more scope questions

So, the saga continues....
I was able to easily put together a 2-gang pot 1KB front and 5KB rear. I
didn't understand which part provides the resistance -- it's the ring on the
bit of tan board with the solder terminals. It was simply a matter of
taking the back half of the 5K pot and transplanting/adding it to the 1K pot
and voila! Installed and working properly. Actually, a rather simple job.
I now have a working vertical position control on Ch A and can see a signal.
This is not to say the scope is working.

Here's the front panel:
http://home.comcast.net/~psymonds/BK1472.htm

Afterwards, I did see some activity on the scope, but nothing I would call a
waveform. There is only trace display up to the vertical line one to the
right of center, so 40% of the display is blank. Rotating the horizontal
control makes it worse, not better, because it moves the display further to
the left. I would actually be very happy to get a signal across 60% of the
screen, if it were a good signal. Any comments on what I might do to get
100% of the screen in use?

I found a very nice 9 min crash course on using a scope on YouTube. I'm
reasonably clear about what the various controls do. My questions have to
do with actually getting the scope to show a trace. I have one Tek 10x
100mHz probe. I don't know if the probe is actually OK. It came with the
broken Tek scope that I sole. First question: is there a way to know if the
probe is OK?

There is a calibration port (NE corner) marked with a sq wave symbol 1V P-P.
I take this to mean it will provide 1V, but how would you set the v/cm and
the sweep/cm to get it to display? Is there some other some other easy
signal source that I can rig up?

Please don't think I'm silly here...can I put the probe to the hot side of
the AC line signal to get a 60Hz wave? With a 10x probe, this means the
scope sees 12V?

I've got an old laptop that I can charge up. Should I find some freeware
that will run on a computer? Do I just stick the probe in the sound output
port?

Thanks.


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