From:	KEKUX::"pier@positron.ps.uci.edu" "Steve Pier" 29-AUG-1996 02:54:54.87
To:	unno@kekvax.kek.jp
CC:	pier@positron.ps.uci.edu
Subj:	Re: Minimum hardware setting
 
Nobu:
 
> (1) one DSP card
> (2) one LL card
> (3) one bias card
> (4) one 40 MHz clock card
 
This is all you need.
 
> We do not have a TCB card (Trigger conditioning board).  Is the TCB 
> required?  What is the cable connections? etc...
 
The TCB is not required unless you are using a source/scintillator.  The
TCB's replacement (TCC) has been built, but there is only one TCC
so far (at LBL, pixels) and strips software does not yet support the TCC.
 
 
From a message to Ryuichi:
 
  I think you will just be doing calibration initially.  For this, you need
  only supply an external clock to the SLL card.
 
  See the schematic 'LDSP.sch'.  The clock is TTL level +0 (low) +3V (high),
  40 MHz.
 
  RP5, the terminator resistor pack on the SLL should be installed.
 
  Bring the clock to the SLL on a twisted-pair cable -- not a coax.  The clock
  connects at pin 29 (marked L_12 on the schematic).  Ground is at pin 30.  To
  avoid bending the connector pins or connecting the cable wrong, you may want
  to build a 34-conductor cable with an IDC (ribbon) connector that mates
  with JP11, even though only one signal is used.
 
 
I believe the UCSC clock module outputs TTL levels (at least when it is
terminated to ground).  Be sure that the clock levels do not exceed 0V-5V
BEFORE connecting to the SLL.  You may need to install a 50 ohm terminator
at the clock output to get the level down.  The terminator on the SLL (RP5)
is 120 ohms to 3V.
 
 
Steve