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12 V dc assortment of test audio signal bandstop filters binary block diagram BPSK C₁ calculated in step circuit shown conversion gain cutoff frequency dc control voltage decibel decibel values demodulator describe what effect DSBFC modulator farads feedback FM modulator following formula frequency deviation frequency hertz frequency synthesizer function generator output hertz input signal leads and hookup linear integrated-circuit lowpass filter measured in step modulating signal observe the operation observed at Vout op amp oscilloscope oscilloscope 10 MHz output signal output voltage output waveform parity peak detector phase-locked loop protoboard R₁ R₂ resonant frequency schematic diagram section is shown Set the amplitude shown in Figure signal generator output sine wave Sketch the waveform square wave standard oscilloscope switches transistor tuned amplifier tuned circuit UART uF capacitor VCO free-running frequency VCO output frequency voltage gain voltage-controlled oscillator Vp-p waveform observed ΚΩ