Post by thread:[OT]: CRO

Hi all, Has anyone used the handheld storage CRO from Fluke, or the semi(?) portable one from Tectronix? If so, any good or bad points. Any better ones around for a similar price? -- Best regards Tony mICro's http://www.picnpoke.com spam_OUTsalesTakeThisOuTpicnpoke.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

>Has anyone used the handheld storage CRO from Fluke, or the semi(?) >portable one from Tectronix? I have Fluke multimeters and Tektronix scopes. I've tried it the other way around, and wouldn't recommended it. The THS720 is a Tek handheld scope I have owned for about 4 or 5 years. It is very portable. I've taped it to my thigh while riding a recumbent electric-assist trike. It has two scope inputs and one meter input. You can use them simultaneously. They are all electrically isolated from one another, also isolated from the AC adapter input and the RS232 port. NO COMMON GROUNDS, it's fantastic. You can attach one probe's ground to the hot side of the AC line, the other probe's ground to the neutral, while taking a resistance measurement of your tongue and logging to your PC(software available on my website). Battery life and charging is the biggest complaint I have. They've fixed that in the current "A" series. Mine you charge 20 hours and get 2 hours of run time. I built a quick charger(schematic and code available on request, uses a 16C71). It has not broken, screen is good, works just like the day I got it. It is "water resistant" too. Cheers, Bob Blick -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

I used a handheld scope from Fluke before (3 years ago?), it had nice features like using the DMM function and still being able to see the waveform. The only bad point that I remember is that it seemed the A/B scope channels must have been multiplexed into the DAC because it showed a slight timing delay between the channels which in fact did not exhist. It's apparent when you have both channels hooked to the same clock line, but how often does that happen? It can really mess with your head when troubleshooting. I don't remember the model number, but it was a $3k+ model and since it's the only one I ever used, I guess it could have been a "Fluke" (pun intended) :P At 11:11 AM 3/1/01 +1100, you wrote: {Quote hidden}>Hi all, > >Has anyone used the handheld storage CRO from Fluke, or the semi(?) >portable one from Tectronix? > >If so, any good or bad points. > >Any better ones around for a similar price? > >-- >Best regards > >Tony > >mICro's >http://www.picnpoke.com >.....salesKILLspam@spam@picnpoke.com > >-- >http://www.piclist.com hint: The PICList is archived three different >ways. See http://www.piclist.com/#archives for details. ------------------------------------------- Danny Goddard Design Engineer ARMA Design Tel:(858) 549-2531 Fax:(858) 549-2594 Email: dan_goddardKILLspamarmanet.com Web: http://www.armanet.com The information contained in this electronic message is private and may contain privileged, confidential or inside information. Any distribution, copying or forwarding or use of this communication by anyone other than the intended recipient(s) is strictly prohibited and may be unlawful. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email .....listservKILLspam.....mitvma.mit.edu with SET PICList DIGEST in the body

>Has anyone used the handheld storage CRO from Fluke, or the semi(?) >portable one from Tectronix? One of my colleagues has a TEK TDS220 which I have had a little play with. It is a real nice device, highly portable, but I do not think it is battery operated. It is a true dual channel 100MHz unit. There is also a 4 channel unit (TDS224). I am in the throws of getting a TDS3034 which is a little larger, but still very portable. the 3000 series come as 100, 300 or 500MHz and 2 or 4 channel. I do not know just how portable (as in battery operated) you require, but the TDS220 series is real nice. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email EraseMElistservspam_OUTTakeThisOuTmitvma.mit.edu with SET PICList DIGEST in the body

I have a TDS220 and it is a very nice digital scope for a lower price than most digital scopes. It is line-powered, not battery powered. -Robert Severson http://www.usbmicro.com http://usbsimm.home.att.net http://www.jged.com http://www.annatechnology.com > One of my colleagues has a TEK TDS220 which I have had a > little play with. It is > a real nice device, highly portable, but I do not think it is > battery operated. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listservspam_OUTmitvma.mit.edu with SET PICList DIGEST in the body

> One of my colleagues has a TEK TDS220 which I have had a little play with. It is > a real nice device, highly portable, but I do not think it is battery operated. Yes ... I have one, and they are very nice, but not battery powered. -- Mitch -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email @spam@listservKILLspammitvma.mit.edu with SET PICList DIGEST in the body

I currently use a Fluke 199 Scopemeter. I think they've been out for two years now. I wouldn't recommend it for precision work, but it's perfect for my job. I develop software for telephone test equipment. And I do most of my work at my cubicle desk. The Scopemeter sits between my ICE2000 and my line simulation equipment. I often have to look at differential signals across tip and ring of a telephone line and verify that I have 3.3V logic on a PIC the responding to those signals. The scope has two ground isolated channels, and a ground isolated power supply. Which is just what the doctor ordered. Periodically, I have to go out into the field, and the Scopemeter has been a lifesaver on a few occasions. It's allowed me to determine if the strange behavior that we were seeing was because of a bad phone line, or due to a bad test set. Just for the record, it's always been a bad phone line. -Mike {Original Message removed}

At 11:11 AM 3/1/01 +1100, Tony Nixon wrote: >Hi all, > >Has anyone used the handheld storage CRO from Fluke, or the semi(?) >portable one from Tectronix? I have used both and currently own the Tek THS720P. I did not like any of the Fluke scopes that I tried - the 95, 99, 123. On the 9x series scopes, the trigger was almost useless and they aliased horribly on slow signals (under sampled). A few months ago, a buddy asked me what I thought of the 199 which he had been demoing for the previous couple of weeks. He brought it over and I was able to show him that most of the problems that I saw on the early models were still there. I then loaned him my Tek. Bottom line - he bought 3 - THS730A for his company. Don't get me wrong - I don't think that the THS7xx is perfect. In fact, I don't use it much for analog stuff at all - I use my Tek 465. The handheld 720 is just too slow and noisy - I never can tell if the noise I am seeing on the signal is really there or not. But it is now the first instrument I reach for if I am troubleshooting digital stuff or power electronics (both analog and digital). I now consider the isolated grounds essential if I am working with industrial voltages. If you are looking to purchase one of these beasties, get the suppliers to send out demo units for a couple of weeks. You should be able to decide which one works best for your purposes. dwayne Dwayne Reid <KILLspamdwaynerKILLspamplanet.eon.net> Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax Celebrating 17 years of Engineering Innovation (1984 - 2001) * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Do NOT send unsolicited commercial email to this email address. This message neither grants consent to receive unsolicited commercial email nor is intended to solicit commercial email. -- http://www.piclist.com hint: To leave the PICList RemoveMEpiclist-unsubscribe-requestTakeThisOuTmitvma.mit.edu