I'll take a stab at it - you're not MISSING something with 3.033XA, you're
GETTING something. Noise level is proportional to bandwidth and that's
what you're now seeing. AGC threshold masked the low level s-meter action
in earlier versions of firmware. The new firmware introduced full scale
s-meter action independent of AGC threshold, so you're now able to see the
bandwidth affecting noise level.
73, Barry N1EU
On Thu, Jul 11, 2013 at 3:07 AM, AB5EU <ab5eu@wildblue.net> wrote:
> I finally decided to try 3.033XA as it advertised a fix for the rx audio
> in 3.029. Successfully updated the radio and completed the S-meter
> calibration.
> Master reset/memory clear - enabled RX-366.
> Noticed that without the antenna connected the S-meter was at S3 in USB
> mode. Further investigation determined it was not mode specific but
> bandwidth specific.
> Above 2.4khz = S3 resting level, 2.4 to 1khz = S2, Below 1khz to 100hz S1
> to S0.
> No difference between the main or sub (rx-366) receiver.
>
> Observed the noise floor with SpectrumLab so its not just the S-meter.
> Went back to 3.029 and all is well.
> No noise or S-meter reading at any bandwidth. Am I missing something with
> 3.033XA?
> - Trevor AB5EU
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