Transceiver multiplexers TD-1288/GRC and TD-1289/GRC

This annual report summarizes the activity on the VHF Transceiver Multicoupler for the year ending 30 September 1979. During the previous report period, the 2 channel and 5 channel multiplexers with an expanded upper frequency range of 88 MHz were developed. In addition to the expanded frequency range, a filter simulator was developed to substitute for any filter module in an unused channel. During this report period, final testing on the engineering models was completed and the design was finalized. Any resulting changes or discrepancies with the drawing package were then updated to insure conformance by the production models. Final assembly of the production units was begun in April with the first units being delivered to the engineering test area in June for the start of the engineering design test (qualification test). Results of this test are summarized.