L1 Fired Strobe  FanOut Box
            -----------------------------


                                            Current Revision:  10-AUG-2001




      What is in the Trig FW FanOut Box  M123 Back Middle
     -----------------------------------------------------

   As of 31-JULY-01 the FanOut Box had 2 sections.   They are:

       7th input pin pair  -->   1st through  8th output pin pairs
       8th input pin pair  -->  11th through 20th output pin pairs

       The chips that are in are:  U23, U20, U19, U24, U25

       Both inputs are using U25.  U25's 3 unused sections look clean
       and these would be the 4th, 5th, and 6th input pairs.

       The 1st through 8th output pairs use chips:  U23 for the 1st 
       through 5th output)  and  U20 for the 6th through 8th output.
       I'm not certain what pull down terminator resistors are used.
       U20 also drives the 9th and 10th output pairs  but one would
       need to be careful connecting up to the inputs of these sections
       of U20 to make sure that there were not additional pull down
       terminators connected to these inputs.

       The 11th through 20th output pairs use chips:  U19 for the 11th
       through 15th outputs and   U24 for the 16th through 20th outputs.
       I'm not certain what pull down terminator resistors are used.



Added two new sections to the "Buffer Fanout Box" so that we may have a
buffered version of the Global L1 Acpt Strobe outside of the Trig FW  (e.g.
as is being used to send the signal to the SMT "noise monitoring".  Added
the two new 1 in to 5 out buffers as described below.   The current detailed
description of this fanout box is:

   We added two more sections, each with a 5x fanout,  on 9-AUG-01

       5th input pin pair  -->  21th through 25th output pin pairs

          This uses all 5 sections of U21 as the output driver
          Its inputs can be terminated by using just pins 1,5,6 on R63

       6th input pin pair  -->  26th through 30th output pin pairs

          This uses all 5 sections of U22 as the output driver
          Its inputs can be terminated by using just pins 1,5,6 on R61