-- 

Nathan Rodning
Professor of Physics
(780) 492-3862  /  Fax:  (780) 492-0714
http://www.thehungersite.com/

An embedded message follows:

From: John Schaapman <jsch@relay.phys.ualberta.ca>
Date: Wed, 29 Aug 2001 09:29:14 -0600 (MDT)
To: nathan.rodning@ualberta.ca
Subject: PACT update (fwd)


---

Hi Nate,
  You might find the second paragraph of this forwarded message usefull.
It describes the power draw of a full complement of 12 PACT modules and
mentions that they should be spaced out in the crate for better cooling. (
Grant mentioned putting blank panels in the spaces to improve air flow.
This also indicates a reason why no other modules should be in this
crate. )
  These modules also use the + 24 v supply in addition to the +/- 6v
whereas the PAD modules do not. The slow control can readout these
voltages.
  Also, make sure there isn't a jumper on the front panel test pulse
trigger input because it's active low and will probably disable the
control module test pulse trigger.

John

P.S. If an MQT in a module fails it sucks down the power supply in that
module. 

John Schaapman                     Ph: 780-492-3043
Centre for Subatomic Research     Fax: 780-492-3408
University of Alberta            NOTE: new area code
Edmonton, AB
CANADA       T6G 2N5

---------- Forwarded message ----------
Date: Wed, 6 Jun 2001 12:49:06 -0600 (MDT)
From: John Schaapman 
To: Grant F. Sheffer 
Subject: PACT update

Hi Grant,
  I will be bringing you three modified PACT modules tomorrow so that you
can instrument one plane and play around with it. It will take about two
weeks to modify and test the remaining units. I have one unit which died
with a short on the + 5 v supply which may be due to another failed MQT.
Haven't tracked it down yet.
  The modules should be spaced out in the crate for cooling. I have tried
12 modules in either all even slots or all odd slots and the hotest module
reads about 50 that way in my crate ( yours may be better, hopefully ).
Current draw is 4 Amp on + 6 v, 24 Amp on - 6 v and 4 Amp on + 24 v.
  See you tomorrow. I will be around on Friday as well if you want to get
together then ( maybe to give me some preamp parts? ).

John
 

John Schaapman                     Ph: 780-492-3043
Centre for Subatomic Research     Fax: 780-492-3408
University of Alberta            NOTE: new area code
Edmonton, AB
CANADA       T6G 2N5

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