26
HDE-8C DIN Series
Instruction Manual
Output Control:
turns each of the 4 RF channels On/Off.
CW Control:
allows the user to switch QAM output mode to CW (Continuous Wave) which activates an analog carrier
at the selected channel’s center frequency; this is typically used in level adjustment of the system.
Output Level:
allows user to select the level for the QAM RF output. The range is 35 to 45 dBmV. It is recommended to
maintain the output level at 40 dBmV for normal operation.
Output QAM Mode:
allows user to select desired QAM modulation mode. Options are: “64B”, “256B”, “16A”, “32A,
“64A”, “128A”, and “256A”. For most applications in the USA, the recommended QAM modulation mode is 256B.
Output QAM Map:
allows user to select desired QAM Map (channel/frequency plan). Options are: “STD”, “IRC”, and
“HRC”.
Output QAM Data Rate:
indicates the maximum data rate depending on the selected QAM mode, for example 5.360500
Mbaud for QAM 256B.
Output QAM Interleaver:
indicates the interleaver value for the selected QAM mode.
Output QAM Alpha:
indicates the Alpha value for the selected QAM mode.
QAM Lock State:
indicates whether Quad-QAM module is working properly (locked) or not.
NOTE:
The module may take a few seconds to lock when QAM output parameters are changed.
6.6.2 “Main > Output > QAM” Screen
The “Main > Output > QAM” screen (
) is a “user-configurable” screen to assign QAM parameters to the TS:
Output Channel/Frequency:
user must assign a RF channel number to the RF QAM output of the Quad-QAM module
(i.e. RF channel 50, as shown in
). The remaining three RF QAM channels will be automatically assigned to
the next adjacent channels (i.e. RF channels 51, 52, and 53). The range is NTSC channels 2 to 155.
Figure 6.6.2 - “Main > Output > QAM” Screen
1
2
3
4
5
6
7
8
9
10
2
3
4
6
7
8
9
10
1
5
Remember to click on the SAVE button to apply the new values/configurations.
RF Channel number will be displayed on TV only if source stream does not carry any virtual channel number.