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Old 12th May 2017, 9:00 am   #22
Nuvistor
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Join Date: Aug 2013
Location: Wigan, Greater Manchester, UK.
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Default Re: Avantic BM611 Stereo Decoder

You can use a standard sig gen to test the bandwidth of the IF and det but the gen needs to be accurate.
It's a Foster Seeley det and I forget if it as a DC output like a ratio det, but you could used a diode probe to det the output.
Monitor the output while swinging the gen across the IF range, then calibrate the 3db points.

For linearity the det will require a much wider bandwidth than the IF, some better det stated around 1Mhz but it will work well with less.
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