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HDE-1C-QAM
Instruction Manual
Output Channel/Frequency:
user must assign an RF channel number to the RF QAM output of the QAM module (i.e.
RF channel 2, as shown in Figure 5.7). The range is CATV channels T7 to T14, 2 to 158.
Output Control:
allows the user to turn the QAM RF output On/Off.
CW Control:
allows the user to switch the 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.
Final Output Level:
user must select the QAM RF output level for the output. The range is 32 to 42 dBmV. It is
recommended to maintain the output level at 40 dBmV for normal operation.
Output QAM Mode:
user must select the 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:
user must select the desired channel Map. Options are STD, IRC, and HRC.
Output QAM Data Rate:
indicates the maximum data rate depending on the selected QAM mode, for example
5.3605 Mbaud for QAM 256B.
Output QAM Interleaver:
indicates the interleaver value for the QAM mode.
QAM Lock State:
indicates whether QAM module is working properly (locked) or not.
NOTE:
The module may take a few seconds to lock when QAM output parameters are changed.
5.7 ”Main > QAM" Screen
The “Main > QAM” screen (Figure 5.7) is a “read and write” screen to assign QAM parameters to the TS:
Remember to click on the SAVE button to apply the new values/configurations.
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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Figure 5.7 - “Main > QAM” Screen
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