SYNOPSIS

struct dtv_frontend_properties {
u32 frequency;
enum fe_modulation modulation;
enum fe_sec_voltage voltage;
enum fe_sec_tone_mode sectone;
enum fe_spectral_inversion inversion;
enum fe_code_rate fec_inner;
enum fe_transmit_mode transmission_mode;
u32 bandwidth_hz;
enum fe_guard_interval guard_interval;
enum fe_hierarchy hierarchy;
u32 symbol_rate;
enum fe_code_rate code_rate_HP;
enum fe_code_rate code_rate_LP;
enum fe_pilot pilot;
enum fe_rolloff rolloff;
enum fe_delivery_system delivery_system;
enum fe_interleaving interleaving;
u8 isdbt_partial_reception;
u8 isdbt_sb_mode;
u8 isdbt_sb_subchannel;
u32 isdbt_sb_segment_idx;
u32 isdbt_sb_segment_count;
u8 isdbt_layer_enabled;
struct layer[3];
u32 stream_id;
u8 atscmh_fic_ver;
u8 atscmh_parade_id;
u8 atscmh_nog;
u8 atscmh_tnog;
u8 atscmh_sgn;
u8 atscmh_prc;
u8 atscmh_rs_frame_mode;
u8 atscmh_rs_frame_ensemble;
u8 atscmh_rs_code_mode_pri;
u8 atscmh_rs_code_mode_sec;
u8 atscmh_sccc_block_mode;
u8 atscmh_sccc_code_mode_a;
u8 atscmh_sccc_code_mode_b;
u8 atscmh_sccc_code_mode_c;
u8 atscmh_sccc_code_mode_d;
u32 lna;
struct dtv_fe_stats strength;
struct dtv_fe_stats cnr;
struct dtv_fe_stats pre_bit_error;
struct dtv_fe_stats pre_bit_count;
struct dtv_fe_stats post_bit_error;
struct dtv_fe_stats post_bit_count;
struct dtv_fe_stats block_error;
struct dtv_fe_stats block_count;
};

MEMBERS

frequency

frequency in Hz for terrestrial/cable or in kHz for Satellite

modulation

Frontend modulation type

voltage

SEC voltage (only Satellite)

sectone

SEC tone mode (only Satellite)

inversion

Spectral inversion

fec_inner

Forward error correction inner Code Rate

transmission_mode

Transmission Mode

bandwidth_hz

Bandwidth, in Hz. A zero value means that userspace wants to autodetect.

guard_interval

Guard Interval

hierarchy

Hierarchy

symbol_rate

Symbol Rate

code_rate_HP

high priority stream code rate

code_rate_LP

low priority stream code rate

pilot

Enable/disable/autodetect pilot tones

rolloff

Rolloff factor (alpha)

delivery_system

FE delivery system (e. g. digital TV standard)

interleaving

interleaving

isdbt_partial_reception

ISDB-T partial reception (only ISDB standard)

isdbt_sb_mode

ISDB-T Sound Broadcast (SB) mode (only ISDB standard)

isdbt_sb_subchannel

ISDB-T SB subchannel (only ISDB standard)

isdbt_sb_segment_idx

ISDB-T SB segment index (only ISDB standard)

isdbt_sb_segment_count

ISDB-T SB segment count (only ISDB standard)

isdbt_layer_enabled

ISDB Layer enabled (only ISDB standard)

layer[3]

ISDB per-layer data (only ISDB standard) layer.segment_count: Segment Count; layer.fec: per layer code rate; layer.modulation: per layer modulation; layer.interleaving: per layer interleaving.

stream_id

If different than zero, enable substream filtering, if hardware supports (DVB-S2 and DVB-T2).

atscmh_fic_ver

Version number of the FIC (Fast Information Channel) signaling data (only ATSC-M/H)

atscmh_parade_id

Parade identification number (only ATSC-M/H)

atscmh_nog

Number of MH groups per MH subframe for a designated parade (only ATSC-M/H)

atscmh_tnog

Total number of MH groups including all MH groups belonging to all MH parades in one MH subframe (only ATSC-M/H)

atscmh_sgn

Start group number (only ATSC-M/H)

atscmh_prc

Parade repetition cycle (only ATSC-M/H)

atscmh_rs_frame_mode

Reed Solomon (RS) frame mode (only ATSC-M/H)

atscmh_rs_frame_ensemble

RS frame ensemble (only ATSC-M/H)

atscmh_rs_code_mode_pri

RS code mode pri (only ATSC-M/H)

atscmh_rs_code_mode_sec

RS code mode sec (only ATSC-M/H)

atscmh_sccc_block_mode

Series Concatenated Convolutional Code (SCCC) Block Mode (only ATSC-M/H)

atscmh_sccc_code_mode_a

SCCC code mode A (only ATSC-M/H)

atscmh_sccc_code_mode_b

SCCC code mode B (only ATSC-M/H)

atscmh_sccc_code_mode_c

SCCC code mode C (only ATSC-M/H)

atscmh_sccc_code_mode_d

SCCC code mode D (only ATSC-M/H)

lna

Power ON/OFF/AUTO the Linear Now-noise Amplifier (LNA)

strength

DVBv5 API statistics: Signal Strength

cnr

DVBv5 API statistics: Signal to Noise ratio of the (main) carrier

pre_bit_error

DVBv5 API statistics: pre-Viterbi bit error count

pre_bit_count

DVBv5 API statistics: pre-Viterbi bit count

post_bit_error

DVBv5 API statistics: post-Viterbi bit error count

post_bit_count

DVBv5 API statistics: post-Viterbi bit count

block_error

DVBv5 API statistics: block error count

block_count

DVBv5 API statistics: block count

NOTE

derivated statistics like Uncorrected Error blocks (UCE) are calculated on userspace.

Only a subset of the properties are needed for a given delivery system. For more info, consult the media_api.html with the documentation of the Userspace API.

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