Comtech EF Data UT-4500 Series - Manual (Page 106)

UT4500 Series Up Converter MN/UT4500.IOM
Maintenance and Troubleshooting Revision 2
88
7.2.3.3 RF C
ONVERTER
M
ODULE
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
Converter Module and return it to Comtech EF Data for repair.
7.2.3.4 S
YNTHESIZER
S
UM
L
OOP
M
ODULE
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.
7.2.3.5 S
YNTHESIZER
F
INE
S
TEP
M
ODULE
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.
7.2.3.6 R
EFERENCE
O
SCILLATOR
M
ODULE
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.
7.2.3.7 T
EMPERATURE
F
AULT
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.