Comtech EF Data LBC-4000 Installation And Operation Manual page 36

L-Band Up/Down Converter System
System Operation
CONFIG Fault Recovery:
UTIL Ref-Osc:
Adjust=087 (◄►▲▼ ENT)
Notes 1: The default Reference Frequency tuning adjustment is 87, with values from 0 to 255.
2: In Configuration, Converter A – ATT/SLOPE menu, the Gain Offset Command is
available only if redundancy is enabled. It allows gain offset compensation for the user
can match gain between the two converters. It will be set at installation only. In
operation, the normal attenuation setting should be used.
1. Monitor output signal level on power meter / spectrum analyzer.
2. Enable redundancy on converter.
3. Put converter into "Manual" redundancy mode.
4. Force converter B online and measure output.
5. Force converter A online and adjust "OFST" until output matches converter B.
6. Repeat steps 4 and 5 until output levels track.
7. Return unit to desired redundancy state.
Mode = Manual
3-10
MN/LBC4000.IOM
Revision 2