[sdiy] scope question

[Harry Bissell Jr]

No sh!t.  Bob's MY uncle too...  :^P

You can use any probe that will match the scope's
input capacitance well enough. There is a range of
compensation on a probe that allowa a square wave to
be displayed as 'square' without over or undershoot.

Usually there is a test point on the from of the scope
for making this adjustment.

The higher the frequency of the probe, the smaller the
capacitance usually is.  I have used 60Mhz probes on a
MHz scope without any problems.

I'd suggest you buy 10X probes... ~or~ a switchable
1x / 10x probe.

10x probes have ten times the input impedance, or 1/10
of the loading on the circuit.  Although they will
make all the voltages smaller, usually they are the
correct
probe to use.  I NEVER use a 1x probe, ever.   If you
have a signal THAT small, it us usually of a high
enough impedance that the 1x probe won't work anyway !

H^) harry


--- John Neilson <jneil at echonyc.com> wrote:

> 
> 
> Hi, all, a lurker checking in with a really basic
> question:
> 
> I was given an old Hickok 515 scope this weekend. 
> It appears to work,
> but I don't have a manual, any probes, or -- to be
> frank -- much of a 
> clue how to use this to display synth waveforms.
> 
> Its range is to 15Mhz, so does that mean I just need
> to get a pair of 
> probes that are also 15Mhz and bob's yer uncle? 
> Something like this,
> perhaps?
> 
> http://www.testpath.com/Product.aspx?pn=110-564
> 
> Anyone have a good source of manuals for something
> like this?  Google
> didn't turn up much.
> 
> Thanks!
> JN
> 
> ----------------------- Tear Along Dotted Line
> -----------------------
> John Neilson                                        
>   jneil at jneil.com
> 
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