8.4e Enter and record in your workbook, the peak-to-peak amplitude of the
‘noise’ output at tp73 (in volts).
An easy way to prevent problems due to noise is to remove it by means of an
Amplitude Limiter circuit placed before the detector. This ensures that the input
signal to the Detuned Resonant Circuit Detector has a constant amplitude.
I Connect the Amplitude Limiter block between the Mixer/Amplifier and the
Detuned Resonant Circuit Detector blocks as shown in Figure 103 below:
As you will recall, the amplitude limiter removes amplitude variations from the
FM output signal from the modulator so that the input to the detuned resonant
detector has a constant amplitude.