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QAM-Modulation:
In this menu item you can set the QAM modulation.
• Use the
• Use
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
• Use
• Press the
s
u b s t i t u t e
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.
—> 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.
buttons to place the cursor under "QAM...".
Bx 4A
6900 QAM 256
to set the QAM modulation ("4" ... "256").
to place the cursor under "POS".
Bx 4A
6900 QAM 256
to set the spectral position to "NEG".
button.
—> The "Substitute signal in the case of an incorrect input signal" –
"FAILURE" submenu is activated.
s i g n a l
i n
t h e
C a s e
Bx
Tables
!
QAM–MODE
POS
!
QAM–MODE
POS
o f
a n
i n C o r r e C t
4A/B
FAILURE
- 21 -
i n P u t
s i g n a l
CC2CT 800 C
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