[hpsdr] Metis step attenuator hang-up

[Bill Diaz]

John,
     I have a different RX2 S-ATT problem with PowerSDR 3.1.5 and 
Angelia/ANAN-100D at times.  When it occurs I can change bands and then 
hit the TUNE button, the RX2 S-ATT goes from 0 to -31 as expected, but 
when I hit the tune button again to cease tuning, RX2 S-ATT drops to 
-20, not 0 as expected.  Seems to happen consistently when changing from 
20 meters to 40 meters and then hitting the tune button with 3.1.5, but 
previous versions seemed to have the issue on all bands, if I remember 
correctly.

     I have been successful in resolving my situation by resetting the 
database.  I finally discovered what was causing this to happen.  ME.  
If I close the PowerSDR window without hitting the power button to 
disconnect the radio etc, the next time I start PowerSDR the S-ATT -20 
problem re-appears.  Old habits die hard and I keep closing PowerSDR 
with the windows X button, and have to reset the database the next time 
I start PowerSDR.

Bill KC9XG

On 6/26/2013 11:45 AM, H.A.Meijer wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
>
>
> Hi John,
>
> I'm seeing sometimes same things at my Alex filter boards when going 
> from TX to RX.
> But also sometimes  I see that when going from RX to TX that not 
> always the 31dB attenuator is switched on in a correct way,
>  you can see this at the panadaptor  . (I did put the 31dB att on when 
> TX, to prevent rx overload in the setup).
> So maybe a timing problem at the spi data bus to the LP/HP filters?.
>
> Bert
>
> Op 26-6-2013 17:25, John Ackermann schreef:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> I operated my TAPR-built Hermes, ANAN-10 amp, and TenTec 714 100W amp 
>> for Field Day.  The software was mRX FFT 3.0.16 running on a Lenovo 
>> X200 laptop with Core2 Duo P8600 2.4 GHz CPU and 4GB RAM.  The OS is 
>> Windows XP with current updates.  I'm running at 192ksamples with 
>> default buffer sizes.
>>
>> Things generally worked just fine -- in fact, excellently, but I 
>> noticed one anomaly and wanted to see if this was a known issue, or 
>> if there was a fix.
>>
>> Several times the step attenuator got stuck at 31dB in receive mode.  
>> I noticed this under at least two circumstances: (a) a failed 
>> software start, where I hadn't let the IP stack do its thing before 
>> starting the radio, and then having to re-start PowerSDR, and (b) 
>> sometimes when returning from TX to RX in CW mode.  When it happened 
>> on the TX/RX transition, I usually heard some noise bursts on the 
>> monitored audio during the TX period.
>>
>> The CPU load shown by PowerSDR seems to stay in the 30% range, and 
>> there are no other apps running.  Is what I'm seeing likely to be a 
>> bug, or a resource deficiency?  And are there any suggested fixes?
>>
>> Thanks!
>>
>> John
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