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CGT 660
C
hannel
/ f
reQuenCy
set ting
In this menu, you can choose whether you require the channel or frequency
setting for the adjustment of the HF output. The channel setting covers the
range of channels S21 … C69, the frequency setting covers the range from
42.0 MHz to 860.0 MHz.
Bx 1A
/B
Channel
OUTPUT
Bx 1A
/B
Freq.
OUTPUT
—> The QAM signal is normally transmitted with a bandwidth of 8
MHz. This means that you can only use the channel centre frequen-
cy of the existing channel raster in the range of channels S21 …
C69 (frequency raster 8 MHz). The CCIR channel raster is 7 MHz
in the range of the lower frequency bands (channels C2 … S20).
Therefore the frequency setting is used here. If one uses the existing
channel raster of 7 MHz in these channel ranges, this will result in
interference (overlapping) with the 8 MHz QAM signal packages,
thus causing transmission problems.
—> For programming in these channel ranges and in the frequency
ranges below them, we recommend starting with channel S21 /
306 MHz going back in steps of 8 MHz (s. table on page 35), or
reducing the bandwidth of the QAM output signal by removing sta-
tions.
—> Using "SelecPlex
®
" only the frequency setting can be used.
• Use
to select channel setting "
Channel
" or frequency setting "
Freq.
".
• Press the
button.
—> The "Output channel" resp. "Output frequency" – "
OUTPUT
" menu
is activated.
