I wasn't aware of the 7k readout behavior so thanks for the tip. I'll have to try it and get back to you.
I wonder if this solution would apply to the 5440's with the 5a48 plugin?
jamie
toggle quoted message
Show quoted text
--- In TekScopes@..., "Rob" <rgwood@...> wrote:
"Now if only I could get the readout to reflect a 100x probe when doing tube
work!"
Is the 5000 series readout system different than the 7000?
On the 7000 series all you need to do is have 6.2K +- 5% of resistance
between the readout code ring around the BNC input and signal ground. I
have successfully made some BNC spring pin coded rings for my probes by
obtaining the outer ring part from a forum member here and then placing a
6.2K surface mount resistor on top of the spring for the pin. It works
great.
My struggle however has been to get a 1000x resistor value. Actually I can
get a 1000X with a 4.3K, 4.7K or so. However it will not add zeros so only
forces the readout to correct values for the mv range. So far I have not
figured out if either a "proper" resistance value is my problem or something
different s done for 1000x probes for the readout.
Anyway, try putting a 6.2K resistor from your scopes readout code ring to
ground and see if you get the 100X values showing. If you do than that
means the 5000 series readout is similar enough to the 7000 series that you
could build your own code collar like I did. Assuming that the 6.2K test
will be successful; a search in the old messages for "BNC collar" will lead
you to a discussion back around June 7th of this year that will help with
the rest.
If the 6.2K test fails..... well at least I tried to help * smile *.
Good luck
Rob
