[time-nuts] hp 54600a and rs-232
Collins, Graham
CollinG at navcanada.ca
Tue Apr 22 15:07:21 UTC 2014
The scope has four choices for baud rate and otherwise is 8 databits, 1 stop bit, and no parity.
I am not sure I understand what you are suggesting with the 7E2 - set my program to use 7 data bits EVEN parity and 2 stop bits?
Cheers, Graham
-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of bownes
Sent: April-22-14 10:48 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] hp 54600a and rs-232
"Framing error" or "override" sounds like a parity or stop bit issues. Have you changed those at all? 7E2 often works when 8N1 is specified.
> On Apr 22, 2014, at 10:34, "Collins, Graham" <CollinG at navcanada.ca> wrote:
>
> Thank you Thomas,
>
> I have that document but it wasn't of much help. I spent much time over the weekend reading through the various hp documents for this scope and interfaces but it did not shed any light on the subject.
>
> Cheers, Graham
>
>
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]
> On Behalf Of Tom Knox
> Sent: April-22-14 10:28 AM
> To: Time-Nuts
> Subject: Re: [time-nuts] hp 54600a and rs-232
>
> This may help:
> http://cp.literature.agilent.com/litweb/pdf/54652-97004.pdf
>
> Thomas Knox
>
>
>
>> From: CollinG at navcanada.ca
>> To: time-nuts at febo.com
>> Date: Tue, 22 Apr 2014 07:21:22 -0400
>> Subject: [time-nuts] hp 54600a and rs-232
>>
>> While only related to time nuttery in the sense of the hp 54600a being an instrument (oscilloscope) which we nuts might use make some meaningful measurements, I am hoping that members of this list vast knowledge of many such instruments may be able to help or at least point me in the right direction.
>>
>> I recently obtained a hp 54600a digital oscilloscope in very good condition and while not a modern whiz bang high bandwidth and high speed instrument it is quite capable and compliments my old Tektronix 5440 scope quite nicely.
>>
>> My 54600a has the basic RS-232 interface module which seems to work OK. I am able to select "print screen" and send data from the scope to an HP plotter or printer - computer actually which collects the data stream and converts the hgl data into a png file using a simple script.
>>
>> However, my attempts at getting the scope to respond to commands via the RS-232 serial interface are for naught. I am using a USB to RS-232 converter and an appropriate null modem cable. I don't have a proper serial port to try however.
>>
>> When I send commands to the scope it will display "framing error" or "overrun" or "rs-232 error (113)" or "rs-232 error (118)" (I can't find either error code listed in the hp documents).
>>
>> Being able to capture a "screen dump" is my primary concern and I am able to do so, controlling the scope via rs-232 as I might using a gpib/hpib interface is only secondary but still, it would be nice to know why my limited attempts have so far not worked.
>>
>> Ideas? Comments? Suggestions?
>>
>>
>> Cheers, Graham ve3gtc
>>
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