Got my Tec 475 off of eBay a few days ago. I have been playing with it, trying to refresh my scope skills that I have not used in 25 years.
My scope has a 2nd Volt Div setting. They are both on the same knob. One is at the 11 o'clock position. The other at 1 o'clock. The one at 11 is lit and I turn the knob to that position and it sets the scope to the selected voltage position.
But the knob only turns so far. There are additional settings that only come in line with the one at 1 o'clock. But I can't seem to get that position to lite. How do I get that position to light.
I have a cheap 10X probe. If I set it to 10X for calibration and dial down the voltage division settings so I can see a square wave, I am seeing "noise" all along the tops and bottoms of each transition. It is probably only a few micro volts but it is there. Is this normal?
I assume it probably has something to do with the quality of the probe?
If I ground the probe, I do not see the "noise".
My scope has a 2nd Volt Div setting. They are both on the same knob. One is at the 11 o'clock position. The other at 1 o'clock. The one at 11 is lit and I turn the knob to that position and it sets the scope to the selected voltage position.
But the knob only turns so far. There are additional settings that only come in line with the one at 1 o'clock. But I can't seem to get that position to lite. How do I get that position to light.
I have a cheap 10X probe. If I set it to 10X for calibration and dial down the voltage division settings so I can see a square wave, I am seeing "noise" all along the tops and bottoms of each transition. It is probably only a few micro volts but it is there. Is this normal?
I assume it probably has something to do with the quality of the probe?
If I ground the probe, I do not see the "noise".