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CC2CT 800 C
m
odul ator
on
/
off
, l
evel
This menu item is used to set the output levels of the four modulators to the
same value and to switch the modulators on or off.
LEVEL
– 3 dB
Bx 4A
/B
on
• Measure and note down the output level of each modulator.
—> To adjust the output levels to the output levels of the other cassettes
please pay attention to chapter "Final procedures" (page 36).
• Using the buttons
(ascending) or
(descending) activate the
"
LEVEL
" menu of all the modulators with higher output levels.
• By pressing
adjust the higher output levels to the output level of the
modulator with the lowest output level incrementally.
• Use the button to place the cursor under "on" resp. "off".
• Use the
buttons to switch each modulator on or off.
• Press the
button.
—> The "Channel / Frequency" – "
FREQ
" submenu is activated.
C
hannel
/ f
requenCy
In this menu you adjust the output channel (only at modulator A + C) or the
output frequency of the respective modulator.
—> The QAM signal is normally transmitted with a bandwidth of 8 MHz.
This means that you can only use the channel centre frequency of
the existing channel grid in the range of channels C21…C69 (fre-
quency grid 8 MHz). The CCIR channel grid is 7 MHz in the range
of the lower frequency bands (channels C5 … C12). If 8 MHz
QAM signal packages are transmitted in these channel ranges, this
will result in interference (overlapping) and transmission problems.
For programming in these channel ranges and in the frequency rang-
es below them, we recommend starting with frequency 306 MHz
going back in steps of 8 MHz (see frequency table on page 37).
Please note thereby that many receivers cannot receive the channel
ranges S21 … S41 (306 … 466 MHz).