Newport ESP 300 error with Signal Recovery 7280 DSP

11-30  Source: Network gathering  Views:6 

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We bought a new lock-in amplifier (Signal Recovery 7280 DSP) for higher frequency to replace our older version (Signal Recovery 7265 DSP). There are not a lot need to be modified in our labview program since the commands are the same for 7280 and 7265.
But the error then came up. The ESP 300 always beeps to show there are some error. But I can not find out why.
Here is how we use these two devices:
Step 1. Computer read signal from 7280 DSP lock-in amplifier.
Step 2. Computer controls ESP 300 to move a certain step size of a linear stage.
Step 3. Determining whether linear stage finish the step motion or not (use command MD?). If yes, then go back to Step 1 (read signal for each step stage moves). If not, determine again until the motion is finished.
When I do highlight execution, I can see sometimes it took longer time for the step 3 to finish. And when this happened, ESP 300 would beep. The step size I was doing is very small so it should finish in a very short time. And, when I use Signal Recovery 7265 lock-in, never had this problem.
Need to be point out is before this loop from step 1-3. I had stage move to initial position, which normally need long time to move, where I also use the same commands for determining whether stage finished moving (MD?). And there are never errors or beeps.
So, I do not know where the problem comes from, seems it is the combination between lock-in and ESP 300. 
Is there anyone can help me with this problem? Really appreciate it. I bothers me so much.
Thank you. 
Hi,
Could you provide us some more details about your motion controller?  Are you just using LabVIEW to control this, or do you have some NI Motion Hardware?
Thanks,
Marti C
Applications Engineer
National Instruments
NI Medical
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