Triax CG2CT 860 C, Руководство по сборке

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5 p
rogramming
5.1 p
repar ation
• Test the software versions of the head-end station and the QAM module and
update them if necessary. The current software versions can be found on the
website "
www.triax.com ".
• Connect the test receiver to the modulator output on the QAM module
G
or to
the RF output on the output collector if it is already connected (page 9).
• Adjust the test receiver to the output channel / output frequency of the chan-
nel strip to be set.
• Switch on the channel strip (modulator) if necessary (page 16). For each chan-
nel strip, there is an status LED which indicates if the channel strip is switched
on.
Status LEDs
Channel strip A
not used
not used
Channel strip B
• Balance the output levels of the channel strips and level them to the output
levels of the modulators of other modules used if the difference in level is ≥
1 dB (page 16).
5.2 n
otes on level set ting
In order to prevent interference within the head-end station and the cable sys-
tem, the output level of the module must be decreased by 10 dB compared to
analogue modules at 64 QAM, and by 4 dB compared to analogue modules
at 256 QAM.