Electronics > Beginners
HELP!! Why is my new sig gen reading double on the occiliscope
cpposteve:
hi all. as the tittle suggest. why is my new UNI-T UTG1005A sig gen reading double?? the frequency is correct byt say when i set it to 1v pp it shows it as 2vpp on my scope. been through the manual and cant find it anywhere. any help would be apreciated.
thanks
steve
IconicPCB:
The instrument has a specified output voltage into specified load ( some are 50 ohm, others 75 and yet others 600ohm source/load impedance instruments).
If Your signal generator is specified as having 50 ohm source impedance then You need to terminate it with a 50 load in order o see the specified signal level.
The oscilloscope input impedance at lower frequencies is much higher than any of the above options hence the output voltage will be higher than specified.
cpposteve:
Brill. Thanks for the answer. So how do I go about putting a signal out to a circuit? Do I have to make sure it has the 50ohm resistor/load across it no matter what I’m doing? Thanks.
cpposteve:
yes you are a genius. i turned it all the way up to "HighZ" and it fixed my issue, thank you very much. :-+ :-+ :-+ :-+ :-+ :-+ :-+ :-+
netdudeuk:
https://youtu.be/tClE8s6RZdg
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