Xicom TWTA - Figure 10, RF Inhibit with External Source

Unpacking and Installation, TWTA Octagon CPU
MNC-0300-003 16 of 22 Revision N
Figure 9, RF Inhibit with Internal Source
Figure 10, RF Inhibit with External Source
Mixing internal and external references can result in damage to
the equipment if there is a difference in ground potential
between the controller and the TWTA. If you need to invert the
RF Inhibit logic, RF inhibited when switch A is open, the TWTA
can be ordered with Jumper JP9 in the alternate position, or an
external resistor can be used as shown in Figure 11 , RF Inhibit
with Switch A Open.