Polytron PCU 4111, User Manual

Page: 13 / 52

13
The guidelines shown apply to the signal-to-noise ratio SNR.
The corresponding values of the FEC (forward error correction) have to
be taken from the tables of the satellite operators. If e.g. the
transponder has an FEC of 5/6, the SNR display must be at least 9 dB
to guarantee good signals.
8.2.2. Input parameters for the terrestrial range
TP > Input Frequency
The kind of input signal
will be identified automatically.
Select input frequency
BW > Channel Bandwidth
7 or 8 MHz
PLP > Select Service (DVB-T2)
Search > Searching
After the button
Search
has been
activated, the data is accepted and the
desired channel is set.
Select PLP
If
the tuner finds the channel
Tuner Locked
is displayed in the upper
field.
Receiving Conditions
The quality of the input signal can be evaluated using the bit error ratio
BER
and the signal-to-
noise ratio
SNR
.
Recommendation: bit error ratio
BER
should be
≤1e-6
For DVB-T, the limit value for the signal-to-noise ratio
SNR
at DVB-T is 26 dB
and 32 dB for DVB-T2.
FEC gut sehr gut
1/2 5-7dB 8-11dB
2/3 7-9dB 10-13dB
3/4 8-10dB 11-14dB
5/6 9-11dB 12-15dB
7/8 10-12dB 13-16dB
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