Electronics > Repair
HP 1980B Oscilloscope troubleshooting and repair
woodchips:
I have a couple of these, and also a full set of manuals from Manuals Plus, and still can't work out what it is for.
It is a 100MHz analogue scope, but what is the point of all the digital stuff? Is it only to draw envelope diagrams on the screen for someone to check that the displayed waveform is inside the envelope? I have had a good search in the manuals and can find no details of whether it can digitise the actual waveform? What is the point of having deflection factors of 276mV/div or 101us/div? Strangely I have a flyer describing printing or plotting the screen, static as well as dynamic traces, so how were they captured? This printout also has strange calibration per division settings.
The good news is that by searching I found
emperoroftestequipment.weebly.com
which has a review of many pieces of test equipment, spent a good couple of hours reading it so far and not finished.
One 1980 was dead, one sort of works. Even with the manuals how do you get the sort of X and Y plug ins out? Had to near dismantle the whole scope and then the cables needed a steel fingered hand 2" wide for access. They are sort of plug ins because they have no release catch and then pull out as in every other scope. They are just front panels, but screwed to the main analogue board in the bottom of the scope. To get at the eleastomeric connections all this has to be dismantled. Seems a waste of time to me!
Cubdriver:
The 1980s have been on the back burner for a while now, unfortunately, due to other projects and simply a general lack of time and motivation. I hope to get back to them again as winter rolls around. I e the meantime, I have plumbing and heating to get finished before the snow flies.
Thanks for the interesting link - that was a good read (still more to go, too), though his tastes seem to run to more 'modern' gear than mine generally do. He needs to get a 3439A, 3440A, 3450A and 3460B for his voltmeter collection, and he's missing a bunch of counters as well. ;)
-Pat
woodchips:
Yes, finished after three nights of reading.
I wonder how much time he spent on fixing it all, lots of hours it seems.
Seems to have missed that the 3581 wave analyser looks amazingly like the 3580 spectrum analyser. In fact if you use the 3581 self scan mode it is a not bad audio spectrum analyser. And cheap! No one knows what a wave analyser is now.
fred-bloggs:
Dear Sir - Although some time as passed i was wondering if the HP1980B Oscilloscopes maybe available For Sale ? Regards Marc
Oldtechman:
Hi there I am new to this site. I just received my hp 1980b oscillscope of course it came from ebay. So far I have been lucky everything seems to work accept the trace intensity is to high. I have the big book for this scope and tells me how to adjust the limit for the trace signal. Now the kicker it doesn't say where the controls are. Any help would be appreciated.I have been in electronics since 1978. Use to work on Tvs. I worked for the Navy for 30 years. I am now retired. I still tinker with electronics repairing old computers and now I moved to test equipment. My hobby keeps me out of my wife's hair. I would like to say hi to everyone. Cubdriver you inspired me to join this forum thank you.
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