[Linux-gpib-general] Agilent 82357B repeatable hard failure

[Jim H. <ji...@ov...>]

Hi Everyone,

I have had mixed results using an Agilent 82357B with Ubuntu 22.04. I 
have had
success using it to capture screen prints from a Tektronix DSA602A scope.

When I tried to use it to backup the calibration data on an HP 3478A 
multi-meter
I got  a repeatable hard failure.  The process of reading the 
configuration data
sends commands like "W1" to the meter where the digit 1 in the example 
is a binary
byte value selecting which location in a 256 nibble ram to return. There 
are some
offset values which cause an immediate failure.  I can reproduce the 
failure using
ibterm.  I can send "W1" commands without problem but if I send a "W4" 
subsequent
commands will all receive EBUS errors.  I can recover from the failure 
by unplugging
and replugging the Agilent 82357B USB cable.

I have also tested with a Measurement Computing PCI GPIB interface and can
read the HP 3478A calibration correctly.

I'm posting here in the hope someone else has already solved this problem or
has suggestions on how to debug.

I would also be interested in hearing from anyone with the same setup
if they can reproduce the problem.

Jim Houston