EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: wd5jfr on December 06, 2021, 04:13:15 pm
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Just picked up a nice very, very clean one (from 1978?) and Variaced it on and seems to work except that I can't set it to display a trace but I see random pattern of dots, nice bright display with numerics. All the different settings I've tried won't make a trace.
In the PEN Function I see the spot moving up the left side of the crt then partially across the top of the screen and down.
I hope it's just a problem with the basic set up and if anyone can guide me I'd sure like to see if I can get a trace and some other functions if it's operational. On reflection I think it might be the vertical section but I hope it's my ignorance on set up.
Thanks
Hank
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Wouldn't really know and probably doesn't make any difference,
if you assume lower left is channel B, and you've set channel A as trigger.
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Thanks for looking and you are correct on both points and and figured someone would catch something.
Here's a proper setting pic.
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Amazing that it still works. I briefly used a Nicolet Med-80 and did a little programming on one around 1984. It was a few years old and waay out of date -- It was a 20-bit machine with core memory. The display was in a Tek 5000 series mainframe. There was an 8" floppy and it also had a paper tape reader. Most programs were on paper tape.
It was an odd thing - partly hardwired like a DSO and partly programmable like an old mini computer.
It did DSO stuff but mostly was used as a signal averager. The A/D module had 'scope like controls and a 50kHz sampling rate. It could also play Pong. Knobs on the Med-80 moved the paddles. Display was on the Tektronix 'scope.
(https://en.wikipedia.org/wiki/Nicolet_1080#/media/File:Nicolet_1080_a.jpg)
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Got a couple of more traces from trial and error settings. If you look closely at the dim display you can see the peaks of a squished sine wave. I hope it's a setup problem but I still think;s related to the input. Still hoping for help.
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Here's some specs:
https://testequipmentconnection.com/specs/NIC%202090%20SPECS.PDF
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Does it trigger at all?
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Yes, the trigger light flashes but I don't see anything after the flash on the crt. Sometime the trigger light will stay until I move a control but it seems to be different ones each time.
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Still looking for help.
Thanks
Han