This README1.txt file contains instructions for 1024x1024 InSb array
configuration 1 board.
FILES:
cfgsch.pdf = pdf schematic
config1.net = netlist in CASE format
fandev3.pdf = example only layout file for both the fanout and 
            configuration pcb.                                                

DESCRIPTION:

The fandev3.pdf layout shows partial layouts for both boards.
The fanout board is on the left and the config board on the 
right.  The traces should be routed in a fanout pattern without
using vias on the fanout board.  The goal is to route everything
on one layer and with short noninterfering traces.


PCB Layout instructions:
1.This board mates with the 2mm headers of the FANOUT1 board.
2. PCB dimensions =  3.75" x 3.75 " square board.
2a. Round PCB corners .125 inch radius.
3. Place square cutout (keepout area) 1.5" x 1.5" at center.
3a. Round corners .125 inch radius.
4. Place 60 pin, 2mm sockets to align with FANOUT1 board locations- Layer 1.
5. Make PCB 4 or more layers.
5a. Stackup:
component outer side layer 1 (noisy clock signals, filtered biases, 2mm sockets).
layer 2 =  ground plane = AGND
layer 3 = signal layer (quiet signals = XX_OUTXX, filtered biases).
layer 4 = ground plane = AGND and DIN 41612 connectors.
5b. Signal routing: try not to use vias except to connect to filter components.
layer 1 => route signals from P1 and P3 
layer 3 => route signals from P2 and P4
6. P5 and P6 will be DIN 41612 type R Male connector (96 pin male straight conn)
 normally, Type C for right angle connection.
6a. IMPORTANT: Type R has reversed CBA column order  (C is closest to board edge),
 Type C is VME standard ABC (from board edge) order.
6b. Layout board with Type C pin assignments and connector pin order. 
Schematic shows Type C pinout/orientation. Since the type R connector
will be mounted on the bottom (LAYER 4) the column (C -A) swap should be OK.
6c. ADD silkscreen info " TYPE C=A1,R=C1" for first pin designation.
6d. ADD mounting holes for type R connectors.
7. DIN 41612 connectors mount on layer 4 NOT layer 1.
8. Solder mask/ silk screen ONLY the COMPONENT SIDE.
9. Add clearance holes for 4 socket corner holes = .282 inch diameter.
9a. Holes are .984" from centerline and 1.968" from each other.