<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"><HTML><HEAD><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"><META NAME="Generator" CONTENT="MS Exchange Server version 5.5.2653.12"><TITLE>RE: vrf GPIB Data Analyzer</TITLE></HEAD><BODY><P><FONT SIZE=2>I use the National Instruments GPIB NI-488.2 driver. It comes with an application called NI Spy which can monitor, record, and display the GPIB commands while your application is running.</FONT></P><BR><P><FONT SIZE=2>-----Original Message-----</FONT><BR><FONT SIZE=2>From: dan besgrove [<A HREF="mailto:dd_besgrove@hotmail.com">mailto:dd_besgrove@hotmail.com</A>]</FONT><BR><FONT SIZE=2>Sent: Wednesday, November 07, 2001 6:55 AM</FONT><BR><FONT SIZE=2>To: vrf@lvld.agilent.com</FONT><BR><FONT SIZE=2>Subject: vrf GPIB Data Analyzer</FONT></P><BR><P><FONT SIZE=2>Hi,</FONT><BR><FONT SIZE=2>I have a PC running some hidden software that controls an HP sig gen over </FONT><BR><FONT SIZE=2>the IEEE bus. Occassionally, the sig gen or PC will lock up.</FONT><BR><FONT SIZE=2>Disconnecting the PC, I can control the sig gen using my laptop and VEE </FONT><BR><FONT SIZE=2>without the sig gen locking up.</FONT><BR><FONT SIZE=2>Question : Can I somehow use my laptop (running VEE) to act as a bus monitor </FONT><BR><FONT SIZE=2>? It would sit on the bus between PC and sig gen and show the commands and </FONT><BR><FONT SIZE=2>data that are on the line. I know about the BUS MONITOR facility within VEE, </FONT><BR><FONT SIZE=2>but this application is a bit different.</FONT><BR><FONT SIZE=2>Regards,</FONT><BR><FONT SIZE=2>Dan Besgrove</FONT><BR><FONT SIZE=2>dd_besgrove@hotmail.com</FONT></P><P><FONT SIZE=2>_________________________________________________________________</FONT><BR><FONT SIZE=2>Get your FREE download of MSN Explorer at <A HREF="http://explorer.msn.com/intl.asp" TARGET="_blank">http://explorer.msn.com/intl.asp</A></FONT></P><P><FONT SIZE=2>---------------------------------------------------------------------</FONT><BR><FONT SIZE=2>This is the "vrf" maillist, managed by Majordomo. To send messages to</FONT><BR><FONT SIZE=2>this maillist, just email to "vrf@lvld.agilent.com". Subscriptions and</FONT><BR><FONT SIZE=2>unsubscriptions are done through the address "vrf-request@lvld.agilent.com".</FONT><BR><FONT SIZE=2>If you need details, just send a message containing the text "help"</FONT><BR><FONT SIZE=2>to "vrf-request@lvld.agilent.com".</FONT><BR><FONT SIZE=2>---------------------------------------------------------------------</FONT></P></BODY></HTML>
I don't think you can get the necessary speed using VEE to allow you to
capture transactions without altering the effect you are trying to observe.
Fast bus turnaround times into older bus devices are typically the problems
I see.
Because of that, I always use an external bus analyzer which handshakes at
full bus speeds connected directly to the GP-IB interface.
Not too many are available. I use the old HP59401A Bus System Analyzer,
with 32 character memory for simple tasks. More complex tasks I use the
National PCMCIA GPIB+ card in the laptop - it has a bus analysis tool. It
will do as many transactions as you want, including timing. Last week I had
it collect 1,000,000 transactions over 30 minutes to solve an obscure
problem.
National is proud of that PCMCIA card - it is around $1000.
IO Tech also makes a unit for the same purpose, I recall that it has 32K
memory.
George Tyrrell
TestDynamics LLC
Thornton, CO
georget@testdynamics.com
----- Original Message -----
From: "dan besgrove" <dd_besgrove@hotmail.com>
To: <vrf@lvld.agilent.com>
Sent: Wednesday, November 07, 2001 1:54 PM
Subject: vrf GPIB Data Analyzer
> Hi,
> I have a PC running some hidden software that controls an HP sig gen over
> the IEEE bus. Occassionally, the sig gen or PC will lock up.
> Disconnecting the PC, I can control the sig gen using my laptop and VEE
> without the sig gen locking up.
> Question : Can I somehow use my laptop (running VEE) to act as a bus
monitor
> ? It would sit on the bus between PC and sig gen and show the commands and
> data that are on the line. I know about the BUS MONITOR facility within
VEE,
> but this application is a bit different.
> Regards,
> Dan Besgrove
> dd_besgrove@hotmail.com
>
> _________________________________________________________________
> Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp
>
> ---------------------------------------------------------------------
> This is the "vrf" maillist, managed by Majordomo. To send messages to
> this maillist, just email to "vrf@lvld.agilent.com". Subscriptions and
> unsubscriptions are done through the address
"vrf-request@lvld.agilent.com".
> If you need details, just send a message containing the text "help"
> to "vrf-request@lvld.agilent.com".
> ---------------------------------------------------------------------
---------------------------------------------------------------------
This is the "vrf" maillist, managed by Majordomo. To send messages to
this maillist, just email to "vrf@lvld.agilent.com". Subscriptions and
unsubscriptions are done through the address "vrf-request@lvld.agilent.com".
If you need details, just send a message containing the text "help"
to "vrf-request@lvld.agilent.com".
---------------------------------------------------------------------