Tst (Test) Key; Dme (Distance Measuring Equipment) Key - Honeywell PRIMUS 1000 Pilot's Manual

PRIMUSr1000 Integrated Avionics System
- TST (TEST) KEY -- Pushing TST activates the internal self--test
circuits for the component associated with the yellow cursors
present position. The self--test is a complete end--to--end test
of the function. Hold the TST button down for the duration of the
test, about 2 seconds for COM transceiver, 5--to--7 seconds for
DME, ATC, ADF, and about 20 seconds for NAV (VOR/ILS).
Releasing the TST button at any time immediately returns the
function to normal operation. If the TST button is held for 30
seconds or more, the radios automatically return to normal
operation.
- DME (DISTANCE MEASURING EQUIPMENT) KEY -- This key
disassociates the DME from the active VOR frequency, so a
different DME channel can be tuned without changing active VOR
(DME Hold). Subsequently pushing the DME key switches the
display and DME channel formats between VHF and TACAN.
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PRIMUS II Radio System
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