The RI8563A 5-40.5 GHz Test Instrument Module (TIM) is a single slot module that extends 20GHz general tester coverage to 40.5GHz on Cassini test systems. Each TIM provides one source/receive port and one receive only port. The 20-40.5GHz TIM requires two 20GHz sources (RF and LO) be configured in the same test system. Full access to 20GHz resources is maintained via pass through paths provided in the TIM. Calibration is available at the TIM and Fixture level.