HP54845 scope GPIB interface and Labview 6.1. Scope returns 'read timeout' when attempting event delayed triggering via labview program.

[Dr. sam]

i am using an event delay type trigger on a HP54845A scope to aquire data on channel 1.  The triggering is in the following order. 

The event source is channel4, the arm source is channel 2 and my target data in on channel 1. 

I have the setup loaded on the scope and when i use a labview program (6.1) to simply set the triggering (HP548xx configure trigger.vi followed by

HP548xx config event delay trig source.vi) and acquire the data off channel 1 it works fine. 

However when i try to program the entire operation including enabling channels 2 and 4 and setting their characteristics

before my trigger subsystem i start getting a read timeout from my read operation. i have entered in the exact values for my vertical offset etc.

for the channels that i have on my scope setup.  Additionally, i have a case structure to abort acquisition and reset scope to default

if the same error code is encountered.  although i can see the boolean for this to come out  'true'  the end result is that my scope hangs and

 i have to power off and on to get it started again.  I am using the HP54845A drivers and GPIB.  Any help in this regard is most appreciated

and will earn you a beer. 

Best Regards

Sam

[Steven Bird]

Hello Dr.Sam,

I am unfamiliar with this instrument and driver. Are on converging to a hardware of driver issue. Can you code this youself using VISA to try and rule out the driver? This will also then prove the hardware also. Have a look at the supplied VISA examples that ship with LabVIEW.

Please let me know how you get. If this is an issue with our puublished dirver then we can get this changed.

Kind Regards

Steven Bird

Applications Engineer, NIUK