Yokogawa DL7100/7200 - Any users? - Page 1
Forum section: electronics / testgear

author: nidlaX
author_rank: Frequent Contributor
timestamp: January 11, 2015, 12:30:34 am
content: I'm considering getting a used DL7100 oscilloscope and I'm wondering if anyone here owns or has used this series of scopes. My main concern is with possible issues a used scope may have, although I haven't found anything significant through Googling.Any input is appreciated, TIA!

author: Docholiday
author_rank: Regular Contributor
timestamp: January 14, 2015, 01:19:56 am
content: I myself have been looking at these scopes and researched them too. The only draw back is being able to install upgrades and not too mention able to find and get upgrades. Specifically the logic pods, and software upgrades. The manuals for these scopes can be found online and can be downloaded. Now about these scopes, they are well established in Japan with some in europe but very little. In the USA they are known very little. The quality is very high unlike what is found today and it is said onpar with many well known brands if not better. They were way ahead of their time in features, accuracy, and resolution. The company still is in business but these scopes reached their end of life in 2004 I think? If you cannot find the manuals pm me, and I will send them to you.Docholiday

author: Wuerstchenhund
author_rank: Super Contributor
timestamp: January 14, 2015, 06:34:20 am
content: Quote from: nidlaX on January 11, 2015, 12:30:34 amA while ago I looked at Yokogawa scopes, although primarily at the DL9140. The DL7x00 seem to be good scopes and surprisingly capable for 2000-vintage devices (and they have some very interesting features), but as Docholiday says they are pretty rare outside Japan, and finding parts and options/upgrades is difficult. And because they are rare outside Japan there are very few sellers of used Yokogawa scopes, and those that sell them are usually asking quite a lot for such a scope, and only a bit lower for scopes in poor shapeIf you can get one for a reasonable price in good condition and with all the options and parts you want then go for it. Just be aware that Yokogawa doesn't support them any more so if something breaks you can't just buy replacement parts, and finding 2nd hand parts is even more difficult than finding a complete scope.

author: nidlaX
author_rank: Frequent Contributor
timestamp: January 14, 2015, 07:16:08 am
content: Thanks. I've taken a look through the user manual. My main concern is that the 1GS/s (500MS/s for 4 channels) sampling rate for the 7100 seems pretty low for a 500 MHz scope from that era.Should I be worried about aliasing with those specs?

author: Wuerstchenhund
author_rank: Super Contributor
timestamp: January 14, 2015, 07:52:29 am
content: Quote from: nidlaX on January 14, 2015, 07:16:08 amIt really depends on what you want (after all, the sample rate is still better than what the Rigol DS1000z scopes offer). If you need the full bandwidth on all channels then 500MS/s won't really cut it, but if you're mostly say in the ~200MHz and below region then you should be fine.The strengths of these scopes are the logic analysis part and the (for that time) long memory, however Yokogawa never had particular fast sampling rates. If I remember right their primary markets were power electronics and industrial control systems for which these scopes were designed. They're not the greatest scopes (even for their age) for analyzing complex waveforms or extensive maths, nor does Yokogawa have particularly fast acquisition systems.Any reason you're looking particularly at Yokogawa?

author: nidlaX
author_rank: Frequent Contributor
timestamp: January 14, 2015, 07:58:30 am
content: Quote from: Wuerstchenhund on January 14, 2015, 07:52:29 amI've always wanted a scope on my bench for debugging purposes and a logic analyzer could be useful for an upcoming project. The Yokogawa with a logic module turned up as a local deal, that's the only reason I have for considering it.

author: Wuerstchenhund
author_rank: Super Contributor
timestamp: January 14, 2015, 08:59:22 am
content: Quote from: nidlaX on January 14, 2015, 07:58:30 amWell, if you can live with the sample rate (again, it's better than a DS100z) and the capabilities of the logic analyzer (check the manual) then I'd say go for it if the scope on offer is in good and fully working condition and the price is ok. You might not be able to make use of the full 500MHz bandwidth but in my opinion 1GSa/s on two channels (and 500MSa/s on four) is still good enough for a lot of tasks.And as a bonus you probably end up with a more mature product than a DS1000z.

author: nidlaX
author_rank: Frequent Contributor
timestamp: January 14, 2015, 03:47:14 pm
content: Quote from: Wuerstchenhund on January 14, 2015, 08:59:22 amThanks again!