[WriteLog] New User RTTY Problems

[Barry Murrell]

Hi All

Problem solved! Joe's response got me thinking - I changed over to my
onboard AC97 chipset, and everything works 100$... even had a quick QSO with
SV1GSV/8 just to make sure!!

It would appear that my SB Audigy Live PCI soundcard is the culprit...
whilst other programs (including freestanding MMTTY) are more tolerant,
Writelog has a problem with the Audigy. Guess it's back to the AC97 for
digital ops now, with the Audigy relegated to Skype!

73 de Barry ZS2EZ
(EX ZR2DX / ZR6DXB)
KF26TA - Port Elizabeth,South Africa
Member : PEARS, SARL, ARRL, SA AMSAT

-----Original Message-----
From: writelog-bounces at contesting.com
[mailto:writelog-bounces at contesting.com] On Behalf Of Joe Subich, W4TV
Sent: 24 August 2006 01:17 AM
To: 'REFLECTOR writelog'
Subject: Re: [WriteLog] New User RTTY Problems


With MMTTY the most common cause of the "overflow" indication is 
excess audio signal level to the sound card.  If you are using a 
laptop and feeding it from the speaker or headphone output of a 
radio, there is a good chance of overdriving the soundcard mic 
input.  

Some other things to check ... make sure you are not feeding audio 
from another source (other receiver?) to the unused channel if 
you have a stereo input.  If you are using a mic input add a 
series capacitor to prevent the mic bias from upsetting the radio 
(which can cause an audio spike when switching from transmit to 
receive).  Be careful with RF feedback ... even a small amount of 
RF on the soundcard mic input might overload the sound card.  Use 
an RF choke in the audio lead and try some "snap on" ferrite cores. 

73, 

   ... Joe, W4TV 
  

  


> -----Original Message-----
> From: writelog-bounces at contesting.com 
> [mailto:writelog-bounces at contesting.com] On Behalf Of Kostas SV1DPI
> Sent: Wednesday, August 23, 2006 2:28 PM
> To: REFLECTOR writelog
> Subject: Re: [WriteLog] New User RTTY Problems
> 
> 
> I had the same problem. Because i was portable I thought that it was 
> something i couldn't find.
> Setup was Kenwood 850sat, a portable HP omnibook PIII-850 
> running xp, fsk 
> with the true com port.
> The mmtty was 1.62 but it wasn't its problem as i switched to 
> writelog rtty 
> and i had the same problem. No problem with mmtty standalone. 
> Finally i run 
> the test with mmtty and made only 25 qsos as i bored with 
> mmtty (it isn't 
> the same fun as with writelog). It wasn't rf as i tried with 
> 10w and i had 
> the same problem.
> Writelog wasn't the last one but something like 10.58.
> Kostas sv1dpi
> 
> ----- Original Message ----- 
> From: "Barry Murrell" <zs2ez at axxess.co.za>
> To: "Wrirelog Mailing List" <writelog at contesting.com>
> Sent: Wednesday, August 23, 2006 8:04 PM
> Subject: [WriteLog] New User RTTY Problems
> 
> 
> > Hi All
> >
> > I am brand new to Writelog (bought last week) and am having a major 
> > problem
> > with RTTY, using the MMTTY Plugin.
> >
> > During this past weekend I set up Writelog for use in the SARTG RTTY
> > Contest.Everything looked 100%, and it worked fine into the 
> dummy load on
> > Friday night. On Saturday morning I gave my first call, and the FFT 
> > display
> > immediately changed from the usual "mountain" in the middle 
> of the display
> > to a line across the middle of the display (right across) 
> and the word
> > "overflow" in the top right. I shut down and restarted the 
> program, and it
> > came right. I transmitted again, and the same thing happened again.
> >
> > I have been experimenting with different settings since, 
> but get the same
> > problem every time. Strangely though MMTTY (free standing) 
> works 100%, as
> > does N1MM Logger with the MMTTY engine. MixW and WinWarbler 
> also work
> > perfectly.
> >
> > Can anyone offer any advice as to how to solve this?
> >
> > Station setup: PC is a 2.4GHz Celeron with 512Mb RAM, 
> running WinXP Pro.
> > Soundcard is Soundblaster Audigy Live, Interface is 
> homebrew opto-isolated
> > with PTT and FSK through COM port, radio is Kenwood TS-870S.
> >
> > 73 de Barry ZS2EZ
> > (EX ZR2DX / ZR6DXB)
> > KF26TA - Port Elizabeth,South Africa
> > Member : PEARS, SARL, ARRL, SA AMSAT
> >
> >
> >
> > _______________________________________________
> > WriteLog mailing list
> > WriteLog at contesting.com
> > http://lists.contesting.com/mailman/listinfo/writelog
> > WriteLog on the web:  http://www.writelog.com/
> >
> > 
> 
> 
> _______________________________________________
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> http://lists.contesting.com/mailman/listinfo/writelog
> WriteLog on the web:  http://www.writelog.com/
> 
> 

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