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202058 REV AA
6 RU SSPA Chassis Operations Manual
7.1.2 Placing HPA3 in Standby Mode
To switch HPA3 into Standby Mode, press the “Unit 1” key on the front panel of HPA3.
If the unit is in “Auto” switching mode, and if HPA2 is not in a fault condition, the posi-
tion of SW1 will change to direct the output of HPA3 to the termination and the output
of HPA2 into the waveguide combiner. If HPA2 exhibits a fault condition, the system
will automatically switch HPA3 back online. See
Figure 7-4
.
HPA1 AND HPA2 COMBINED ONLINE;
HPA3 IN STANDBY;
SW1 AT POSITION 2; SW2 AT POSITION 1
SW1
SW2
Figure 7-4: System Mimic Path Display, HPA1 & HPA2 Online; HPA3 in Standby
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