Log entry time 04:20:42 on March 01, 2009

Entry number 263974

This entry is a followup to: 263956

Followups:

• 263997 03/01/09 06:07 brads T2 timing shift reverted (fixed the timing glitch seen in runs 1911, 1912)

Kalyan and I used a pulser fed into the PMT cables for a bottom-row shower PMT and a bottom-row cerenkov PMT to fake a T2 and T6 trigger with good timing.

These timings were measured at the TS:

BEFORE any changes:
  T6 arrived before T1 by 20ns.
  T6 arrived after  T2 by 90ns.

The timing between T2 and T6 was, at best, marginal with respect to the
retiming circuit so we added 85ns to the T2 delay to compensate.

AFTER changes:
  T6 arrives before T1 by 20ns.
  T6 arrives before T2 by  5ns.