Hi All,
Does anybody have a circuit diagram or know where i can find one for a =
600 Hz tone decoder, weather it be a PLL design or dedicated frequency =
to voltage converter is not important. I assume  most analog telemetry =
links use the method of a varying tone relative to seismic signals as is =
the case with my setup, I am currently using a tuned coil for  a =
freq/volt converter and are looking into other possibilities of  =
achieving this.  Regards Steve







Hi All,
Does anybody have a circuit diagram or =
know where i=20
can find one for a 600 Hz tone decoder, weather it be a PLL design or =
dedicated=20
frequency to voltage converter is not important. I assume  most =
analog=20
telemetry links use the method of a varying tone relative to seismic =
signals as=20
is the case with my setup, I am currently using a tuned coil for  a =

freq/volt converter and are looking into other possibilities of  =
achieving=20
this.  Regards Steve