G - Physics – 01 – S
Patent
G - Physics
01
S
343/1, 354/2
G01S 7/40 (2006.01) G01S 13/88 (2006.01) H03L 7/081 (2006.01)
Patent
CA 1111952
RADAR ALTIMETER SIMULATOR ABSTRACT OF THE DISCLOSURE An altitude simulator for checking the range accuracy of a radar altimeter is disclosed. Typical alti- meters include a transmitter and a receiver. The simulator receives a multipulse trigger signal from the altimeter to be checked. The trigger signal is synchronized with the output pulses of the transmitter. This trigger signal forms an input to a phased locked loop to generate at the output of the phased locked loop a multipulse signal which is synchronized with and phase displaced from the trigger signal by an amount equal to the inherent time delays in the simulator. The output signal of the phase locked loop is coupled to the input of a pulse generator which is program- mable to generate a multipulse output signal synchronized with and phase displaced from the output signal of the phase locked loop by a selected fixed amount. A modulator receives an RF input from a signal generator and the output signal of the pulse generator to produce at the output of the modulator, a pulse modulated RF signal. This pulse modulated RF signal is coupled to the receiver as an input signal and is used to test and calibrate the altimeter.
313702
Bush Louis W.
Cumming Allen R.
Mcconnell And Fox
Westinghouse Electric Corporation
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