GSS HDE 400, Инструкция по сборке, Страница: 26 / 50

- 26 - HDE 400
o
utPut symbol r ate
, qam
modul ation
—> This menu is only displayed if "QAM modulation" is selected in
menu "RF output" (page 23)!
In this menu you can set the output symbole rate, the QAM modulation and invert
the user signal.
Bx 2
6900 QAM QAM
256 POS
Output symbole rate:
In this menu item you can set the output symbole rate.
• Use the buttons to place the cursor under the number to be changed
of e.g. "6900" and set the symbol rate with the buttons .
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 the buttons to place the cursor under " QAM… ".
• Use 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 ".
• 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 (page 33).