Hi,
I remember now that in the late 90's I'd a similar problem with my 496P.
I was using the Tektronix software GRASP and I remember well that I was obliged to leave all the back panel switch to OFF except the ones concernind the GPIB address.
When I was switching the dip switches to Talk or Listen the analyser did responded to the software. All the switch had to remain off except the address!
Don't as me why I don't have anymore this rig. May be the software is still somewhere on my pc or the archive!
Have a wonderfull week end trying to make it working!
pf, F5BQP
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----- Original Message -----
From: John Pavelich
To: TekScopes@...
Sent: Saturday, September 13, 2008 2:09 PM
Subject: [TekScopes] More Tek 494P GPIB help needed
Hi
Thanks for all the helpful suggestions I received earlier but my Tek
494P spectrum analyzer GPIB still does not respond and I could use
some help.
I took the GPIB board out of the unit (fairly easy job) tested the
DIP switch with a multi-meter, it seems to respond fine. I cleaned
the ribbon cable connectors and they seem ok.
I checked for DC power, and I have about 5 volts to the GPIB board.
However the 494P still does not respond to any GPIB switch settings.
What would the group suggest that I do next?
Is there a way to test for signals on the GPIB board to see if the
board is functioning? I assume that if I can test the GPIB board and
it tests ok, then the problem is somewhere between the board and the
analyzer - but where?
Cheers
John
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