Spectrum lab waterfall time

[james_screech]

I'm setting up a meteor radar detection system and have an issue with the waterfall view in Spectrum lab. I'm using the MetScat_dstarter_v1.USR configuration file as a starting point, and my understanding is that the waterfall should have a time line every 15 seconds. The lines are shown with a time interval shown as 15 second however there is actually about 45 seconds between the display of each line and the time drifts from the computer clock time. If I stop and re-start the sound thread the time re-synchronizes with the system time but starts drifting again. 

I'm using an old low power computer and Spectrum Lab is using between 35-40% CPU time, I'm also regularly syncing the computer time with an internet time service so the computer time is correct.

Is there anyway to get the correct time displayed?

 

James