6
Figure 10. The "RF input" table of the ttx410C module DVB-T/T2 standard
The „RF input" table for ttx410C module consists of following parameters:
"Modulation standard" - used to select from the "DVB-T/T2" and "DVB-C" modulation standards.
"Preamplifier power" - used to switch on/off the power for the RF preamplifier.
"Input bandwidth" - the bandwidth of DVB-T/T2 transponder. Can be selected from values 8 MHz and 7 MHz.
"Input frequency" – the frequency of the terrestrial or cable transponder in kilohertz.
When the tuner is locked to the DVB-T2 transponder with multi PLP modulation, the additional parameter "PLP number"
is displayed in the "RF input" table. When the "Modulation standard" is set to DVB-C, the „Preamplifier power" parameter
is hidden and power for the RF preamplifier is switched off; instead of the "Input bandwidth" parameter the "Symbol rate"
parameter is displayed. Enter the value in kilo symbols per second.
Figure 11. The "RF input" table of the ttx410C module DVB-C standard
Once the different data values have been entered, click on Update to conclude the input settings.
7.3.2. Input/output status table
The following information is displayed in the table “Input status”.
“Lock status” ”Locked” - the module has synchronized with the input signal; "Unlocked” - the module has not synchronized
with the input signal.
“Input level” - RF signal level at the module input. Level indication - approximate.
The values of the following parameters are displayed only if the module has synchronized with the input signal.
“Modulation standard” - detected standard of the input signal. Possible values of the standard: DVB-S, DVB-S2 (tdx410C);
DVB-T, DVB-T2, DVB-C (ttx410C).
“Frequency” - intermediate frequency (tdx410C) or RF frequency (ttx410C) at the
module input.
“Modulation” - modulation scheme of the input signal. Possible values of the
modulation scheme: QPSK, 8PSK (tdx410C); QPSK, QAM16, QAM32, QAM64,
QAM128, QAM256 (ttx410C).
“Modulation mode” - OFDM modulation mode of the input signal (ttx410C only).
Values: 8k or 2k.
“FEC” - forward error correction.
“Guard interval” - guard interval of OFDM signal (ttx410C only).
“Symbol rate” - the symbol rate of the satellite transponder in kilo symbols per
second (tdx410C only).
“SNR” - RF signal/noise ratio at the input of module.
“VBER” - bit error rate after Viterbi corrector. To get the signal without any errors at
the output of the tuner, VBER shall not exceed 2Е-4.
“PER” - ratio of the MPEG2 transport error packets to the whole number of packets. If
the number of error packet is equal to zero, the opposite value to whole number of
packets is displayed. Packet counters are reset during RF input parameters update.
“Input bitrate” - bitrate of the input signal.
Figure 12. Input status and output status table
