Experimental Physics and
Industrial Control System

Michael Davidsaver via Tech-talk <[email protected]> · Tue, 23 Apr 2019 12:25:43 -0700

On 4/19/19 1:06 PM, Michael Davidsaver wrote:
> All,
> 
> I've come across a new (to me) oddity involving GPIB communication between
> a Keysight/Agilent E5810A GPIB to ethernet bridge, and a Keysight/Agilent/HP
> 3458A DMM.  I'm contacting Keysight support, but thought I'd see if someone
> had already run across this issue.

In the end the answer turns out to be "END".  To quote the 3458A manual.

> The END command enables or disables the GPIB End Or Identify (EOI) function.
...
> OFF  0  EOI line never set true
...
> Power-on control = OFF.

Not an intuitive default to me.

So "END;ID?", or giving a '\n' terminator to the vxi11 device_read() call, works.
(I must admit it was news to me that termChar is a vxi11 protocol feature)

It also seems that the E5810A does not return partial output on timeout.
It's EOI, termChar, or an error.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System