Make New Entry,
Make Followup Entry
User name Bob / Neil
Log entry time 11:58:41 on July 1,2010
Entry number 329275
keyword=TDC for trigger signals
New: trigger flags: the trigger signals plugged into a TDC.
This will be important for finding coincidences. You'll need to
look for peaks in this TDC. Note, the start comes from whatever
made the trigger (there is no "re-timing" in this setup), and this
means you'll get a delta-function for that trigger.
ROC3, slot 11, channels 0 - 15 are the first 16 signals of the
normalization scaler. At the moment there are only 6 triggers,
see halog 329213 for trigger definitions. We did this by fanning
out the copy that went to the scalers using an ECL fanout module.
Trigger Latch TDC to determine the event type (do not use the
CODA event type; instead, use a bit pattern of these channels).
The usual trigger latch TDC had been unplugged.
We put it into ROC3 slot 11 starting at channel 48. The first 12
are the triggers after prescaling, the next 12 should be just
the triggers (which makes it identical to the trigger flags
Fig 1 = trigger flags for run 1391
Fig 2 = trigger latch for run 1394
In run 1392 ps4 was 1.6M, so tlatch for T4 was empty (as it should
be, so this was a good check)