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KA BAND OUTDOOR TWT AMPLIFIER
F-1
APPENDIX F
Optional Internal 1:1
Switch Controller
F.1 Optional Internal 1:1 Switch Controller
The optional Internal switch controller allows users to operate two Ka-Band TWTA ODU
amplifiers in a 1:1 redundant system. The internal controller also has the output to drive the
switch directly. The user only needs to connect a harness between the two amplifiers and a wave-
guide switch. This harness and the necessary wave-guide between the switch and the two
amplifiers can be custom designed by CPI as part of a redundant 1:1 system or designed by the
user into their own custom configuration. Connection details are shown in Figure F-1.
This option is installed in both amplifiers. Each amplifier can receive and send status to the other
amplifier.
When PA-1 and PA-2 are configured for this option, they can also report switch position back to
the user through the CIF (computer interface) and are reported on either the CPI remote control
panel or the supplied setup & remote control software (Note: See Appendix B for info on remote
software). Additionally, the user can change modes or remotely toggle the wave-guide position
through the remote or computer CIF control.
The internal controller receives external relay status signals from the other amplifier. These relays
can be configured for multiple types of 1:1 switch systems. The relays are normally configured to
switch the wave-guide when a “Low RF Alarm” occurs. The “Low RF Alarm” can be in “Rigid” or
“Flexible” mode. See chapter 4.3 in this manual for more information on the relay configuration
modes.
The switch controller can be set to be in either auto or manual mode. If in auto mode, and a relay
fault occurs the contacts open and the switch controller will toggle the wave-guide switch to the
other amplifier. In order for the switch controller to respond to toggle commands, its mode must
first be changed from auto to manual.
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F-1