mobythevan Posted December 12, 2008 Share Posted December 12, 2008 Its an old one but the price was right (I traded for it). It is an HP 400mhz. Should work good for megasquirt troubleshooting. Quote Link to comment Share on other sites More sharing options...
jeffer949 Posted December 12, 2008 Share Posted December 12, 2008 I want to get a scope soon. Anybody on here used one of the USB scopes?? Quote Link to comment Share on other sites More sharing options...
pcs_russ Posted December 15, 2008 Share Posted December 15, 2008 http://www.tequipment.net/OWONEDU5022WBAT.html We use these at our office. They include a battery for testing stuff while driving. They are cheap enough that if we break one its not a big loss. they also include software for saving captures on your computer. Russ Quote Link to comment Share on other sites More sharing options...
eec564 Posted December 15, 2008 Share Posted December 15, 2008 What's the model number? That looks like a really nice scope. Menu driven, with triggering options out the wazoo. My dual-trace 20Mhz will do anything megasquirt or any car could ever need, but the ones with auto-ranging and single-event capture make life a lot easier. Quote Link to comment Share on other sites More sharing options...
mobythevan Posted December 15, 2008 Author Share Posted December 15, 2008 The model number is 54504A. Those portable scopes look nice for that price. My friend has a little portable Tektronix scope that we use when we are out and about. It is about one third the size of a laptop. It is a pain to borrow it and worry about breaking something. Quote Link to comment Share on other sites More sharing options...
eec564 Posted December 16, 2008 Share Posted December 16, 2008 That really IS a nice scope, 50Mhz one-shot-capture is quite good. I'd certainly quality it as a fully portable scope. Anything easily carried with one hand and small enough to rest on a car seat/roof/hood/etc is plenty portable. Even the nice new digital scopes are about the same size, just not as deep, since they don't need a CRT. If you were referring to the hand-held scopes when you talked about 'portable' then yea, I find those too easy to knock over, breaking them is a worry. I'd recommend getting a good set of 100Mhz or better probes, in a couple of different styles. The light weight kind with a little extending hook on the end that lets you grab the leg of a resistor or an IC on a circuit board is quite useful, if a little delicate. Also, be careful with ground loops, I know a couple people who have blown things up (including scopes) because of bad grounds in equipment. They now either use power cords with the ground lead cut off or 3 to 2 prong adapters. Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted December 16, 2008 Share Posted December 16, 2008 I want to get a scope soon. Anybody on here used one of the USB scopes?? Yep, we have a PicoScope USB scope (bought it from AutoNerdz) and it works very well for us. Quote Link to comment Share on other sites More sharing options...
naviathan Posted December 16, 2008 Share Posted December 16, 2008 What about this scope? Seems decent for the price, but I'm no expert in scopes. http://www.allspectrum.com/store/product_info.php?products_id=28 Quote Link to comment Share on other sites More sharing options...
z-ya Posted December 16, 2008 Share Posted December 16, 2008 What about this scope? Seems decent for the price, but I'm no expert in scopes. http://www.allspectrum.com/store/product_info.php?products_id=28 10MS/s is a pretty low sampling rate. The ecffective bandwidth of that scope is probably around 2.5MHz. Usable bandwidth is probably around 1MHz. Good for automotive stuff, and most Megasquirt work (except checking the CPU clock). Moby, that HP scope is more than adequate, and HP is high quality stuff. They can be non-intuitive to use (as compared to Tek), but once you figure it out, you will be good to go. I had to turn in all of my demo scopes after I left my job at Lecroy. Now I use (freebie): http://www.softdsp.com/product/sds200a_01.htm Pete Quote Link to comment Share on other sites More sharing options...
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