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Test Equipment Anonymous (TEA) group therapy thread

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tggzzz:

--- Quote from: Specmaster on June 01, 2018, 09:50:37 pm ---TBH I would have expected the DSO to have been the cleaner image seeing as it set to a higher v/div, lifting it further away from any background noise factor :-//

--- End quote ---

Er, no, except at the most sensitive range.

DAC is fixed number of bits, and screen height is a fixed number of pixels. In low-end scopes you get one (DAC) bit resolution per pixel whatever the volts/div or volts/pixel.

tggzzz:

--- Quote from: tautech on June 01, 2018, 09:53:00 pm ---Small difference; lowly DSO vs TOL professional CRO, fair comparison do you think ?  :palm:

--- End quote ---

That's only one comparison, and not a very enlightening one.

Another, arguably more useful, is to compare what you can get for a fixed price - in this case a couple of hundred pounds or so.

med6753:
I think we can all agree that any well equipped bench should have at least one example of a CRO and DSO. But if you're gonna run solo I hate to say it but it should be a modern feature packed DSO. Especially if you're heavy into digital. Me being the old fart that I am will always favor a CRO because I grew up with them, know how to use them, and don't mind fixing them when they go boom. And they WILL go boom and stink up the bench with magic smoke. I just consider that the joy of ownership and keeping the old iron alive.

Speaking of which....tomorrow I have no plans other than to finally get the vertical board out of the Tek 465 and figure out why channel 2 is FUBAR. If you're all good boys I may post some pron. And if you're super good maybe I'll take the Siglent apart for the first time as a bonus. You know what Dave sez...."don't turn it on, take it apart!"  :-DD       

tautech:

--- Quote from: tggzzz on June 01, 2018, 11:36:05 pm ---
--- Quote from: tautech on June 01, 2018, 09:53:00 pm ---Small difference; lowly DSO vs TOL professional CRO, fair comparison do you think ?  :palm:

--- End quote ---

That's only one comparison, and not a very enlightening one.

Another, arguably more useful, is to compare what you can get for a fixed price - in this case a couple of hundred pounds or so.

--- End quote ---
The last 4 CRO's I've acquired I got for nicks and my time like anyone else's need be factored into the real cost of getting a CRO and fixing it or keeping it going. I've bought many broken ones in years gone by and patched them up, given a good clean and added new probes and sold them on. Much like bd139 does and that's how I got into this initially. For some time I've wanted a 2465 or similar but even with the good, maybe better than basic skills I've gained the unobtainium IC and the battery supported EEPROM is shit no one needs excepting the most dedicated of Tek fans.
Even if we look at cheaper CRO options you have to go someway back to find stuff that is purely analog and straightforward enough for the novice to repair. Having linear PSU's would be a good guiding choice along with jellybean componentry and the manuals of quality like the Tek and HP of old. So there's always the cost of a re-cap to consider plus the cost of the time to do it hovering over a buyers head too.
It all adds up to not so cheap anymore.

Mr. Scram:

--- Quote from: mnementh on June 01, 2018, 02:45:51 pm ---The only problem there is that these scopes aren't exactly in the same price category anymore. I bought my 1054Z for $329 shipped from TEq on sale (actually, they price-matched a loss-leader sale Arrow was having, then hooked me up with a 50-ohm feed-thru terminator to sweeten the deal); street price is $350-379. The SDS1104X-E street price is $479-499 shipped, and the SDS1204X-E is $749-799.

It looks like you do get more for your money with the 1104X, but it's on average $150 more, and the 1204X is twice the price. Just to put things in perspective.

That said... buying a 'scope is like buying gaming computer gear or buying a big-screen TV; in order not to be obsolete by the time you get it home, you should dig deep in your wallet... so deep it makes your gonads ache... and buy as high on the food chain (while still shopping carefully with an eye towards bang:buck ratio) as you can with every penny you can scrape up, beg or borrow. 6 months down the road when you see the newest models coming out you won't regret the extra money spent, and you'll be wishing you had if you don't.


Cheers,


mnem
Money hurts.

--- End quote ---
You're hitting the nail on the head with the first bit. The Siglent proponents typically neglect to mention that while the new Siglent scopes are slightly more capable, they're also significantly more expensive. If that's the bit you need it's a good buy, but for a lot of people it's a marginal improvement for a lot of extra money. The DS1054Z and the Siglents aren't really competing each other, the price difference is too big.

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