Rf Converter Module; Synthesizer Sum Loop Module; Synthesizer Fine Step Module; Reference Oscillator Module - Comtech EF Data DT-4500 Series Installation And Operation Manual

DT-4500 Series C- and Ku-Band Down Converters MN/DT4500.IOM
Appendix B Revision 2
B.2.3.3 RF Converter Module
IFLO Lock Detect: A fault ("FT") indicates that the IFLO is not locked. Check all
connections to the converter module to make sure they are secure. If the fault still
exists, remove the module and return it to Comtech EF Data for repair.
B.2.3.4 Synthesizer Sum Loop Module
Sum Loop Detect: A fault ("FT") indicates that the sum loop is not locked. Check
all connections to the converter module to make sure they are secure. If the fault
still exists, remove the Sum Loop Module and return it to Comtech EF Data for
repair.
B.2.3.5 Synthesizer Fine Step Module
Coarse Loop Detect: A fault ("FT") indicates that the coarse loop is not locked.
Check all connections to the converter module to make sure they are secure. If the
fault still exists, remove the Fine Step Module and return it to Comtech EF Data for
repair.
Fine Loop Detect: A fault ("FT") indicates that the fine loop is not locked. Check all
connections to the converter module to make sure they are secure. If the fault still
exists, remove the Fine Step Module and return it to Comtech EF Data for repair.
B.2.3.6 Reference Oscillator Module
Reference Lock Detect: A fault ("FT") indicates that the reference oscillator
detected an external reference, but could not lock to it. Disconnect the external
reference. If the fault still exists, remove the Reference Module and return it to
Comtech EF Data for repair.
B.2.3.7 Temperature Fault
Converter Over Temperature Fault: A fault ("FT") indicates that the converter is
over temperature. Turn the prime power switch off and return the converter to
Comtech EF Data for repair.
B–4