It might be a matter of terminology, but the technique actually involves
RAISING the AGC Threshold so that gain compression only kicks in on the
strongest signals and there's a linear gain curve for everything below that
level. From s1 to s9 is a delta of ~48dB, so a full implementation of
K3NA's advice (with HIGH headphone isolation) would involve a threshold set
above s9.
73, Barry N1EU
On Tue, Oct 13, 2015 at 8:18 PM, W5JR Mike <w5jr.lists@gmail.com> wrote:
> That's exactly how I set mine up. Lower the AGC-T to where the band noise
> and weak/moderately weak signals aren't hitting the threshold. So maybe
> S4-5+ signals do hit the threshold. I'm able to still hear the "at noise
> floor" signals without pain in the ears from strong signals. They're loud,
> but manageable.
>
> tnx
> Mike / W5JR
> Alpharetta GA
>
> > On Oct 13, 2015, at 6:25 PM, Stephen Hicks, N5AC <steve@flexradio.com>
> wrote:
> >
> >> On Tue, Oct 13, 2015 at 3:56 PM, Barry N1EU <barry.n1eu@gmail.com>
> wrote:
> >>
> >> But my main
> >> point here is that a high end xcvr vendor should hopefully not hamstring
> >> the receiver AGC with a lower dynamic range and prevent such techniques.
> >>
> >> Thanks for listening & 73,
> >> Barry N1EU
> >
> > You can certainly adjust the levels to whatever suits you -- I threw
> 40dB
> > out as a typical number. For more dynamic range, you can lower the AGC
> > threshold. You can, of course, turn it off and have the full dynamic
> > range, but I don't know of anyone that would find this comfortable.
> >
> > 73,
> > Steve
> >
> >
> > Stephen Hicks, N5AC
> > VP Engineering
> > FlexRadio Systems™
> > 4616 W Howard Ln Ste 1-150
> > Austin, TX 78728
> > Phone: 512-535-4713 x205
> > Email: steve@flexradio.com
> > Web: www.flexradio.com
> > Click Here for PGP Public Key
> > <https://sites.google.com/a/flex-radio.com/pgp-public-keys/n5ac>
> >
> >
> >
> > *Tune In Excitement™*
> > PowerSDR™ is a trademark of FlexRadio Systems
> > _________________
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>
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