[App_rpt-users] Something is rotten in the state of Denmark

[Tim Sawyer]

Yep, lots of radios don't have enough high frequency noise at the discriminator output to work with USBradio (or and RTCM) but squelch themselves just fine. In that case you must use COR. And if you use COR you may as well use SimpleUSB. 
--
Tim
:wq

On Mar 30, 2013, at 6:33 PM, Ken <ke2n at cs.com> wrote:

> I suppose it could but that would make no sense because the receiver uses
> this high freq noise to operate its own squelch. You may want to play with
> the squelch setting a bit.
> 
> GeorgeC
> 
> A typical hardware squelch, using, for example, the MC3361, takes the output
> of the discriminator puts it though a small capacitor (which acts like a
> high pass filter) and runs it through a "noise amplifier" before applying it
> to the level detector.  The discriminator output of this same detector
> circuit taps off before the noise amplifier and will likely have some low
> pass filtering - intended to scrape off the 455 kHz AC - but probably will
> reduce the level of signals in the 10-20 kHz range somewhat...
> 
> 
> Ken
> 
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