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HDTV 1200 C CI
• Press the button to activate the submenus for the output parameters.
—> The "Output parameter" – "
QAM-MODE
" submenu is activated.
o
utPut
Par a meter
(qam
modul ation
, i
nverting
the
user
signal
)
In this menu, you can set the QAM modulation and invert the user signal.
Bx 4A
/B
256-QAM
QAM
normal
QAM modulation
• 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.
Inverting 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 "Symbol rate" – "
QAM-RATE
" submenu is activated.
Содержание HDTV 1200 C CI
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