Iwatsu scopes - Page 1
Forum section: electronics / testgear

author: G7PSK
author_rank: Super Contributor
timestamp: May 06, 2013, 08:56:22 pm
content: I am looking for a better scope and came across Iwatsu, not a brand I have heard of, are they any good and what are their weak points. All I know is they come from Fukushima in Japan.

author: Wuerstchenhund
author_rank: Super Contributor
timestamp: May 06, 2013, 09:12:40 pm
content: Quote from: G7PSK on May 06, 2013, 08:56:22 pmIwatsu is a very old Japanese manufacturer of test equipment, telecommunication systems and optical reproduction systems. Their core market is Japan and other Asian countries, and more a rarity everywhere else.Their scopes are generally very high quality, very solid and reliable, but in terms of features and performance Iwatsu nowadays is way behind of other manufacturers. Their portfolio is quite limited (no real midrange and no high end). If you don't need latest features and only want a reliable scope then they are fine.However, Iwatsu was/is also the manufacturer for certain LeCroy scopes (WaveJet, Waverunner LT, WavePro 900), which have been developed together by both companies. These scopes exhibit the typical Iwatsu quality but are much more advanced than original Iwatsu scopes (and even many scopes from other brands).Before that LeCroy has also sold rebadged Iwatsu analog scopes. Amongst them was a model which had a LCD monitor and used a scan converter tube to convert the analog input signal into display information.But at the end of the day it depends on what you want to do with the scope. Do you have a specific scope in mind?

author: jpb
author_rank: Super Contributor
timestamp: May 06, 2013, 09:37:38 pm
content: I have a WaveJet made by Iwatsu but it dates from 2006. Looking on their web-site their latest scope seems to be an upgrade of this with the main improvements being 1M instead of 500k memory, LAN etc built-in with the option of trigger out (and faster LAN) and some more sophisticated triggers. But basically it is a small evolutionary change. But this perhaps is no bad thing as it means there are unlikely to be major bugs in the firmware etc.The WaveJet is solid and I'm generally pleased with it. It starts up very quickly and seems well built. I like the history mode and it can do spectrum displays in persistence mode. When I tested the calibration (as best I could) it seemed spot on even though it had not been calibrated since 2006 (I got it in January this year). The time base accuracy is specced at 10ppm which is better than a lot of lower end scopes and I found it to be much better than this.The waveforms per second are limited to 3,600 but this particular feature I think is rather over emphasized because of Agilent pushing it hard.One drawback is a noisy fan. One other annoying thing is the FFTs are limited to 8k points but you can only set points to 1k or 10k so this means in practice you're often limited to just 1k points (something I found out experimenting today).They also do analogue scopes I think.

author: Hydrawerk
author_rank: Super Contributor
timestamp: May 06, 2013, 09:54:45 pm
content: http://www.iti.iwatsu.co.jp/index_e.htmlQuoteWhat? The Fukushima power plant disaster happened at 11th March 2011...Well, Iwatsu produces onlyoneseries of digital oscilloscopes. Oh, why only one??http://www.iti.iwatsu.co.jp/en/products/ss/index.htmlThis DS-5500 is strange... Is can be 500Mhz bandwidth but only 1Gs/s per each channel. Even worse than Rigol... A new Iwatsu is definitely not a banf per buck, these scopes are not suitable for hobbyists... Unless you buy it very cheap...Well, Iwatsu has some advanced analysis function, but not much modern hardware. Iwatsu has no subsidiary in Europe. It's not possible to download an user manual from their website.What the hell. I could not find any eshop that sells those DS-5500 scopes...This Iwatsu looks bad when compared to Agilent or Tektronix.We know that LeCroy WaveJet is manufactured by Iwatsu. You cannot buy other Iwatsu products in Europe...Let's compare prices of these four channel scopes.----------------------------------------------------------------------------------------LECROY - WAVEJET WJ324-A - DSO, 200MHZ and 1Gs/s per each channel - costs3970 Euro.http://de.farnell.com/lecroy/wavejet-wj324-a/dso-200mhz-4-ch-500kpts-ch/dp/1698111--------------------------------------------------------------------------------------------AGILENT TECHNOLOGIES - MSOX3024A 200MHz and 2GS/s per each channel+ included 16 channel Logic analyzer!!! costs4365 Eurohttp://de.farnell.com/agilent-technologies/msox3024a-wavegen-dsoxdvm-education-kit/scope-education-200mhz-options/dp/1923880------------------------------------------------------------------------------------------AGILENT TECHNOLOGIES - DSOX3024A 200MHz and 2GS/s per each channelcosts3400 Eurohttp://de.farnell.com/agilent-technologies/dsox3024a-wavegen-dsoxdvm-education-kit/scope-education-4-ch-200mhz-option/dp/1923888--------------------------------------------------------------------------------------------There is no reason to choose the Iwatsu (=LeCroy) scope...

author: nctnico
author_rank: Super Contributor
timestamp: May 06, 2013, 10:22:15 pm
content: I used to have several Iwatsu scopes. They are not bad. Which model are we talking about?

author: Hydrawerk
author_rank: Super Contributor
timestamp: May 06, 2013, 10:41:22 pm
content: We are talking about models manufactured today.

author: jpb
author_rank: Super Contributor
timestamp: May 06, 2013, 10:44:55 pm
content: I think that they are very geared to the Japanese market. They have not responded to my e-mails from the UK (I just sent a couple of questions). They also sell in Asia.I think their tie up with LeCroy means that they don't really have a presence in Europe, so I'm not sure how easy it would be to actually buy one of their scopes directly or to get service and support. Of course their LeCroy ones are supported by LeCroy themselves.

author: jpb
author_rank: Super Contributor
timestamp: May 06, 2013, 10:47:47 pm
content: Quote from: Hydrawerk on May 06, 2013, 09:54:45 pmI paid £1200+VAT for my WaveJet 334 (2006 vintage) but it was new (old stock). I've since been told by a LeCroy sales person that they are offering up to 55% off so if you talk to LeCroy you might find that you can get a much better deal than the official list which are rather high.

author: Hydrawerk
author_rank: Super Contributor
timestamp: May 06, 2013, 10:49:45 pm
content: Any idea how to buy a DS-5500 Iwatsu scope in USA or Europe??Well, to say it honestly, Iwatsu isnota big scope manufacturer who sells many different types of scopes. They cannot be compared to Rigol, Agilent, Tektronix or even GW Instek.Iwatsu is good at other products.http://www.iti.iwatsu.co.jp/en/pdf/IWATSU_DigestE_1204.pdf

author: jpb
author_rank: Super Contributor
timestamp: May 06, 2013, 10:54:06 pm
content: Quote from: Hydrawerk on May 06, 2013, 10:49:45 pmI don't think you can. I e-mailed them and ask a while back (last year) and they never responded.LeCroy may produce an upgraded WaveJet based on the 5500 I suppose, but I suspect it would be over-priced.

author: G7PSK
author_rank: Super Contributor
timestamp: May 07, 2013, 07:41:11 am
content: I was actually looking at an Iwatsu ss-7804A on ebay I bid on it but lost out when I had to go and do something else so I guess it's a bit moot now any way but thanks for the reply, I am just looking for a faster scope than the one I have at present which is fine for looking for noise on 50HZ and served me fine for most of what I want but falls flat on its face when confronted with the Jim Williams pulse generator. So I thought I would look for another scope.

author: nctnico
author_rank: Super Contributor
timestamp: May 07, 2013, 10:52:55 am
content: I'd get a Tektronix TDS500 series. I traded my Iwatsu ss-7804A for such a scope.