topic Re: TDS5000 Delay Measurements in LabWindows/CVI

TDS5000 Delay Measurements

MattKing — Thu, 21 Jul 2005 08:20:49 GMT

I'm attempting to run a Tektronix TDS5000 scope through GPIB in Labview. While some of the functions for it work, whenever I try and use the "Read Delay Measurements" VI it returns an error

"Channel or repeated capability name required"

I can't work out what it means by this. Does anyone have experience with this problem?

Thanks

Re: TDS5000 Delay Measurements

Katherine Robinson — Fri, 22 Jul 2005 09:54:17 GMT

Hi Matt,

Please can you let me have some extra information on this? Are you controlling the TDS5000 with direct GPIB calls? Are you using a driver vi that you have written, or are you using a downloaded vi? If you have a downloaded vi, please can you let me know where you got it from?

Many thanks

Katherine Robinson

National Instruments (UK)

Re: TDS5000 Delay Measurements

MattKing — Fri, 22 Jul 2005 11:09:17 GMT

Actually, I eventually managed to resolve this particular problem (I managed to leave the simulate part of the option string set to 1 by accident, hence it was trying to read delay measurements off of a single sine wave). But was confronted by a new similar one anyway.

I am using the VIs from the Labview support site:

http://sine.ni.com/apps/we/niid_web_display.download_page?p_id_guid=E3B19B3E9185659CE034080020E74861

It now appears to not be able to see the oscilloscope at all from these VIs despite the Measurement and Automation Explorer finding it with no problems.

I've been wondering if there are different types of GPIB protocols and I've managed to pick the wrong one or something.

Any help appreciated

Re: TDS5000 Delay Measurements

Katherine Robinson — Fri, 22 Jul 2005 14:47:14 GMT

Hi Matt,

I believe that this is an issue with the IVI driver setup.

Please can you check that you have got the driver session fully set up through MAX, so that you have your hardware asset and logical names in place?

I can also look into it further from here, so please can you send me your IviConfig file from <C:\program files\ivi\Data\IviConfigurationStore.xml> so that I can look at the setup you have got.

Thanks

Katherine Robinson

National Instruments (UK)

Re: TDS5000 Delay Measurements

Katherine Robinson — Fri, 22 Jul 2005 15:20:17 GMT

Hi Matt,

One other thing that would be useful - please can you send me a screenprint of MAX with the IVI Drivers section expanded right out, so that I can see how you have that set up to be able to confirm all of your settings against the iviconfig file

Thanks

Katherine Robinson

National Instruments (UK)