[Elecraft] P3 bug

[Vic Rosenthal]

I just tried it with an external keyer. Same results.

On 29 Dec 2014 23:07, Joe Subich, W4TV wrote:
>
> Have you tried using an external keyer?  I can not reproduce the bug
> here but I'm using an external keyer.  Perhaps the internal keyer adds
> enough stress to the processor to cause a delay that exceeds a "knee".
>
> 73,
>
>      ... Joe, W4TV
>
> On 2014-12-29 4:01 PM, Vic Rosenthal 4X6GP/K2VCO wrote:
>> Right, but I conclusively proved that this is not the (only?) cause by
>> reproducing the bug without any applications running on my computer that
>> access the K3.
>>
>> On 29 Dec 2014 22:58, Joe Subich, W4TV wrote:
>>>
>>>> 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.
>>>
>>> N1MM Logger (both Classic and Plus) is extremely aggressive in its
>>> polling - something like 7 or 9 "GET" items - including FA; FB; and IF;
>>> all at once every 300 ms. Add a second polling source - e.g. the P3 -
>>> and the chance of collision, timeout, and/or buffer overflow gets
>>> fairly substantial rather quickly.
>>>
>>> 73,
>>>
>>>    ... Joe, W4TV
>>>
>>>
>>> On 2014-12-29 3:32 PM, 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
>>>>
>>>>
>>>>> -----Original Message-----
>>>>> From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of
>>>>> Jim Brown
>>>>> Sent: 29 December 2014 17:09
>>>>> To: elecraft at mailman.qth.net
>>>>> Subject: Re: [Elecraft] P3 bug
>>>>>
>>>>> 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
>
>
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-- 
Vic