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| HP 54835A scope Calibration failure. |
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| magnetchief:
Hi guys, having an issue with an HP 54835A scope. The HDD had failed and the back light was very dim. Replaced the drive with a preformatted image of a later version. Replaced both backlights. Scope seems to be working well, all 4 channels are fine. I can input an AC signal and it displays as I would expect. It passes all the self tests. But will not pass the calibration tests. I am using a 30cm cable for the tests. Measured the DC output voltage from the aux port. It reads apx 800mv. Never changes even during the cal test. Even when changing the level -2.5 to +2.5 just stays at + .8v Any advice appreciated. |
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