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Old 12th May 2017, 8:43 am   #21
Join Date: Sep 2005
Location: Seaford, East Sussex, UK.
Posts: 3,934
Default Re: Avantic BM611 Stereo Decoder

Although it is detecting the pilot tone, the stereo separation is very poor. I assume this is due to attenuation of the upper multiplex channel. It seems improbable that this will be IF bandwidth so my thinking is loss is in the FM discriminator or audio circuit. The 2022 siggen is only specified to 25KHz external modulation so I have some problems with test equipment.
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