Product specifications

UT4500 Series Up Converter MN/UT4500.IOM

Maintenance and Troubleshooting Revision 2

7.2.3.3 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

Converter Module and return it to Comtech EF Data for repair.

7.2.3.4 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.

7.2.3.5 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.

7.2.3.6 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.

7.2.3.7 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.