On Tuesday 19 July 2016 08:20:37 Leonardo Marsaglia wrote: > Could it a disadvantage the use of a digital scope over an analog > one?. I remember talking about scoping half bridges for an induction > heater and somebody underscored the advantages of the analog scope > over the digital in some cases, wich is why some people recommend > having both of them. > Extremely in favor of both for real troubleshooting. The analog scope will never miss a narrow pulse, but depending on the writing speed of the tube, a narrow pulse that only occurrs less than 1% of the time will be displayed so dimly that YOU may miss it. The digital scope OTOH, if it catches that random pulse, will display it at full brightness.
I have 3 scopes, a Hitachi V-1065, dual trace, 100 mhz bandwidth, analog with some digital measurement thingies thrown in, and far more accurate in its old age than the teks I've used. And I bought one on those little pocket scopes, a DS-201 when the list was talking about them several years back now, and three years back I bought a 2 giga-sample dual trace digital, it arrived on my birthday so I got away with it. Its been a trick learning how to use it, but once I got the hang of it, it has become my goto scope for just about everything that doesn't need matching controls on both traces. A larger, color display, 1/4 the weight of the Hitachi, and can sit on the back of a test table without taking up the whole table with its length. I have some updated firmware for it, but strangely it needs a dosbox with a usb port to install it. I've been intending to pick up a small usb key formatted to dos to see if that would work, one formatted to vfat didn't. I think it demands pure 8.3 filenames. But that is not how the names came out of the zip file I found. Each has its strong points, and needs to be used according to what you want to see. So if the budget can cover both, have both in your bag of tricks. A digital such as I have, can be sourced from fleabay <http://www.ebay.com/itm/DSO5102P-Hantek-Digital-Oscilloscope-100MHz-2CH-7-WVGA-US-LOCAL-24Hour-Ship-Out-/252262967482?hash=item3abc0b68ba:g:ZysAAOSw4UtWShQK> for around $270 here in the states. $238+ship. I'd expect a similar unit might be sourced from the ebay.com on the euro region. This, after learning how to use it, would be my first purchase. I believe its plenty fast enough to catch what we need to catch when troubleshooting linuxcnc related stuff. The pocket, much more limited bandwidth stuff can also be quite handy, particularly when you have to unplug its usb charging cable, and hook the ground lead to something that is not ground in order to verify a certain signal. Due caution advised when the ground lead isn't connected to ground of course. Such a hookup could be lethal if insulating you precautions aren't taken. Above 24volts, and on up to around 3,000, I am standing on a plastic stool and have no grounded objects within my reach. Healthier that way, but around tv transmitters I have done exactly that. Cheers Marius, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports.http://sdm.link/zohodev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
