Electronics > Beginners
Nicolet 3091 o'scope any good?
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rstofer:
I have had scopes with lesser bandwidth.  We all push for high bandwidth to be able to view square waves where we need, perhaps, 9 times the fundamental frequency.  A 100 MHz scope is marginally capable of displaying a 10 MHz square wave.

But, thinking of audio and sine waves, 300 kHz is pretty reasonable and there is a lot of digital going on at less then 30 kHz.

If it is cheap enough, it might serve you well while you save up for one of the entry level Siglents SDS1102X-E, SDS1104X-E, SDS1204X-E or the Rigol DS1054Z.

tggzzz:

--- Quote from: rstofer on September 26, 2019, 10:43:05 pm ---I have had scopes with lesser bandwidth.  We all push for high bandwidth to be able to view square waves where we need, perhaps, 9 times the fundamental frequency.  A 100 MHz scope is marginally capable of displaying a 10 MHz square wave.

--- End quote ---

... and incapable of displaying a 1Hz signal with 1ns width. In a digital circuit such signals are exactly as important as a 10MHz square wave.

In other words, who cares about the special case of square waves - the only relevant time parameter is the risetime.
DFC:
You know,I was thinking about this.For what I do,the bandwidth of this scope seems perfectly reasonable.It has
all the features that I've wanted and envied for a long time now.The resolution is also pretty amazing especially
considering its age.Of Course,a modern scope does all this and more but if it suits my needs,why spend money that
could be used for other equipment?At least for now.
I've always had a soft spot for older equipment,I've also always had a soft spot for older women but that is a whole other can
 of worms and the two should not be confused.
Could someone post a link to the TME thread?I have looking but 12 hours night shift takes a toll on the mind.Thanks.
MadTux:
Remember those Nicolet scopes from years ago, when I bought my first scope. Not so much affordable available back than, I had the choice between Tek 7603/7D20 and some weird Nicolet scope, probably a 4094A. I wisely chose the Tek.

Just looked at the specs, the weird thing with those scopes is that the ADC/digitizer is inside the plugins (unlike e.g. Tek7854), so bandwidth/sample rate depends on what kind of plugin is installed.

Plugin specs are hard to find, the info I've gathered so far:
4175: 8bit,  50MSample/s, 16k memory, 75MHz single ended amp, 100mV-40V/div
4562: 12bit, 2MSample/s, 16k memory, differential amp
4570: 12bit, 10MSample/s, 16k memory, differential amp
4580: 8bit, 200MSample/s, 16k memory, 100MHz single ended amp, 100mV-40V/div
4581: 15bit, 100kSample/s, 16k memory,  differential amp
F43: more (much so) or less useless floppy disk recorder, probably very expensive back then ;D
DFC:
Dont know.Going off of the manual,it seems the the specs listed in there is what you get right off the bat with just the probes.Add on bits and pieces for this scope I would imagine would be rare and hard to find.
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