Differential gain

Although mainly oriented to digital modulations, Radiosim can also be used to solve analog transmission problems. Here, the differential gain at 3.58 MHz due to a symmetrical Butterworth filter is displayed. Four DC steps are applied to the FM modulator. The DG variation is 3.5 % (differential gain and differential phase affect the transmission quality of analog television).
The differential phase is not displayed here.

diffgain.gif (4577 octets)

Other examples : Fresnel plan   Eye diagram    Group delay of a feeder  Group delay of a filter
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