16 FlexCoder
Instruction Manual
4.6 “Main > QAM Config” Screen
The “Main > QAM Config” screen (Figure 4.6) allows configuration of the following parameters:
Output Channel/Frequency:
user must assign an RF channel number to the first RF QAM output of the Quad-QAM
module (i.e. RF channel 2, as shown in Figure 4.6). The remaining three RF QAM channels will be automatically
assigned to the next adjacent channels (i.e. RF channels 3, 4, and 5). The range is NTSC channels 2 to 155.
Output Control:
allows the user to turn each of the RF channels On/Off.
CW Control:
allows the user to switch the QAM output mode to CW (Continuous Waveform), which activates
an analog carrier at the selected channel’s center frequency comparable to the digital QAM output level. It is
typically used when only an analog signal level meter is available to measure the modulator’s output during
installation and servicing.
Input Channel:
Drop down list of channel/frequency dependent upon MAP selection.
QAM Mode:
Choices are 256B and 64B
QAM Map: Choices are:
STD, HRC and IRC (QAM) and 8VSB for OTA.
4
1
5
2
6
3
CW Control must be unchecked for normal operation.
Figure 4.6 - “Main > QAM Config” Screen
1
2
3
4
5
6
7
8
9
10
11
13
12
A
B
All Modes
Pass-Thru and Mux Mode Only
In the section entitled,
“RF Input”
, the user must have the RF Input Option (Stk# 6582-RFI) in order to select and
configure the following parameters:
