[Linrad] Re: RX overrun error

[Jan Karel <gmail.com; ok1vao@xxxxxxxxxxxxxxxx>]

Hello Joe,

I have to apology for not fully correct information in my previous e-mail. When I started to try MAP65-IQ I used my old laptop, AMD Turion, 512 MB RAM and XP. MAP65-IQ works well, no problem. Then I tried MAP65 and I have problem I described earlier. I notice that 512 MB RAM is not sufficient for MAP65 and I tried my new notebook with Intel Dual 2 Core, 4 GB and Vista. I started again with MAP65-IQ and it looks fine so I went to MAP65. I tried today again MAP65-IQ on this notebook and there is problem with MAP65-IQ as well. MAP65-IQ receives data from Linrad with no problem, Drop 0.00%, but the very first decode somehow freeze the main window, the clock stops and no other decode. I can open for example options etc. It only stops clock, Moon and Sun data and no more decode lines in In the configuration window are the following messages:

******************************************************************
MAP65-IQ Version 0.9 r1116, by K1JT
Revision date: 2009-04-10 09:28:35 -0400 (Fri, 10 Apr 2009)
Run date:   Thu Aug 27 21:06:14 2009 UTC
Using Linrad for input, PortAudio for output.
Will accept unicast data from Linrad.

Audio    Output    Device Name
Device  Channels
----------------------------------------------------------
   4       2       Microsoft Sound Mapper - Output
   5       2       Speakers (Conexant High Definit
   6       2       SPDIF Interface (Conexant High
   7       2       Line 1 (Virtual Audio Cable)
   8       2       Line 2 (Virtual Audio Cable)

Default Output:  4
Requested Output:  8
Opening device 8 for output.
Audio output stream running normally.
******************************************************************
Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\k1jt\svn\wsjt\map65iq\buildmap65\out1.pyz/Tkinter", line 1345, in __c
all__
  File "C:\k1jt\svn\wsjt\map65iq\buildmap65\out1.pyz/Tkinter", line 456, in call
it
  File "<string>", line 1178, in update
  File "C:\k1jt\svn\wsjt\map65iq\buildmap65\out1.pyz/Tkinter", line 1139, in con
figure
  File "C:\k1jt\svn\wsjt\map65iq\buildmap65\out1.pyz/Tkinter", line 1130, in _co
nfigure
TclError: invalid command name ".38032848.38033008.38033168"

Waterfall continues and every minutes show new lines, clock on waterfall windows shows correct time. 

I checked it again on old AMD Turion notebook and MAP65-IQ still works well. All description of problems with MAP65 were correct.

vy 73 Jan

On Thu, Aug 27, 2009 at 4:46 PM, Jan Karel <Hello Joe and others,

I am sorry for bandwidth, but I am starting to be desperate.

I changed the fft to MMX (16 bits) and I can set the RX level from about -14 to +18 dB by volume control of a sound card. Unfortunately the problem persists. Red No Rx data is irregularly flashing in about 1 second interval. Meantime there is no dropped packets. It realy looks like network problem. I also tried single PC configuration - local loop 127.0.0.1, but it looks very similar. Windows reports CPU load bellow 30 % when both Linrad and MAP65 is running on the same configuration.

Is there a big difference in LAN load (I/O requests) between MAP65-IQ and MAP65? I am asking because MAP65-IQ works fine with default par files. Can you send me your par files to get some ideas if I haven't mess anything in Linrad?

Will it help if I send you the file and messages that windows show when program crashed? It reports APPCRASH event in the module Audio.pyd

73 Jan

On Thu, Aug 27, 2009 at 4:11 PM, Jan Karel <ok1vao@xxxxxxxxxxxxx> wrote:

Joe,

I will try to change fft2 to MMX and see if I can get RX levels close to 0.

73 Jan

On Thu, Aug 27, 2009 at 3:40 PM, Joe Taylor <joe@xxxxxxxxxxxxxxxxx> wrote:

Hi Jan,

> Thanks for your reply. You ask if RX level that MAP65 shows is close to 0,
> no it is not. It is very high, about 65 dB.
>
> Is this the problem?

Well, it is certainly *a* problem.  Hard to say, yet,
whether it's *the* problem.

I suspect it means that you have not chosen a fixed-point
FFT for the second FFT.  Off the top of my head, I forget
the version numbers that Leif uses here; but whatever
version you are now using -- I think probably a
floating-point one -- change to another.

When I'm home again I will check the FFT versions I'm
actually using.

       -- Joe

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