Hello,
I recently acquired a Tektronix 2445B 'scope but the text display is faulty.
The display fails to give any meaningful information regarding timebase or volts/div settings. There are rows of dots along the bottom and various hyroglyphic characters appearing on screen.
I am able to remove the characters mentioned above using the readout intensity control.
The 4 traces work fine and are obviously fully controlable using the timebase and volts/div controls.
I can supply examples of the display if this would help. I recently found eprom sets for this model and wondered if replacing these may be a solution as I understand they hold calibration data etc.
Any advice would be gratefully received. Thanks for your help,
Larry