Comtech EF Data CDM-625A, Инструкция по установке и эксплуатации

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CDM-625A Advanced Satellite Modem MN-CDM625A
CDM-625A ODU (Transceiver, BUC, LNB) Operation Revision 4
10–12
10.3.3.3.2 ODU: LNB:PwRef (Power Supply and Reference)
LNB control/monitor:
PSU-and-10MHz LO-freq PSUmonitor (

)
The modem can supply DC power to an LNB connected to the Type ‘N’ rear panel Rx connector.
It can also supply a 10 MHz reference for a phase-locked LNB. Use the ◄ ► arrow keys to select
PSU-and-10MHz , LO- freq , or PSUmonitor , and then press ENTER .
10.3.3.3.2.1 ODU: LNB:PwRef

PSU-and-10MHz
LNB: Voltage=Off 10MHz:Off (Off,On)
Alarm limits, from 000 to 500 mA (

)
Use the ◄ ► arrow keys to select Voltage , 10MHz , or Alarm Limits . Then, use the
▲▼
arrow
keys to change that setting:
Selection Setting
Voltage Select Off , 13V , 18V , or 24V
10MHz Set the 10MHz Reference as Off or On .
Alarm Limits
Use the◄ ►arrow keys to select a digit to edit, and then use the ▲▼ arrow keys to
change that digit. Valid range, in mA, is 000 to 500 .
Press ENTER when done.
10.3.3.3.2.2 ODU: LNB:PwRef

LO-Freq (Local Oscillator
Frequency)
LNB-LO: Frequency= 00000 MHz
Mix= High [-] (Hi,Lo) (

)
Use the ◄ ► arrow keys to select the LNB-LO (Local Oscillator)
Frequency
for the
downconversion, or Mix to set the polarity for the downconversion mix in the LNB.
On the top line – To set the LNB-LO Frequency , use the ◄ ► arrow keys to select a digit to edit,
and then use the
▲▼
arrow keys to change that digit. The valid LO range is 3000 to 65000 MHz.
Entering a non-zero value for LNB LO causes the Rx-IF frequency menu to show LO and Satellite
frequencies (
satellite frequency = LO frequency
±
modem frequency
).
Press ENTER when done.
On the bottom line – To set the Mix polarity , use the
▲▼
arrow keys to set polarity as Hi (to
indicate a high side, inverting mix) or Lo (to indicate a low side, non-inverting mix).
Press ENTER when done.