User`s guide

Chapter 3 3-5
Theory of Operation and Troubleshooting
Theory of Operation
Test Set Interface
The test set interface board provides biasing for active devices under test
with an external dc voltage. Only Port 1 can provide bias. Bias supplied
to Port 1 is applied directly to the center conductor pin. In addition, the
test set interface board provides the drive signals for all internal
solid-state switches.