[WT-support] Stuttering CW

[Doug Grant]

I am a new user of Win-Test, and am having problems with "stuttering" CW. I don't have this problem with CTWin.

I am using LPT1 interface. WinXP running on a 2.4 GHz P4 machine.

The symptom is that occasionally a part of a character is extended (i.e. very looooooong dash, or a dot that sounds like a dash).

I have an IC781connected on LPT4 as Radio 2 (Radio 1 is not in operation now...).

Zone Alarm and Norton AV 2006 running (but shutting them off did not fix the problem). Disconnecting the wireless network did not help.

I read previous messages on this topic, and have verified that the port address is correct, and "never use an interrupt" is ticked.

I looked at the task manager, and there are a lot of things running. I tried changing the priority of wt.exe to real-time and it did not help.

The only process that seems to run frequently is svchost.exe, and there are several instances of it showing in the task manager.

It is worst if I have several windows open, and move one of them around the screen...the CW speed slows way down and characters get messed up. Thought maybe it was a display issue. Tried unticking the "Enable Write-combining" box in the Display section of control panel. Also played with the hardware acceleration settings for the display with no improvement.

I can only guess that something in the display handling is conflicting with CPU priorities.

Any suggestions?

73,

Doug K1DG
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.f5mzn.org/pipermail/support/attachments/20070114/b9d71059/attachment.htm