Re: Seeking Advice: Tektronix 2465 vs. 2465B ¨C or other suggestions?
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The 2465 uses an EAROM, which does fail, and is not available in
any form new.? Its life is related to the number of times the
EAROM is written.? Mostly, it is only written when you calibrate
the scope, as the front panel settings are all analog pots and
switches that remember their settings by physical positioning,
unlike the 2465A and B.
If my EAROM failed, my plan would be to use a small modern MCU to replace it.
I would ignore the 42V(!) logic levels and tap the TTL signals the "other side" of the TTL<->42V converters. The signals are essentially serial, and I reckon I could bit-bash them with carefully written code in the MCU.
No, I won't bother unless and until it is necessary. Yes, I have a video of the test routing scrolling through the 256bytes, and would use that as the starting point.
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