fetch multi measurement result

[Richard_2008]

Hi ,

      I'm using the GPIB card to control the instrument. Nowadays I have encountered a problem wiht multi message fetch. The problem is like this : when I issue a querry for instance "Measure EEVM ?" to VISA write , the expected result from VISA read should be multi result like"11,22,33,12,55,~~~~". However ,my vi only can fetch the first data. I have referred some example from NI, it seem we can put these data into array. Is there any other method to get the data without using the array?

[Richard_2008]

I forgot to attach my code:)

[Richard_2008]

Hi ,

         The data fetch problem has been addressed by modify format express. New problem is instrument(E4406) initial problem,the driver seems too old. Could any one give me some ideas about this problem? Thanks.

[Dennis_Knutson]

First of all, you are posting to the wrong board. You don't have an NI High Speed Digitizer. Post questions like this to the Instrument Control Board.

Second, that error is at the input to your posted VI. Something else has generated the error and whatever generated the error is an illegal command to the instrument.

Third, in your posted VI, you have a MEAS:EEVM command and then a MEAS:EEVM? query. You only need the query. The first doesn't do anything ro if it does, it's redundant.

[Richard_2008]

Hi Dennies,

                    Why I configure the measurement command:Measrue EEVM is because different number(Measure EEVM [n]) have different result. The default is 1. I think I need let the instrument known what kind of measurement result i want to fetch . So i put this command before querry.

Thanks.

Evan

[Dennis_Knutson]

I looked at the manual and the syntax is:

:MEAS:<measurement> [n] ?

The ? is not optional according to this. According to the manual:

This is a fast single-command way to make a measurement using the factory default instrument settings.