G - Physics – 01 – R
Patent
G - Physics
01
R
324/37
G01R 23/06 (2006.01) G01R 23/02 (2006.01) G01R 23/12 (2006.01) H04B 14/00 (2006.01)
Patent
CA 1122275
D-20,386 FREQUENCY DEVIATION MEASURING AND ADJUSTING SYSTEM by Maurice C. Harp and Terry R. Seaver ABSTRACT OF THE DISCLOSURE A calibrated unipolar signal is used to deviate a frequency modulator by a predetermined amount .DELTA.f from a carrier fc. An automatic frequency control circuit operates to bring the carrier back on frequency and a meter connected in the control circuit will read this departure from normal. During the test for correct deviation, a frequency shifter compensates for the predetermined frequency deviation and the meter would so indicate, i.e., would not change reading from that of carrier alone, if the deviation caused by the calibrated unipolar signal is equal to that incorporated in the frequency shifter. If the reading does change, the modulation sensitivity of the frequency modulator is adjusted until the readings before test (using carrier only) are the same as those under test.
309572
Harp Maurice C.
Seaver Terry R.
Gte Automatic Electric Laboratories Incorporated
Wray Robert William
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