SNAP? command

[Dana_9]

Hello,

I am trying to collect more than one value at a time using SR810 using the "SNAP?i,j" command (data transfer Command). I connect this to GPIB Write.

But it is not reading 2 values. Is this command correct for GPIB wite? or do I have to use "OUTP?" command?

Thanks!

[systemcrash]

go through your device guide to which you  want to communicate, and just in case check manual page 99 for detailed description.

[Dana_9]

Thanks.... So if I give SNAP?1,2,4,9 ...I expect values like" 1.2e-8,3.0e-8,60,20" as output. But my output is simply

"1.2e-8,". Other values are missing.

If I give SNAP?9,9 (...asking reference freq twice)..it gives "20,20".

Then If  I give SNAP?9,9,9.....ouptput is "20," .......which is again missing numbers after comma.

I am not sure if byte counts in GPIB read is causing problem...