Author Topic: Tektronix 2465B (No Options) U2360 ROM and Dallas Cal RAM image  (Read 161 times)

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Offline scott KTopic starter

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I finally finished calibrating my Tektronix 2465B oscope.
While I was at it, I thought perhaps someone might find my data useful?

My S/N is B052429
In an attempt to stave off bit rot in the UV EEPROM, I read, erased, programmed, and verified my ROM.
Unit powers on and still works so this is a viable binary load.
It is SW part number 160-5877-01, this is the older one it came with.  I know there is a newer one out there, but I figured why not capture it now.
I searched for this ROM SW part number in the forum and I did not find it so I posted it.

I used an old GTEK9000 to read the banked memory for U2360 because it was an Intel D27011A-250V5 part.
Most EEPROM programmers can't do this part.  Much to my surprise this OLD GTEK 9000 was easy to use ( bought used for $30 USD). I just used a terminal program to talk to it, once I made an adapter cable for the serial port.

I also attached calibration data from a recent calibration.  I did the cal myself.  I used a Time Mark generator, as well as a standard amplitude generator which I made, based on portions of Tektronix's model 506A.  It was 10V, 5V, 2V, etc... down to 20mV with a 1KHz 50% duty squarewave with no overshoot/ringing.  I verified the calibrator at work on the new scopes.
I was able to complete the calibration for the Horizontal, Vertical, Trigger, and Parametrics.  I also aligned the delayed sweep during the horizontal cal using calibrated test oscope.  So far this calibration is good enough for me.
Apart from the Autocal I did some pot tuning as needed per the service manual step by step , so these cals also assume one would do that as well.

These files are intended to help if someone needed an image to use.  To test if a unit is dead or viable.  Or worst case as a starting point if they need to calibrate.
At the least as an archive of this particular ROM image.

If there is indeed a ROM image of this exact type listed, please forgive me I did my best to find it but did not.
« Last Edit: December 20, 2025, 01:52:07 am by scott K »
 
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