I guess this is the graph, found by Google search
.
It's valuable to know what's really happening.
Looking at the SA graph and comparing to the table, it seems to show
a big falloff by 100 Hz, while the table only shows about 2% drop.
Is this due to some artifact of the SA or am I misreading it
(likely). The scale indicates start 0Hz, stop 1000 Hz which is 100
Hz per division.
Don Black.
On 05-Jan-13 6:31 AM, Neil Gruending wrote:
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???
I also use a 80K-40. I also sometimes use it as an
oscilloscope probe for low frequency measurements.
Somewhere I found a good frequency response graph for it.
Neil
On Fri, Jan 4, 2013 at 11:16 AM,
Craig Sawyers
<c.sawyers@...>
wrote:
???
> I just have a Fluke 40K-6 6 kilovolt
probe which is good for anything
except
> the CRT acceleration voltage. It is
very accurate on all of my meters
*except*
> for my best one, an HP 3478A, because
that one has a
> >10 gigohm input resistance on the
two most sensitive ranges and high
> voltage attenuating probes are usually
designed to work into 10 megohms.
>
> The 75 megohm input resistance of the
40K-6 is annoying though
I went for a Fluke 80K-40, which is 1000:1
and an input resistance of
1G-ohm. Goes to 40kV, so amply good enough
for final acceleration voltages.
Craig
