         <section id="dvbs2-params">
1283                 <title>DVB-S2 delivery system</title>
1284                 <para>In addition to all parameters valid for DVB-S, DVB-S2 supports the following parameters:</para>
1285                 <itemizedlist mark='opencircle'>
1286                         <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
1287                         <listitem><para><link linkend="DTV-PILOT"><constant>DTV_PILOT</constant></link></para></listitem>
1288                         <listitem><para><link linkend="DTV-ROLLOFF"><constant>DTV_ROLLOFF</constant></link></para></listitem>
1289                         <listitem><para><link linkend="DTV-STREAM-ID"><constant>DTV_STREAM_ID</constant></link></para></listitem>
1290                 </itemizedlist>
1291                 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para>
1292         </section>
1293         <section id="turbo-params">
1294                 <title>Turbo code delivery system</title>
1295                 <para>In addition to all parameters valid for DVB-S, turbo code supports the following parameters:</para>
1296                 <itemizedlist mark='opencircle'>
1297                         <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
1298                 </itemizedlist>
1299         </section>
1300         <section id="isdbs-params">
1301                 <title>ISDB-S delivery system</title>
1302                 <para>The following parameters are valid for ISDB-S:</para>
1303                 <itemizedlist mark='opencircle'>
1304                         <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
1305                         <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
1306                         <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
1307                         <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
1308                         <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
1309                         <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
1310                         <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem>
1311                         <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem>
1312                         <listitem><para><link linkend="DTV-VOLTAGE"><constant>DTV_VOLTAGE</constant></link></para></listitem>
1313                         <listitem><para><link linkend="DTV-STREAM-ID"><constant>DTV_STREAM_ID</constant></link></para></listitem>
1314                 </itemizedlist>
1315         </section>
1316         </section>
1317 </section>