33250A clock source

[RandallDC]

Hi everyone,
I'm using six Agilent 33250A function generators to generate signals for a tester.  There are tight timing constraints, so I need to have them all sync up on a single externally generated clock (coming from a PXI box).

Unfortunately, in the drivers available here (ag33xxx) I cannot find an option to set the clock source.  Any ideas?

Thanks!
--Randall Cameron

[RandallDC]

Oh: Forgot to mention that I'm running LabVIEW 7.1.

[Dennis_Knutson]

I think the place to start looking to see whether the instrument supports an external clock source in the manual but I kind of doubt it. It does have support for external trigger and you should be able to wire all of the instruments together to your source to initiate the waveforms at the same time.

[Albert.Geven]

The best you can do is to look at the external input on the back of the 33250.
GPIB or any bus is simply tyo slow especially in this instrument. The 33220 is much faster but has less MHz on its output.
You could start it from extern.

[RandallDC]

I think I need to clarify a few things.  First, I'm talking about running the generators on the same clock, not triggering them at the same time.  They do indeed support this functionality.  All I'm asking is how do I tell the machine to use the external clock input after I reset it?  I'm just trying to put good programming practice to use by setting up all the necessary values programmatically when I start my software, which includes telling the device which clock to use. 

My question is not about the machine's capabilities. 

Thanks,
--Randall Cameron

[Dennis_Knutson]

If they support this functionality, then the manual should give the necessary commands. I could find nothing in the somewhat generic ag33xxx driver for this. I only have the 33120 model which does not. It's possible that the driver was written before the 33250 was available. It's possible that the author of the driver missed adding the function. It would not be the first time that a driver was incomplete or incorrect. You can create a new function and add it to the driver or just use a separate VISA Write to send the command.