- 30 -
HDMC 1000 C
• Press the
button.
—> The "Output parameter" – "
QAM
" menu is activated when the
channel strips "
A
" without a CA module installed and "
B
" are pro-
grammed.
—> Programming the channel strip "
A
" with a CA module installed the
settings for the CA module are activated (page 38).
o
utPut
Par a meter
In this menu, you can set the QAM modulation and invert the user signal.
Bx 4A
/B
256-QAM
QAM
normal
qam
modul ation
•
Use
to set the QAM modulation ("
4
" … "
256
").
—> For higher QAM modulation, the output symbol rate is decreased.
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 affected.
i
nverting
the
user
signal
For exceptional cases and "older" digital cable receivers, the spectral position
of the user signal can be inverted "
inverse
". The factory default is "
normal
".
• Use
to place the cursor under "
normal
".
• Use
to set the spectral position to "
inverse
".
• Press the
button.
—> The "Output data rate" – "
STUFFING
" menu is activated.
