[time-nuts] HP5386A GPIB

[Hui Zhang]

Hello Mike:
    Many thanks for useful information. The problem is I have no more information of my USB-GPIB controller, so I don't know any command of this device. I used stupid way to send my command, if I want send "DI" to increase the display digis, I will convert "DI" to HEX code, it's 0x44 and 0x49. I add 0x36 (0x36 is HP5386's address) and 0x0A in the begin and end of my command sequence separately. So my command looks like "0x3644490A0D", the command was worked. 
    but I don't know what command can set my counter to "talk" status, I am also confused on how to "initiate its read cycle".


Hui


At 2012-06-17 23:45:07,"Michael Blazer" <mblazer at satx.rr.com> 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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