After selling off a prior oscilloscope nearly two decades ago, I decided to pick up another used one. I have forgotten most of the functions. This is a used two channel 30 Mhz Elenco S-1325. I can return if it fails my testing. All I did so far use a coax t adapter between an RF signal generator and a 50 ohm dummy load to channel the remaining side into one of the scope channels. I then set it for 28 Mhz and 100,000 uV output. After some fiddling, mainly because I forgot most functions, I finally got a nice sine wave of the approximate frequency. What other functions might I perform to make sure it is functioning ok? Thanks.

================ ** You need to buy or borrow a test oscillator, function or sine /square. Then you check each setting of the controls, one at a time. Square waves should look "square". Vertical calibration can be checked with the help of any DMM on AC volts and a 400Hz sine wave. Horizontal calibration really needs a frequency counter, but the 50/60 Hz supply is very accurate . Make sure the "trace rotation" controlactually works. ..... Phil

tests to do on used oscilloscope?

May 01, 2021 21 Replies

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bruce bowser 5 years ago

Use your laptop as an oscilloscope (app)

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Michael Terrell 5 years ago

20Hz to 20 KHz is barely usable for audio. There are cheap digital scope kits on Ebay. That article requires an app that sells for $10. Why not add a bit more and get something that actually works?

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is DC to 200 KHz and is under $20.

My current scope is a Tektronix 2465A. It is four channel, and its -3dB point is 350 MHz. I got it for $189.42 on Ebay.

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