Delay while using VISA with Scope USB

[Igor_SE]

Hello,

I have some problem while using VISA driver with Tektronix scope (USB).

After I am sending 3-4 commands trough the USB (each command take approximately 20ms), there is a delay of ~600ms. I doesn't metter what I am doing the delay is always there.

Its looks like some process is taking my time from the CPU. (It doesn't meter if next command is communication command or loop or any thing else).

 

Could you please tell me how can I check where this time out is coming from?

Thank you,

[Igor_SE]

I am adding NI-SPY timming:

[Scott-M]

Hi Igor,

VISA and USB are both non deterministic tools, so the timing will never be exact. The delay could be caused by any background process you have running, but it could also just be how long certain VISA commands take.

What is your application? Is it important that you remove the delay?

Scott M.