Products > Test Equipment
Just got a Tek 2465A, couple questions (how I screwed the calibration data)!!
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MarkL:

--- Quote from: alpher on March 27, 2018, 08:04:18 pm ---I've checked the resistance, dead short to GND.

--- End quote ---
Oh well, I thought I had a good guess.  Those top two screw pads are floating on my 2465 board, but it's obviously a different design.
z01z:
If it helps, these are the constants from a 2465A, written down from the screen (so there may be some errors).
alpher:

--- Quote from: z01z on March 28, 2018, 06:25:05 am ---If it helps, these are the constants from a 2465A, written down from the screen (so there may be some errors).

--- End quote ---

Wow, thanks man !! :) :)
Much appreciated, will try them over the weekeend, now I have to figure out how to calculate "spiral" checksum.
MarkL:

--- Quote from: alpher on March 28, 2018, 12:42:05 pm ---Much appreciated, will try them over the weekeend, now I have to figure out how to calculate "spiral" checksum.

--- End quote ---
Here's a starter for you.  I already figured out the "spiral-add" for the 2465.  With any luck it's not too different from the 2465A:

  https://www.eevblog.com/forum/testgear/tektronix-2445-2465-cal-settings-earom-er1400/msg927144/#msg927144

It's just the assembly code that does the spiral-add translated into C.  No points for efficiency.
alpher:
Thank you Mark, now I remember I read your thread awhile ago, if I remember right you were having a similiar issue
only with a plain 2465, how did it end up for you?
Must reread your thread.
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