Tektronix 2247A / 2246 - Page 1
Forum section: electronics / general

author: Rick
author_rank: Frequent Contributor
timestamp: October 20, 2012, 03:11:35 pm
content: I shall try to buy a Tektronix 2247A or 2246 if there is an opportunity in the future. Now is there a self test in those oscilloscopes? I may ask the seller to show the self test screen before buying for example... From USA to Turkey it is a long distance and returning the scope may not be easy and can be very costly;) Those analog scopes cost as much as a Rigol 1052E on ebay.

author: nctnico
author_rank: Super Contributor
timestamp: October 20, 2012, 05:42:56 pm
content: Why aren't you buying the Rigol instead of some really old junk?

author: tom66
author_rank: Super Contributor
timestamp: October 20, 2012, 05:57:30 pm
content: As far as self test, you can test the probe compensation output and display it on the screen, but that's not calibrated by any means.

author: Rick
author_rank: Frequent Contributor
timestamp: October 20, 2012, 06:36:53 pm
content: Quote from: tom66 on October 20, 2012, 05:57:30 pmOk.I have found an ebay item where it is said that it has a self test function.http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=170632907796

author: Rick
author_rank: Frequent Contributor
timestamp: October 20, 2012, 06:39:00 pm
content: Quote from: nctnico on October 20, 2012, 05:42:56 pmIs it really junk? (especially if it is working fine.)I thought it was good to have an analog oscilloscope besides a digital one... Is it a waste of money to have a good analog oscilloscope? (just asking)3:30

author: Unknown
author_rank: Unknown
timestamp: October 20, 2012, 07:00:29 pm
content: I wouldn't call a good analog scope junk. An analog scope can be a useful addition to a low-end DSO, but I wouldn't pay $400 for one unless you have some very specific requirements (eg. real differential inputs, high bandwidth, fast update rate) that are not available on (affordable) DSOs. Dave's recommendation assumed that it should cost well under $100. Just shipping from the US is very likely to exceed this. Try looking into local sources or at least countries on your side of the pond (eg. other countries in Europe).

author: Rick
author_rank: Frequent Contributor
timestamp: October 20, 2012, 07:09:07 pm
content: Quote from: alm on October 20, 2012, 07:00:29 pmOn our local market they would sell a 20 Mhz analog scope for about $270 (a new one). That's the reason why I was looking at ebay. Even the used ones are not cheaper may be $ 230. This is not a country where they manufacture these things.But I get it. May be it is not a good idea. I may buy a better DSO for the price of an analog and a low-end DSO.

author: nctnico
author_rank: Super Contributor
timestamp: October 20, 2012, 07:47:10 pm
content: My previous scope had an analog and digital mode because I was afraid digital wouldn't cut it but in the end it turned out I never used the analog mode once I got used to the digital mode. Old analog scopes have less buttons (which isn't true for the Tek 2247 anyway) and are therefore easier to use. But in the end a digital scope offers much more features like automated measurements, spectrum analyses (FFT), saving images, etc.

author: Rick
author_rank: Frequent Contributor
timestamp: October 20, 2012, 08:52:49 pm
content: Quote from: nctnico on October 20, 2012, 07:47:10 pmOk thanks.