[time-nuts] hp 54600a and rs-232

Collins, Graham CollinG at navcanada.ca
Tue Apr 22 11:07:21 EDT 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
>> 
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at febo.com To unsubscribe, go to 
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>                         
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com To unsubscribe, go to 
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com To unsubscribe, go to 
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
_______________________________________________
time-nuts mailing list -- time-nuts at febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.



More information about the time-nuts mailing list