Register to reply

Evaluate used Scope

by Windadct
Tags: evaluate, oscilloscope, scope, test
Share this thread:
Windadct
#1
Mar18-14, 03:34 PM
P: 553
Hello PF'ers....

I just picked up a Wittig W2022 Scope on E-bay.

I would like to give it a thorough evaluation, however, this is to be the highest precision item on the bench - does any one have some good ideas or procedures for running this through its paces?

Perhaps even an eval form?

Thanks!
Paul
Phys.Org News Partner Engineering news on Phys.org
Amazon worker piloted drone around Space Needle
Five next-generation technologies for positioning, navigation and timing
Hoverbike drone project for air transport takes off
davenn
#2
Mar18-14, 05:55 PM
Sci Advisor
PF Gold
davenn's Avatar
P: 2,469
Hi Windact

have you got or have tried to get a service manual for it ?
if not you could try here ebaman

he has masses of manuals for all sorts of gear
A manual is at least going to give you the specs the scope should be able to achieve
(taking its age/amount of use into account)

a decent quality audio sig-gen/function generator with calibrated level output
would be an essential signal source for testing any scope's performance

cheers
Dave
berkeman
#3
Mar18-14, 07:13 PM
Mentor
berkeman's Avatar
P: 40,658
Quote Quote by Windadct View Post
Hello PF'ers....

I just picked up a Wittig W2022 Scope on E-bay.

I would like to give it a thorough evaluation, however, this is to be the highest precision item on the bench - does any one have some good ideas or procedures for running this through its paces?

Perhaps even an eval form?

Thanks!
Paul
You should have a DVM that is higher precision, at least for DC measurements and sine wave RMS measurements...

Compare the DC accuracy against your DVM using your DC power supply. Then use an AC square wave source to be sure that you can compensate the 'scope probes to flat signal response.

Does the 'scope have any measurement capabilities of its own, or is it all visual measurements made by you?

Windadct
#5
Mar19-14, 08:19 AM
P: 553
Yes - I'll download the manuals- I and many have some self cal, my DMM is OK - but a few features like bandwith would be tricky.

I was thinking of something like comparing VI curve for a few standard, signal diodes. Their performance should be pretty consistent. Many times when you look at cal you are checking each parameter at once, but IMO many of the digital devices, there are often one or two "tests" that can confirm that pretty much everything is working.

Another woud be Square Wave response - both unfiltered and then filtered. By overlapping results of different test - shortcomings of the test equipment can be ruled out and attributed to the UUT.

Just thinking out loud

Also - thanks for the firmware project - it looks interesting - probably the most common issue/complaint with low end scopes is the software, but in general all software projects are far more difficult then consumers ( and many manufactures) understand. So I want / Need the PC connection - but will see how well the OEMs works and then check the FW Project out.


Register to reply

Related Discussions
Scope of PhD((or MS/PhD from US)) in A&A? Academic Guidance 13
What is the scope of these courses? Academic Guidance 4
Buying my first scope (need some help!) Astronomy & Astrophysics 10
The scope of this forum Medical Sciences 1
Mounting a 'scope on the ISS Astronomy & Astrophysics 2