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HDE-4S-PRO
Instruction Manual
Output Channel/Frequency:
User must assign an RF channel number to the RF QAM output of the Quad-QAM module
(i.e. RF channel 2, as shown in Figure 5.9). 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:
turns each of the 4 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 encoder’s output level during installation and servicing.
Final Output Level:
selects the QAM RF output level for the combined output. The range is 35 to 42 dBmv. A 40 dBmv
output level (default) is recommended.
Output QAM Mode:
selects the desired QAM modulation mode. Possible 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:
selects the desired QAM Map (channel/frequency plan). Possible options are STD, IRC, and HRC.
Output QAM Data Rate:
indicates the 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.
The RF Channel number will be displayed on TV only if the source stream does not carry any
virtual channel number.
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Remember to click on the SAVE button to apply the new values/configurations.
