Tags: 8753b, analyzer, connected, drivers, example, gbip, gpib, included, labview, network, old, programming, timeout, visa, working, write

VISA Write timeout with GBIP

On Programmer » LabVIEW

1,195 words with 0 Comments; publish: Sun, 18 May 2008 20:31:00 GMT; (200109.38, « »)

We have an old HP 8753B Network Analyzer that is connected through GPIB. I'm

trying to get it working with an example included in the drivers found on N

I's site. Communication is working, the initialize VI and a save/recall stat

e VI both execute fine. How

ever, the next VI to run simply sends one command which is only 5 characters

long to VISA Write. This Write will timeout after 10 seconds and return a "

Timeout expired before operation completed" error.

Any idea what would cause this half way through an example program? I've bee

n searching and I see things about sending large amounts of data causing thi

s error, but we're only sending one small command.

Also, there used to be a different VI before the current one that causes a p

roblem and that would return the error. It seems as though anything that fol

lows the save/recall state VI fails.

I don't know much about GPIB, but I'm thinking that the save/recall state VI

is somehow making the instrument hang up and then when I call VISA Write in

any VI afterwards, the handshaking that is supposed to occur fails. Does th

is make sense?

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