Anyone use these? Any recommendations good or bad? I am looking at some that have Scope, Meter, Spectrum Analysis, etc. Are the "multi-use" type PC scopes any good? I see some that are down around $200-300? which is in my price range.
Thanks!
Jim Douglas
Depending on what you are trying to measure, they can be a very usefull tool. A "real" scope is much better, but much more expensive. IF you can, try before you buy. At the very least get to do a hands on demo. I use several different audio applications for a variety of my measurement needs. For the serious stuff, I borrow a good scope from work. The biggest "flaw" is they average the readings, so if what you are looking for is a rarely occuring gltich, a most PC scoes will miss it. For looking at normal waveforms they do a respectable job.
Terry
This one is free. It's only 20khz, though.
Scope and logic analyzer..
mike
My gut reaction when I see a PC-based O-scope is to cringe.
I would stay away from them. For the same price range that you mention, you could get one heck of a nice Tektronix 7000 series 'scope, or perhaps a 400 or 2400 series portable, all from the used/surplus arena (more specifically, from ham radio swap meets or Greed-Bay).
Example: The Tek 7603 was one of their most popular, and is also one of the most plentiful on the surplus market. It has a mainframe bandwidth of at least 100MHz, and can often be found for around $50-$100 with plug-ins.
If you want some serious bandwidth, you should have a look at the Tek 7904 or 7104. The base frames have bandwidths of 500MHz and 1GHz, respectively, and you should be able to get a good 7904 with plug-ins for a little over $300.
Your test equipment needs are, of course, your choice. However, I would like to say that just because a test instrument CAN be designed to work in a PC environment does NOT always mean that it SHOULD be. Good- quality input stages are hard to do (there's a reason Tek put so much R&D into theirs), and they are one of the main driving factors where cost is concerned.
I have little faith that the Taiwan-import PC-based (alleged) O- scopes can do a proper job in this regard. Good quality test gear is an investment, and it should be treated that way.
Keep the peace(es).
-- Dr. Anton T. Squeegee, Director, Dutch Surrealist Plumbing Institute. (Known to some as Bruce Lane, ARS KC7GR, kyrrin (a/t) bluefeathertech[d=o=t]calm -- www.bluefeathertech.com "If Salvador Dali had owned a computer, would it have been equipped with surreal ports?"
There's one major advantage to the PC based scopes. It's STORAGE of waveform. When I was younger we had to put a hood over the front of the scope and use a Polaroid to get shots of easy to miss signals.
A real storage oscilloscope costs a fortune, but if you can get a PC variety that fills your frequency needs, I'd go for it. Three or four hundred bucks is a bargain when accompanied by a good warranty..
mike
variety
bucks
Good post you Canuck!! Your all right tech wise :)
-- 73 and good DXing. Brian ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A lot of radios and 100' of rusty wire! Zumbrota, Southern MN Brian's Radio Universe http://webpages.charter.net/brianhill/ EMAIL- brianehill@$100charter.net (Hide the $100 to reply!)
Some of them aren't too bad, although in the $200-300 range you'll not get any record setters. For one data point, though, some of the higher end scopes do use Windows as their user interface. Check out Tek's TDS6000B at
For one possiblity closer to your price range, take a look at
-- Rich Webb Norfolk, VA
I love damnation by faint praise. It's a good thing you haven't heard me trying to practice this bass. You'd retract that
EADG EADG I mean. sheesh..how hard can it be? I'm starting to suspect they shipped the wrong instructions with it, not that it matters, I can't speak Chinese anyway.
mike eadg eadg
They are too limited to be worth the money. Get a used Tek in good working order in that price range, as another poster mentioned.
Ed
Tektronix DSA602A Digital Signal Analyzer. All kinds of waveform storage and analysis, and a floppy drive as well. Runs about $400-$500 on the used market, uses 11-series plug-ins, mainframe bandwidth of
1GHz.
And how long will it last? If it's made up entirely of custom parts, and cannot be repaired by the end user (at least at the module level), then I would hardly think of it as a good investment.
When I buy test equipment, I expect it to be serviceable for a MINIMUM of ten years. Very few items that I've bought new have measured up to that requirement.
-- Dr. Anton T. Squeegee, Director, Dutch Surrealist Plumbing Institute. (Known to some as Bruce Lane, ARS KC7GR, kyrrin (a/t) bluefeathertech[d=o=t]calm -- www.bluefeathertech.com "If Salvador Dali had owned a computer, would it have been equipped with surreal ports?" ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! >100,000 Newsgroups ---= East/West-Coast Server Farms - Total Privacy via Encryption =---
You make some valid points, but I still have concerns. Tektronix, among many others, has been known to use proprietary chips/components in their scopes. These may be getting hard to get. That would tend to even out the decision making process, all other things being equal.
Having said that, Tektronix stuff is very nice, quality made merchandise. I'm admiring a 7B92A dual time base module even as we speak. I just don't want to wind up like Hamlet...
Alas, poor 7904, I knew it Horatio...
mike
??? He said his budget is $200 - $300, and he can buy a older Tek or HP 100 MHz dual trace 'scope for that kind of money.
Dale H. Cook, Chief Engineer, WWWR Roanoke VA, WCQV Moneta VA, WKBA WZZI Vinton VA, WKPA WLNI WZZU Lynchburg VA, WMNA/WMNA-FM Gretna VA, WOWZ Appomattox VA
Same here, but I carry very little that I've bought new. Most of what I have bought new, and use on a regular basis, was bought 10 - 20 years ago. The newer items that I carry are mainly ones that did not exist, or that I did not need, 10 - 20 years ago, such as my CAT5 tester.
The instruments that I use for work have to be rugged and reliable, as they live in my Explorer and frequently travel up rough mountain roads to transmitter sites. My road 'scope is a 30+ year old Tek 453, although the probes are fairly recent. I have, however, replaced my HP audio generator and distortion analyzer, both only slightly newer than the Tek, with my laptop equipped with a USB audio card and audio generation/analysis software.
Dale H. Cook, Chief Engineer, WWWR Roanoke VA, WCQV Moneta VA, WKBA WZZI Vinton VA, WKPA WLNI WZZU Lynchburg VA, WMNA/WMNA-FM Gretna VA, WOWZ Appomattox VA
Thanks for all the input, I am going to pass on the PC stuff and shop EBay and ?? for a good used scope. Any recommendations other than EBay?
that
My personal preference is a conventional benchtop scope for high frequencies, and a sound-card-based PC scope for audio work. I use my own Daqarta shareware for the PC scope (shameless plug). It only runs in real-mode DOS on old ISA-bus systems with Sound Blaster cards (or lab-type boards, which are pricey). I run an old cast-off 16 MHz 386 system that works just fine for this purpose.
The PC gives me real-time spectral analysis, which is great for distortion measurement and especially for distortion adjustments. Another big advantage is that the PC can generate complex test signals and keep them exactly in sync with the input signal that is responding to those signals, so you can use signal averaging to measure noise *way* below the noise floor.
Windows-based version is under construction, but won't be released for several months yet.
Hope this helps!
Bob Masta dqatechATdaqartaDOTcom D A Q A R T A Data AcQuisition And Real-Time Analysis
Try looking for used equipment from leasing companies.
Also look for plant closings that may result in equipment sales or auctions.
craigm
There are several places around the internet that sell reconditioned test equipment. You might end up spending a bit more than at ebay but you (should be) getting something that has been cleaned, op tested, and has all of its parts. Possibly also a better warranty.
There are a jillion out there, but a couple that I get periodic catalogs from are:
-- Rich Webb Norfolk, VA
PC scopes "can" be good, but you'll pay thru the nose for one. The cheapo ones are way less capable than a standalone except in specific narrow applications.
Ham radio swap meets are the best places to buy used scopes. Tektronix 7000 series is an excellent place to start. Plugins can be had on EBAY, but mainframes are too heavy to ship safely/affordably. Portables like 453, 465 are also excellent scopes. Make sure you get manuals. If you have to buy used manuals, they'll cost you more than the scope. Ditto for probes.
If you have an urgent need and are losing money cause you don't have a scope, by all means go see a used equipment dealer. You'll pay 10X the price, but you might get a reliable scope. If it's a hobby application, go to some swap meets. Buy the best scope you can for $20. Keep your eye out for a killer deal on a TEK or HP scope to replace it. They are available cheap if you're vigilant.
I have a killer TEK TDS540 for sale at the link in the sig. It's $2K and that's still 25% of what you'd pay at a used dealer. You don't even want to know what they cost new. mike
-- Return address is VALID. Wanted, PCMCIA SCSI Card for HP m820 CDRW. FS 500MHz Tek DSOscilloscope TDS540 Make Offer http://nm7u.tripod.com/homepage/te.html Wanted, 12.1" LCD for Gateway Solo 5300. Samsung LT121SU-121 Bunch of stuff For Sale and Wanted at the link below. http://www.geocities.com/SiliconValley/Monitor/4710/
Sure. Check
If you've never been to such an event in your life, I would (SHAMELESS PLUG ALERT) take a look at an article I wrote on my own page at this link:
This is a guide to scrounging at both surplus places and swap meets. I hope you find it helpful.
Happy hunting.
-- Dr. Anton T. Squeegee, Director, Dutch Surrealist Plumbing Institute. (Known to some as Bruce Lane, ARS KC7GR, kyrrin (a/t) bluefeathertech[d=o=t]calm -- www.bluefeathertech.com "If Salvador Dali had owned a computer, would it have been equipped with surreal ports?"
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