Electronics > Beginners
Oscilloscope settings
airofu:
Very new to using an Oscilloscope but I have a DSO138, I think I've got it working how I want but not sure if the DSO138 is my limitation or the probes...I'm trying to set my amp gains and checking for a clipped signal at 40hz. At low gain around it is around 40v and it shows the signal as normal (1v-x5 setting), I keep raising the gain but it seems to go beyond the screen (past 60v max? tried changing the scale but it seems to go too high to show the signal). Do I need a higher spec Oscilloscope maybe DSO150? or can I change the probes to x10 and this should show me the higher voltage/signal? Hope that makes sense or I could be totally off-track....
ataradov:
Quote from the official spec: "Maximum Input voltage: 50Vpk"
And yes, 10x probe will help you here.
airofu:
Thanks for confirming, will get some x10 probes and see how I go.
tggzzz:
If you are using the scope to measure mains, stop right now before you damage the scope or yourself.
Understanding and correctly using probes is vital to being able to use a scope. You would benefit from reading the references (particularly the safety references) in https://entertaininghacks.wordpress.com/library-2/scope-probe-reference-material/
magic:
For 40Hz you might as well use a divider made of two resistors. Even for 40kHz if they are reasonably low value like 100k/10k, but that's about the limit.
Which isn't to say that a 10x probe isn't a useful thing anyway, and not just because of increased input range. Much lower input capacitance too.
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