Re: 11801C and the T1331 error: lost factory TB calibration data.

Reginald Beardsley

I plan to browse chipxs regularly. This is hardly an NOS SD-24. Last cal was 2011 due next in 2013. Measured rise times are ~14 ps with uncertainties of 4 ps. I am extremely pleased with it.

I did some calculations this morning. With an adjustable shorted stub on a 0.0001" reading micrometer head, the reflection would shift ~25 femtoseconds for each 0.0001" movement.

At 5 ps/div and 5120 samples we've got samples at ~10 femtosecond intervals. So measuring timebase nonlinearity is rather challenging.

I don't think any piece of gear I have has been as just plain amazing. The idea that it is 30 year old technology blows me away. I just wish I had better service data for it. I'm quite alarmed that after being idle for a few months I now have display jitter even after warming up for several hours.

I'd love to know who designed it and whether they are still alive.

Join to automatically receive all group messages.