Debug Filter/Modulator board
Posted: Sun May 12, 2019 4:13 pm
Hi All
I'm debugging a FM board from another Portsdown and am very nearly there....
The only remaining issue is when the SR is >=1000 (and using LC filters) the output spectrum looks like this:
Can someone cleverer than I point me at the part of the circuit I need to be checking?
I'm stuck!
Thanks very much - any pointers appreciated.
Mark
G0MGX
I'm debugging a FM board from another Portsdown and am very nearly there....
The only remaining issue is when the SR is >=1000 (and using LC filters) the output spectrum looks like this:
Can someone cleverer than I point me at the part of the circuit I need to be checking?
I'm stuck!
Thanks very much - any pointers appreciated.
Mark
G0MGX