3 May
2010
3 May
'10
6:44 a.m.
Hi
I wouldn't call it improving the probe, it is more like
unimproving.
You'd need to add a capacitr across the resistor that
is inside of the probe tip. Not too easy to do with
most probes. Many older probes for old HP scope
would work. Also the Nicolet probes that I see on
ebay will also compensate to 30 pf.
The value of the capacitor is quite small. On the order
of 3 pf. 30/9
Dwight
From: chrism3667 at yahoo.com
fine, but what do you have to do to improvise a probe.
the 2216 may have a 30pF capacitance IIRC.
> It means the input of the scope has 1 M resistance in
> parallel with 22 or 47 pF of capacitance. This means that a
> 10-1 probe for example would need to be adjustable to
> accomodate this input impedance. Probes are usually marked
> with what input capacitance range they can drive (The 1M
> resistance is standard for all high impedance probes)
>
> Peter Wallace
>
_________________________________________________________________
Hotmail is redefining busy with tools for the New Busy. Get more from your inbox.
http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:…