User name R. Michaels
Log entry time 22:32:30 on February 9,2002
Entry number 82428
keyword=T4 time offset
As far as I can tell from home, the time offset for T4 is
approx 500 nsec different from other triggers. The ratio
of T4 rate to T3 rate has been stable for 1+ week, also there
is only one time offset evident in the VDC data for T4, so
it is not a double pulsing problem. Most likely there is a
large shift coming from delay modules and cabling. I thought
we would have checked T4 relative to T3 at start-up (we
usually do), but perhaps T4 has a delay from old experiments.
This seems likely since the T4 delay module's dynamic range
is only 170 nsec -- probably a big cable, not a bad download.
If you want me to come in and fix this, give me a page.
This explains the shifted data in VDC time spectra.