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HDMU 790 C
QAM-Modulation:
In this menu item you can set the QAM modulation.
—> 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 prob-
lems, reception of the converted output signal can be affected.
• Use buttons
to select the cursor position for "
QAM…
" setting.
Bx 4A
!
6900 QAM 256
QAM–MODE
POS
• Use buttons
to set the QAM modulation ("
4
" … "
256
").
Inverting the user signal:
For exceptional cases and "older" digital cable receivers, the spectral position
of the user signal can be inverted "
NEG
". Factory default is "
POS
".
• Use
to place the cursor under "
POS
".
Bx 4A
!
6900 QAM 256
QAM–MODE
POS
• Use
to set the spectral position to "
NEG
".
• Press the button.
—> The "Substitute signal in the case of an incorrect input signal" –
"
FAILURE
" submenu is activated.
s
ubstitute
signal
in
the
Case
of
an
inCorreCt
input
signal
You use this menu to set whether a "
Single Carrier
" signal should be provid-
ed or the self-made tables "
Tables
" should transmitted furthermore whenever
an incorrect input signal occurs.
FAILURE
Bx 4A
Tables
