>Now that you mention it....those lights you mentioned are
>on...all three of them!  If they are "on" then the red
>knob is not actually calibrating?

The red knob is not the calibration knob. It is a control that allows you to
adjust the picture to get waveform edges to convenient places on the screen
so that you can do waveform comparisons.

>Oh man...I'm going to go nuts with this thing!

You don't need to go nuts. You will find that the red knob has a switch,
probably at the most counter-clockwise position - just like turning off an
old radio using the volume control. This is normally the calibrated
position. Calibration is then normally done using a screwdriver adjusted
control through a hole in the panel, but on some equipment it may be
necessary to remove a panel to get at the calibration control.

Also note that the calibration signal is not necessarily accurate for
frequency, but is often reasonably accurate for voltage level. It is
normally used for adjusting the compensation on the probe to get a proper
square wave. To accurately calibrate time and frequency you will need an
external calibrator.

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics