[Elecraft] P3 bug

[Vic Rosenthal 4X6GP/K2VCO]

I have just tested it with and without a logging program running. It 
happens either way.

The way I test it it to turn QSK and TX TEST on and send a series of 
groups of V's with the internal keyer at 25 wpm: VVV VVV VVV etc. It 
seems to happen from once every three groups to once in 8 or so. Usually 
the delays are about 1s. Sometimes they are longer.

On 29 Dec 2014 22:32, Ian White wrote:
>
>> On Mon,12/29/2014 7:35 AM, Joe Subich, W4TV wrote:
>>> I have never seen this but I don't have the SVGA.
>>
>> Nor have I. Perhaps an RF issue?
>>
>> 73, Jim K9YC
>
> I have the same problem and it does occur in TEST mode so it isn't RF.
> It is also a problem of long standing, not related to any recent
> firmware upgrade.
>
> The displays (both P3 and SVGA) hang at very irregular intervals, on
> average about once in maybe 10-20-30 returns to TX. Sometimes the
> displays freeze for only about a second, but sometimes for as long as 10
> seconds or even more. I also have the impression that the problem
> sometimes occurs in 'streaks' when the probability seems much higher.
>
> Unfortunately the problem cannot be created on demand, only by repeated
> TX-RX cycling, but it does not seem to happen at all with purely manual
> keying.
>
> It only happens here when the logging program (N1MM+) is active, which
> suggests it is related to traffic on the RS232 link - perhaps some kind
> of data collision which is being resolved by timeouts. I have the
> impression that the displays become more likely to hang when the VFOB
> knob is rotated while transmitting on VFO A, which will feed a backlog
> of data into the RS232 link or its buffers.  (FYI, my RS232 link uses
> the hardware COM1 port on the PC motherboard and the PC-P3-K3 chaining
> is exactly as specified in the manuals; the whole link functions
> perfectly in every other respect.)
>
> Although the problem seems to require that the logging program is
> running, it does not seem to be directly related to the source of CW
> and/or PTT. The problem occurs with manual keying and VOX, just as often
> as it does with keying from N1MM+ (DTR=CW, RTS=PTT).
>
> The same problem also occurs on RTTY but I'm not sure about SSB.
>
>
> 73 from Ian GM3SEK

-- 
73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/