Integrated L-Band Up/Dn Converter
LT3600
CG-1309
Page 18
3.1.4 Backup Converter Operation
The Backup Converter must be programmed to store all of the Converter Frequencies and Gains in the
system, in its Satellite Memory Locations, corresponding to the Converter Number (1 to 8) labeled on
the StarSwitch Interface cables. Figure 3-7 shows the Backup Converter in Auto Mode ready to
Backup any converter in the system and after backing up Converter 2.
Figure 3-7 StarSwitch Display – Backup Converter
3.1.5 StarSwitch Alarm
The StarSwitch Alarm is displayed as “Fault” in the StarSwitch Menu Window on the Backup
Converter only. A fault indicates either an internal StarSwitch Unit failure or a Power Off condition
detected on any one of the Converters in the system. The StarSwitch Alarm however, does not
activate the Summary Alarms, and the Backup Converter will still backup an Online Converter when it
is powered down. Figure 3-8 shows the Backup Converter display after Converter 1 has been powered
off and the Backup has taken over.
Figure 3-8 StarSwitch Display – Fault Indication
3.1.6 Dual StarSwitch Operation
Each LT3600 Converter has two StarSwitch Interface connectors (J8, Main and J5, Secondary) to
control two StarSwitch Units, for systems where switching for both Up and Down Converter sections
is required. The two interfaces are not independent as an alarm in either Up or Down Converter
system will cause both to switch to the backup converter. This is necessary since a failed unit,
including both Up and Down Converter sections, will need to be removed for service. Ensure that J8,
Main Interface, is used if only one StarSwitch Unit is configured in the system.
STARSW: Fault ON 1
MODE: Auto
STARSW: OK ON 2
MODE: Auto
STARSW: OK STBY
MODE: Auto
