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Chapter 4 Operating the Modulator
Adjust the Frequencies of a Selected Carrier
Pressing the FREQ key allows you to access the output frequency screen, from
which you can select an RF output and adjust its output frequency.
Important! Frequencies set from the front panel of the MQAM are not recorded by
the DNCS. At the next MQAM restart, the frequencies are reset to the values stored
in the DNCS.
Adjusting the Output Frequency
Follow these steps to adjust the output frequency.
Important! Frequencies set from the front panel of the MQAM are not recorded by
the DNCS. At the next MQAM restart, the frequencies are reset to the values stored
in the DNCS.
1
Press FREQ on the front panel of the MQAM. The Output Frequency screen
appears with the frequency number flashing.
2
Press RF SEL to select an RF module.
Note: Press the RF SEL key repeatedly to scroll through the four RF modules.
3
Press the Up or Down Arrow keys to increase or decrease the output frequency
value of a selected RF module.
Note: The output frequency can be changed in 0.25 MHz increments from 91 to
869 MHz. To increment or decrement the frequency value in 6 MHz steps, press
and hold the Up or Down Arrow keys for about 2 seconds.
4
Press ENTER. The system saves the output frequency changes to NVRAM and
the default screen appears.
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Troubleshooting
