Got a used oscilloscope.. model BK Precision 100Mhz 2190A
I'm using the built-in square wave generator to calibrate the leads... and strangely it doesn't seem to be working correctly.
Here is a pic:
**broken link removed**
Shouldn't the square wave be larger? Also, the notch for the square wave gen says .5p-p... so I set the volt/div to .5 and its just a straight line... i had to crank the volts/div over to 5mV to get it to detect even this little wave... is something messed up? I messed with the timer knob... to get this wave or a slightly longer one I would use .5ms or .2ms respectively.
Did I buy a lemon or is there something I am doing wrong?
I have tried using the trimmer on the probe but it wont straighten out that square wave... the picture above is shitty quality but the lines loop upward and are spaced apart, the pic makes it look like a sine wave.
The built-in calibrator likely makes a square wave at 1kHz, so the time base should be set to 0.5ms per div or so. Offhand, I'd say your vertical amp is messed up. In case you have a bad probe, just connect a clip lead from the calibrator direct to the vertical input using a short piece of wire to make contact with the center of the BNC.
Thanks KeepIt and Mike, tried keepit's settings and switched over to mikes settings... still only a flat wave... so Mike I would imagine there is indeed something screwed up in this thing... thanks guys!! Ima try to get BK to fix it for cheaper than a new one... but there of course is a point where it becomes more beneficial to have a new one lol.