Help on testing/picking an oscilloscope

From: The little lost angel (a?n?g?e?l_at_lovergirl.lrigrevol.moc.com)
Date: 09/25/04 

Date: Sat, 25 Sep 2004 20:32:55 GMT

My friend found for me what appears to be a cheap oscilloscope on sale
at a used parts place. He took down some details for the Tektronic
scope's three modules
5110 (the 2 chan thingy?)
5A14N (4 Chan amplifier??)
5D10 (Waveform Digitizer???)

The 5A14N has four inputs but he couldn't get four traces on the
screen no matter what. It seems broken since according to him, the
scope would display two traces from the other module.

The working bit with two channels seem to be ok. I think he missed out
the part number for this, but it's the most recognizable piece to me
from his description of what clearly are the two analog voltage
setting dials

But without any sort of input, Chan 2 appears to be faulty as there
are signals around half the screen in amptitude when he turned it to
the smallest voltage level 1mv, viewing at 100usec.

The last piece is the triggering piece 5D10 I think (my friend forgot
to note down the position of the modules)

So our problem is how do we tell if the scope is working sufficiently
to be worth the $100 the shop is asking for? We don't have any
sophisticated instrument to test with and the scope doesn't come with
any leads/probes. Are there some ways to conduct a quick on the spot
test with some very basic items?

Is it even worth considering or way too old to spend any money on? I'd
like to have 10Mhz to 20Mhz, this is only 2Mhz according to the web
but for the price, neither of us have found anything close to it yet.

thanks!!! 

-- 
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