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PEDQ 3005/4005/5005 QMX
5
Programming
The following examples show how the PEDQ 4005 QMX cassette is programmed;
the output channels can be set from S21 to S41. The other cassettes that are
listed are set in the same way.
5.1 Preparation
Notes:
– In the "
LEVEL
" menu item, the cassette generates an equally powerful HF
carrier on the video carrier frequency of the channel. In this way, the cas
-
sette's level can also be set using an analogue TV test receiver that is set to
the video carrier frequency of the channel.
– In order to prevent interference within the head end station and the cable
system, the output level of the digital cassettes must be lowered by approx.
10 dB compared to analogue cassettes at 64 QAM, and by approx. 4 dB
compared to analogue cassettes at 256 QAM.
