FIELD: radar systems.
SUBSTANCE: frequency modulated altimeter includes reference analog signal source, digital control unit for controlling rate of readjustment of frequency of transmitter, modulator, frequency-modulated transmitter, transmitting antenna, receiving antenna, first mixer, difference frequency amplifier, computing counter, clock pulse generator, switch for switching sign of readjustment of transmitter frequency. Novelty is that altimeter also includes comparator, pin-switching unit, second mixer, reference frequency generator, band amplifier, detector, logic gate unit.
EFFECT: lowered instrumental component of error at measuring height occurred due to unstable characteristics of electronic frequency readjustment of transmitter.
6 dwg
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