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HDMT 1000 ASI LAN / HDMT 1001 C
• Press the
button.
—> The "QAM modulation / Inverting the user signal" – "
QAM
" menu
is activated when the channel strips "
A
" without a CA module in-
stalled and "
B
" are programmed.
—> Programming the channel strip "
A
" with a CA module installed the
settings for the CA module are activated (page 38).
qam
modul ation
In this menu, you can set the QAM modulation and invert the user signal.
Bx 4A
256-QAM
QAM
normal
• 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 "Stuffing" – "
STUFFING
" menu is activated.
