hp34970a read vi doesnot wait for scan to finish

[Dennis_Knutson]

I never noticed that your Read is inside a for loop. I'm not sure that is correct. I think you should be able to do a single read and get the results from all scans. Like I mentioned once before I think, I no longer have access to the instrument or manual. I used them for years so I'm going on memory.

[pri2686]

I want to get the reading as soon as it scans.. so i set the trigger such tht it scans once and wait for instrument to finish scan and then read it... i want to repeat this...so i used a for loop...each time the reading goes into a 1d array and i did necessary action on the readings in the 1d array.

[pri2686]

yes, we can do a single read and get the readings once of all, but as i need real time readings i kept the read in the loop....

[Dennis_Knutson]

That makes no sense to me.

[billko]

Waiting for the OPC bit to be set is a standard way to do it, but there is an alternative that uses less code and is also standard.  That is, using the *OPC? query appended to your command.  Instead of having to loop to read the OPC bit, it simply waits until anything (usually a "1") is sent to the read buffer.  As far as I know, any equipment that can do the OPC bit set can do the *OPC? query as well.

Here is a picture and a VI with connected terminals.

Bill