[PRad] [New Logentry] DAQ improvement and some related issues

[cpeng at jlab.org]

Logentry Text:
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With the work-around implemented by Bryan, currently we ignore the busy signals from TI-slaves and manually add hold off time on TI-master to be safe.
Typically the busy from Fastbus is 12 us and busy from SRS is around 20, the hold off is 29.2 us.
This change improves the DAQ performance and we are taking 2.8 kHz data with 91% live time.

However, we observed a potential problem from ADC board in crate 4 slot 8.
It sometimes throw out 97 words instead of 65, and the last 32 words are all junk words.
We carefully checked the data, and found the first 65 words seem to be good, no loss on data.
Thus we just turned off the warning on this bad board and plan to check its connection or replace this board on Friday.


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This is a plain text email for clients that cannot display HTML.  The full logentry can be found online at https://logbooks.jlab.org/entry/3409327
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