A test signal generator according to claim 3 wherein Means for combining with said first modulated carrier wave and said first signal a sine wave having a frequency of one-half the frequency of said carrier.Ĥ. A test signal generator according to claim 2, comprising Second modulator means for modulating a radio frequency carrier with said combined signal.ģ. A test signal generator according to claim 1, comprising Means for combining said first modulated carrier wave with said first signal to provide a combined test signal.Ģ. Second means for shifting the phase of the selected one of said sine waves through one of a plurality of predetermined, discrete phase angles corresponding to the selected one of said gain factors and to the selected one of said sine waves to produce a second signal,įirst modulator signal means for modulating a carrier wave with said second signal to provide a first modulated carrier wave, and Means for generating a plurality of sine waves at respective ones of a plurality of different audio frequencies,įirst means for adjusting the level of a selected one of said sine waves by a selected one of a plurality of discrete gain factors to produce a first signal, A test signal generator, comprising in combination
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