Apparatus for testing microwave radios having 35 MHz if using te

Details Apparatus for testing microwave radios having 35 MHz if using te Apparatus for testing microwave radios having 35 MHz if using te

1981-07-20

1983-03-01

Ng, Jin F.

Telecommunications

Transmitter and receiver at separate stations

Having measuring, testing, or monitoring of system or part

455 9, 17917531R, 324 57DE, H04B 1700

Patent

active

043756980

ABSTRACT:
A 70.+-..DELTA.f MHz sinusoidal test signal from a standard radio link test set is down converted and shaped to obtain a 35.+-..DELTA.f/2 MHz sinusoidal test signal to be applied to the radio set under test. The output of the radio set is applied to an up converter in which a multiplier is used that maintains the amplitude information as it doubles the frequency. The 70.+-..DELTA.f MHz test signal from the up converter is then applied to the input of the radio link test set, and the characteristic is measured as if the radio set under test employed a 70 MHz IF, rather than a 35 MHz IF.

REFERENCES:
patent: 3988678 (1976-10-01), Hodge
patent: 4025854 (1977-05-01), Oades
patent: 4317206 (1982-02-01), Nossen

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