Comtech EF Data UT-4579 Installation And Operation Manual page 189

UT-4579 X-Band Up Converter MN/UT4579.IOM
Appendix A Revision 1
Figure A-11 shows the front panel displays after power has been turned off on
Converter #01. Note the ON LINE LED is lit on the BU. This indicates that the BU
is now providing the frequency translation in place of the faulted unit. Converter
#01 will not come back online until power is restored.
Figure A-11. Front Panel Example – Up Converter #01 Backup
A–11