Hello Hui,
I found that I needed:
Ag488Wrap.ibeos(devDesc, 0x040A); // 04 = terminate read when 0A = /n is
detected
as part of the initialization. Without this, the communication with my
5384A timed out.
Also, see what happens when you press the reset button when you get
error 52 while you continue to loop on ibread with a timer.
Best regards,
Ton
On 17-Jun-12 17:45, Michael Blazer wrote:
Hui,
The older instruments have a very simple command structure. You don't
need the "?" to query. Typically just doing a GPIB Read command
(ibread for NI controllers) will address the counter to output and it
will send the current reading. This can cause a problem if you request
data too soon after a setup command. You'll get the previous reading.
The "ENTER S ; N$" command just reads from address "S" into the
variable "N$".
It sound like you need the command to your USB-GPIB controller to get
it to read. The counter is probably ready to send the data, the
controller just needs to initiate its read cycle.
Mike
On 6/17/2012 10:17 AM, Hui Zhang wrote:
I have a old HP5386A counter and a OEM USB-GPIB controller(no tech
support), I use a serial port debug program to send command via
USB-GPIB to HP5386A, when I send "FU2"(Measure period) or
"DI"(increment display digis), the 5386 response the command and
worked well, the other control command in the HP's manual also worked
well.
But I don't know how to read the measure value from 5385A, in my
HP3478A mutilmeter case, I just send a "?", it will return voltage
value to software, but at 5386A, the “?” not work, I got error
message "52" on LCD panel.
I read the HP5386's manual, the demonstrates used "ENTER" command to
get measure value, but the "ENTER" is a HP-BASIC command of vintage
HP-85 computer. I don't know how to send similar command to control
my counter, can someone give me some advice? Thank you!
Hui
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