TEK 2232 analog scope questions

[cobbler]

Hello players, I have a very simple circuit where a line goes high to 5V for three seconds and then low to 0V for three seconds.

I am trying to learn to use my TEK 2232 scope which has the Measurements feature while in STORE mode (digital storage). Having a problem getting the voltage measurement to read accurate on the scope.

I attached the two methods the Operators Manual describes to read voltage.... in "normal mode" (the distance between Cursor1 and Cursor2), and "Referenced to Ground".

I followed both procedures in the manual and no matter what settings I use, the cursors never display any voltage greater than 0.6V !

In the attached screenshot you will see the Fluke DMM is displaying correctly 5.0V but the Tek is displaying only 0.6V

Can any old players help a young player out of this trap?

[gmarentette]

It says to put one cursor on a low point and the other on a high point. Are you doing that?

[cobbler]

Quote from: gmarentette on Today at 03:50:58 AM

It says to put one cursor on a low point and the other on a high point. Are you doing that?

Yes you can see here in this pic I am using the "between cursors" delta method, it still reads incorrectly 0.500V

[w2aew]

You are using a 10x probe that does NOT have the sensing pin that tells the scope that it is a 10x probe.  So, the scope doesn't know that the voltage scale needs to be multiplied by 10x, hence your voltage is off by a factor of 10.

http://www.jmargolin.com/projects/TekReadout_files/image003.jpg

You can also tell that this is the case because you've got a 5V step, but the scope is showing 1 division of deflection and it shows that it is on a 0.5V/div scale.

[cobbler]

Ok thanks w2aew, now changed it to 1X on my generic probe and it is reading correctly.  BTW thanks for your great videos, today I finally figured out how to view "two waveforms" using the A/B delayed sweep from watching your video on that... the buttons/dials were completely different than your scope but finally figured it out!  That has been puzzling me for weeks.

Off to ebay to find some used tek probes!