--- In FMtuners@yahoogroups.com, "sedond" <dsedon@n...> wrote:
hi all,of "10hz
to 50khz (before de-emphasis)". what's this mean? (19khz & 38khzHi- they are talking about the "composite response" of what the
demodulator (ratio detector - quad detector) is, including any
effects from the IF strip.
The response should be as linear as possible from just a few Hz to 70
or 80 kHz for best stereo separation, and fidelity.
A typical late model analog FM exiter will have a frequency response
of +/- 0.5 dB 2Hz to 100 kHz, with no more than 1 degree of phase
error. That will make it possible to transmit a signal with 65 dB of
separation at 1 kHz.