Log entry time 23:37:30 on February 19, 2011

Entry number 347739

This entry is a followup to: 347735

I revived some old code for checking the helicity data from TIR.
It's "redundant" to the somewhat problematic ring buffer data.  

Analyzing from home ...

For the recent run 1603.

3.26 % of data have helicity gate off (in transition).  This might be
ok for 960 Hz, I'm not sure.

50% of data in each helicity state.  25% have qrt = 1, so quad structure
is seen.  From data dumps, I see practically all the helicity 
transitions for this run since the DAQ rate exceeds 960 Hz. The quad
structure is seen there too.  I did not check the predictor algorithm.
That would be a useful check.  Students should try it.

The 103.7 kHz clock looks like it's ok.   

So it seems the "redundant" TIR helicity data are good.  Overall I'd
say we're in good shape.  It would be helpful to keep the DAQ rate 
above ~960 Hz, if possible, for making robust use of these TIR data.