> At the time, the P3 was also connected to a PC running HRD v5.0. No
> specific commands issued to HRD at the times of the AGC pop-off. I
> was not transmitting at the time it occurred either, (RF not an
> issue).
As indicated by others, this is an issue with overpolling by HRD. HRD
enables the *K2* extended response mode and then polls for AGC status
*three times in succession* with no lag between the response to one
poll and the next poll regardless of the "Refresh Interval" set in the
HRD Options.
It appears that the slight delay in data through the P3 and the poor
programming in HRD combine, perhaps with noise, to generate a false
"AGC OFF" command. One known "work around" (although with side effects
of its own) is to use LP-Bridge as a buffer between HRD and the K3.
LP-Bridge answers many of HRDs polls from its own cache and reduces
the excessive of the K3/P3.
Note - "GT;" is not the only "duplicated" poll issued by HRD. In
addition to polling for AGC three times, HRD polls for both VFOs
(FA;/FB;) twice, selected transmit VFO (FT;) twice, Bandwidth (FW;)
*five* times, Antenna selection (AN;) twice, and Power level (PC;)
twice!
73,
... Joe, W4TV
On 10/8/2011 4:51 AM, Dan Sherwood wrote:
> All,
>
> After building and installing a new P3 pan adapter on a relatively new K3, I
> notice the AGC fast or slow setting would suddenly shut off, accompanied by
> a loud, distorted blast of signal audio. Normal AGC function is
> re-established by holding the AGC button, then tapping to select fast or
> slow. That would happen after a random period of time after power up and
> sitting on a frequency, (several minutes to an hour).
>
> I did not notice this issue before the P3 was plugged into the rig. I¹ve
> run the K3 over a week, including through the CQP contest and never noticed
> this issue before. Not sure if this is a software glitch or what. With a
> Heil Pro Set on, it is painful since it is unexpected, resulting in my
> rapidly and forcibly removing the Heil Pro Set from my head!
>
> At the time, the P3 was also connected to a PC running HRD v5.0. No
> specific commands issued to HRD at the times of the AGC pop-off. I was not
> transmitting at the time it occurred either, (RF not an issue).
>
> I have the P3 right up against the right side of the K3 with only a few mm
> separation afforded by the rubber feet on the K3. I notice the K3 case is
> hotter there, as the voltage regulators are attached internally to the case.
> Should I allow some space for cooling there?
>
> Any ideas?
>
> 73,
>
> Dan Sherwood
> WA6PZK
>
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