Oscilloscope recommendation?
 

looking at buying myself a cheap portable scope for use when teaching and troubleshooting a bot. Was originally thinking about eBaying an old HP or Tekt, but buying one sight unseen is giving me the heebie-jeebies.

Keep seeing some of the ARM based scopes (agptek, jyetech, others): does anyone have any experience with anyone of these? Should I bypass these and just get an OWON or something similar?

Requirements are 2 channels, < $200, no PC needed, fast enough to watch PWM outputs going to servos and/or motor controllers, ability to trigger (as opposed to freerunning).

(or does anyone have a good working HP or Tekt looking for a new home?)

Re: Oscilloscope recommendation?
 

wait till you find one on ebay that's close to home?

I got my Tek 2215 at the swap meet for $50, although it was a gamble. I got lucky, it works fine. It's not their best, but it is rather light weight for a dual channel 60 mhz CRT scope.

Re: Oscilloscope recommendation?
 

People have said good things about this Oscilloscope alternatively there is this one witch i will hopefully be able to review soon :D

Re: Oscilloscope recommendation?
 

You missed the summer hamfest season, but check out ARRL Hamfest search page and put your zipcode or state in. There are indoor swap meets across the winter, you may find something in your price range. Hams are pretty good about explaining what you are looking at. But as always, if it seems to good to be true, it isn't. :rolleyes:

Re: Oscilloscope recommendation?
 

If you can find a tektronix 465B oscilloscope, that is probably the best scope ever made. Yes, you are possibly taking a risk if you buy it online. And you might not find one for under $200.

There are plenty of computer based digital scopes for less than $200, do a Google search. I don't have a specific recommendation but there's several dozen options out there.

Re: Oscilloscope recommendation?
 

Meet the 502 - I had to replace the high-voltage rectifier tube but it's worked fine since I did that. :D

Re: Oscilloscope recommendation?
 

If you have a bit more cash and need more bandwidth or want more traditional controls I have a friend who bought this scope and is quite happy with it.

http://dx.com/p/rigol-ds1052e-5-6-tf...lloscope-30573

Re: Oscilloscope recommendation?
 

I have a 535 when I need to heat up the shop. About 500 watts. And not very portable.

Re: Oscilloscope recommendation?
 

Although it's a bit above your budget, I highly recommend the Rigol DS1052E. The DS1052E is considered by many to be the best oscilloscope in it's price range. It's a 50MHz scope, but can easily by hacked to operate at 100MHz :)

I have some pics on my website: http://www.foxytronics.com/blog/1/en...boxing-review/

Dave Jones' EEVBlog review: http://www.youtube.com/watch?v=kdjpb...layer_embedded

I would suggest buying directly from Rigol, however, and not DX as tsaksa linked to.

Re: Oscilloscope recommendation?
 

Did you see the DAQ for NI
Data acquisition (DAQ) is the process of measuring an electrical or physical phenomenon such as voltage, current, temperature, pressure, or sound with a computer. A DAQ system consists of sensors, DAQ measurement hardware, and a computer with programmable software. Compared to traditional measurement systems, PC-based DAQ systems exploit the processing power, productivity, display, and connectivity capabilities of industry-standard computers providing a more powerful, flexible, and cost-effective measurement solution.
Parts of a DAQ System | See a complete guide to building a measurement system https://lumen.ni.com/nicif/us/ekitdaqsys/content.xhtml

Re: Oscilloscope recommendation?
 

I think the reason DAQ hasn't been mentioned in this thread is because the OP specifically stated "no PC needed" as a requirement.

Re: Oscilloscope recommendation?
 

I just recently had a fine result buying a used Tek 2230 (100 Mhz digital storage) from ebay ($199) Yes there is some risk, the secret is taking the time to find one from a highly rated individual seller that knows its history and knows for a fact that it is in good working order. I would also recommend shopping in this generation of scope, which was before fully digital but with some digital storage functionality. A true analog trace but with storage, comparison, zooming, triggering, etc. These scopes cost $5000+ in their day but can now be had for nothing. A real sweet spot in the price/value range. Getting a modern digital scope with the same quality of signal and fequency range would cost far more than you are looking to spend.

Re: Oscilloscope recommendation?
 

I recommend this as well. Unfortunately, it's nearly $400, but it's a great scope for the price. The current revision of hardware is hackable to 100 MHz (I did it with mine I just got for Christmas).

I was also given my grandpa's Tek 475 for Christmas.

Re: Oscilloscope recommendation?
 

I am more partial to a 453. But that is because it had a better TV sync.

Re: Oscilloscope recommendation?
 

*insert jab at Al for working on TVs this day and age*

:p