MJL muTr flat-file logbook
==========================

12/9/00

Got sta-2/oct-1 chassis-2 master cable-1 to work by plugging in proper (type A)
cable upside down into chamber pigtail/ribbon connector.

Fixed sta-2/oct-5 chassi-1 master cable-3 by replacing this cable.

12/12/00

Long calibration cables:
- swapped white/black pair with green/black pair on long calibration cable
for stat-1/oct-3 at both ends. the green/black pair has a dead short.
- pulled and cut off pin on black wire of red/black pair on sta-1/oct-7 long
calibration cable round connector; then soldered on short piece of wire and
put on new pin.
- now all sta-1 long cables show about 54 ohms on each live pair from the
patch panel end of the cable

sta-2/oct-5 chassis-1 slave channels 48-63 are still dead:
- swapped cables several time
- moved one or the other end of cable to another block of channels
or another chamber connecter - problem always stays with chamber
connector
- measured resistance into chamber connector (a transition card) left
row of pins (towards sta-3) shows 1 Mohm except for bottem pin which
is grounded. All right row is grounded.
- also next connector down on same plane has mostly dead channels, but
third one down on same plane (which is on a different internal chamber
card) is ok.

12/12/00

sta-1/oct-4 gaps 2 & 3
- found patch cable between calibration driver modules and patch
panel had black & colored leads reversed for gaps 2 & 3. This would
apply negative pulses to the anode wires. DAQ with calibration verifies
that this improves things dramatically. However presently last half of
chassis-1 slave and all of chassis-4 are still dead. The latter is because
the analog cables on chassis-4 are not connected and the former because
one row of analog cables is not plugged in. Note also that the 3rd and
4th chassis in quadrant 3 seem to be swapped in the readout somehow.

12/13/00

sta-1
- read out station-1 after Andrew fixed a chassis in Q3 (new CROC)
and Nikki cabled up this and a neighboring chassis. It looks much
better now but still appears to have some inconsitent mapping problems.