• Press the
button.
—> The “Setting the QAM modulation” – “
QAM
” menu is
activated when the channel strips “
A
” without a CA
module installed and “
B
” are programmed.
Programming the channel strip “
A
” with a CA module
installed the “Setting the operating voltage for the
CA module” – “
” menu is activated (s. page 32).
Setting the QAM modulation
In this menu, you can set the QAM modulation and invert the
user signal.
• Use
to set the QAM modulation (“
4
” … “
256
”).
—> For higher QAM modulation, the output symbol rate is
lowered. An output QAM modulation of > 64 QAM
places a large burden on the cable network. Due
to noise, delay and frequency response problems,
reception of the converted output signal can be im-
peded.
Bx 4A
64-QAM
QAM
normal
▶
◀
/
4 … 256
normal / inverse
!
Kanalzug “A” mit CA-Modul
Channel strip “A“ with CA module
ohne CA-Modul
without CA module
Kanalzug “B”
Channel strip “B“
