Reasons to use Analog Demod

AM Amplitude Modulation - CW modulation using amplitude variation in proportion to the amplitude of the modulating signal. Usually taken as DSB-LC for commercial broadcast transmissions and DSB-SC for multiplexed systems., PM, and FM Frequency Modulation signals commonly consist of a high-frequency carrier signal modulated by a lower-frequency audio, video, or data signal. For these signals, analog demodulation removes the carrier frequency leaving the modulating signal which is contained in the sidebands of the carrier signal.

The most obvious use for Analog Demod is analyzing intentionally modulated signals as noted above. However, Analog Demod is also useful in analyzing signals which are not intentionally modulated. For example it is possible to:

• Apply phase and frequency demodulation to oscillator or synthesizer designs to examine phase and frequency trajectories during frequency hops or to establish phase-lock-loop lock-up time.

• Demodulate a burst signal to evaluate wait time to determine when a signal stabilizes.

• Amplitude and phase demodulate sidebands to determine the type of modulation present in phase noise.

• Demodulate bearing noise in mechanical measurements to examine frequency instability.

• Examine frequency versus time of chirp signals.