DAX JT-65 Issues

Bill W2PKY

I run my radio continuously and notice that after a day or so the DAX audio signal has a static like sound along with the tones and the base line of the side bands are elevated on the panadapter. Simply stopping the DAX service with the Task Manager and restarting cures the problem. Before the DAX MON feature was available have seen the issue on the panadapter. Now the MONitor feature reveals the clicking/static sound along with the tones. 

Additionally, if all the the slice speakers are muted the DAX MON feature does not work. Although I love the tones, my wife can do without them most of the time. Have started doing silent receive on JT-65 but would like to still hear the transmitted tones.

DV

Related to this issue.  I use Skype to connect to my remote 6700... 1600 miles distant. Audio mostly sounds okay at the remote location, except when the DAX starts making noise, static, distortion.  The fix is easy, just turn off the DAX channel, and then turn it back on and then the audio is renewed.  This appears to be a DAX related problem, but could be Skype as well. However, I thought that the DAX post above is similar to the problem I have.

Dave -- W7IWW

Doug -- I have noticed same Skype/DAX issue and resolve as you do with my 6700. Previously with Flex 5000A, I used Skype/VAC and had none of the issues mentioned. Therefore, have concluded it's probably related to DAX, and will be something that will get fixed in future software releases.

WX7Y

Same noise issue with DAX here after it's been on for 3 or 4 days with all the various programs I use. I have to shutdown DAX and then restart it so I know it's a DAX problem. I'm sure FLEX is working on this one. 73's WX7Y

DV

Tim and other Flex'er staff please look into this.  Whether its JT-65 or Skype, DAX runs for a while (less than 1 hour in my case) and then fills with noise.  Turn off the channel and it corrects the problem once you turn it back on.

Tim - W4TME

Check your DPC latency with LatencyMon (http://www.resplendence.com/latencymon)

If you are experiencing long duration DPCs (>1000 uS) then I suspect there is DAX buffer corruption happening from overruns.

Bill W2PKY

This is 3 DAX channels running. 
One channel running everything is in the green
I7 4790 4GHz 16 GiG memory
No CPU throttling system 95% idle

Jay Nation

Bill
I'm only posting these captures in case the comparison means anything.
I ran LatencyMon, for a similar length of time on a similar processor and with the same amount of RAM. My system doesn't suffer any audio glitching with DAX. Knock on wood!!! 
Jay - NO5J

Andrew VK5CV

I had similar DAX distortion problems after being on for a while in the older version but only on channel 1.

Not on 2 or 3. So I avoided 1.

No problems with the current version are apparent but I mostly use channel 2 now for long term connections rather than change it back to 1.

Give that a try.

Andrew VK5CV

Tim - W4TME

A 5800 uS DPC is about 5x times longer than the max target.  The report attached points to a video card issue.  I would recommend that you update your video drivers as a first step.  And consider a motherboard BIOS update as a 2nd step.

Bill W2PKY

Hi Tim-

Did update the Video drivers with no improvement. Will look into BIOS next. Will be away for a week.

Thanks;

Bill

Bill W2PKY

Hi Jay-

Thanks for providing this info. Hopefully I can find the problem with my system.

Will be on vacation for a week, so can not do any experiments for a while.

Bill W2PKY