Used Oscilloscope Question....

[mikemaddux]

I cant find out the sensitivity range on this used oscilloscope that im looking at buying....

Tenma 72-320 - anyone own this, or have any experience with it?
Its:
Dual trace
Scope Bandwidth:20 MHz
I think the sensitivity range is 5 mV.........will this be a problem?

Anyone know if it has switchable 1X and 10X probes?


Ive searched google/yahoo for this model and cant find much info on its specs.....
It seems like a good deal and I want to see if it will work for building FX.

I know this is what to look for from the forum search function:
- dual trace; you need to watch one signal as a reference and see what's happening on another signal simultaneously. It's better if you can get both chopped and alternate traces, and most dual trace scopes do this. Chopped traces flip back and forth between the two traces very quickly so it looks like they're simultaneous; alternate does one sweep, then the other one. If you must choose one, choose chopped.
- good triggering; in scope lingo this is "triggered sweep". Do not buy a recurring sweep scope. This is unlikely, since every scope for the last 30 years has been triggered, but there are some real antiques on ebay.
- delayed triggering/trace is useful for some circumstances, but most hobbyists will never miss it.
- 20 MHz or better frequency response in a hard scope. Whatever you get in a sound-card o'scope.
- 10mV sensitivity range or better
- switchable 1X and 10X probes.