AR 10006896, Operating And Service Manual

Page: 25 / 68

Model 500T2G8
Rev E
13
CAUTION:
Do not rely on the external interlock for personnel protection. The intent
of the external interlock feature is to disable the RF output for equipment
protection. Use proper operating and safety procedures to insure that
power is removed for personnel safety.
In addition, the interlock is provided with an external inhibit function. To enable the TWT grid on, it is
necessary to provide continuity between pins 10 and 11 of J2. Breaking continuity drives the grid to the bias
condition, shutting off the tube and disabling the RF output. As soon as continuity is restored, the tube will
again be turned on; no reset is required.
There is an internal jumper between J2 pins 1 and 2; a continuity check through these pins can be used to
verify the presence of the amplifier in the instrumentation system.