In innovative telemetry scheme, time between pulses of light transmitted along optical fiber represents measured quantity. In period modulator, time varied by varying control-input voltage, which serves as critical voltage of relaxation oscillator. Demodulator is simple state estimator, no discriminator or phase-locked loop needed. Applicable to radio or wire transmission. Pulses proportional to temperature, pressure, voltage, or other variable monitored remotely.
Period Modulation For Telemetry
NASA Tech Briefs ; 16 , 5
1992-05-01
Miscellaneous
No indication
English
Pulse-frequency-modulation telemetry
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