Re: 11801C and the T1331 error: lost factory TB calibration data.
Albert Otten
[This topic continued from https://groups.io/g/TekScopes/message/158778 ]
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I know the discussion was about the later CSA803(A/B/C) and 11801(B/C). I have an 803 and an 803A. The U500/U511 batteries in my 803 were dead, so factory calibration constants would have been lost and I could freely experiment with the CCALCORRECTION command. To my surprise this command was unknown to the 803. This is also confirmed by the commands lists in U810/U910 EPROM images. The CSA803 Service Reference is now available at Tekwiki (thanks HÃ¥kan!). There is no reference at all in that manual to factory set calibration constants. The corresponding texts in the C version was obviously added later on. So I am convinced that in the CSA803 nothing is lost when an A5 time base board Dallas chip dies. [[BTW in the pdf manuals provided by Tek you won't find words in the added text with an ordinary search. Likely Tek used a custom character coding in the added text. If you copy-paste for instance T1331 from the added text into the search field then you will find the other instances of T1331 in the added text.] Albert
On Thu, Aug 15, 2019 at 04:21 PM, freemail8877 wrote:
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