DME timing apparatus and methods

Details DME timing apparatus and methods DME timing apparatus and methods

1975-04-28

1977-01-04

Tubbesing, T.H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

G01S 956

Patent

active

040018245

ABSTRACT:
A ranging timer allows decoded data pulses to toggle a flip flop, thereby initiating a transmission cycle. In a specific embodiment, the data pulses condition a second flip flop to energize the DME transceiver. During the next negative excursion of a 96 microsecond reference clock, the second flip flop is toggled, and during the next period of the reference clock, the decoder is disabled, the transmitter-modulator is energized, the ranging timer is enabled, and the first flip flop is reset. Since the time between the decoded data pulses is variable, jitter is built into the commencement of each transmission cycle.

REFERENCES:
patent: 3781888 (1973-12-01), Bail
patent: 3889260 (1975-06-01), Griffin

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