Setup to See S-Curve in FM Demodulator
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| Nov 7th 2020, 17:18 | |
Switch626Total Topics: 0 Total Posts: 0 |
Hello all, I was doing an alignment in a FM radio, your standard 88MHz-108MHz receiver. I completed the alignment but then thought I would see what a S-Curve looked like. I am injecting the FM signal into the base of a transistor (have a capacitor in series) that feeds a ratio detector tuned to the 10.7MHZ IF. I know I need two frequencies to view the curve in XY mode. Anyone know what the signals are: Do I modulate the 10.7MHz IF or sweep it? Where does the second signal go for XY? Any reference or help would be appreciated. 73's AG5EV |
| Nov 7th 2020, 20:54 | |
WA0CBWTotal Topics: 0 Total Posts: 0 |
Are you using a sweep RF generator? Bill |
| Nov 7th 2020, 21:34 | |
Switch626Total Topics: 0 Total Posts: 0 |
Hi Bill, Yes, I am using a sweep gen, |
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