#
#                      CB_Fan  PCB  Nets
#
#        Drive the  J8  Scaler  Connector Control Signals
#        ---------------======----------------------------
#
#
#                                                Original Rev. 23-Feb-2012
#                                             Most Recent Rev. 13-Apr-2012
#
#
#  This file is for the 8 Control Bus version of the CB-Fan card.
#
#
#  J8 is the connector for  Scaler  Control Bus.
#
#  This is an  ECL  Control Bus that uses Load_Next_Event
#  signal from J6 instead of the TRIG signal.
#
#  This section of the CB-Fan net list drives the 4 Control
#  Signals:  CRST, LNE, CLR, and CLK  on to the  J8  Scaler
#  Control Bus connector.


#  Drive  CRST  on the Scaler Control Bus  the J8 Connector
#  The CRST signal can be sent to the Scaler Control Bus by installing R132
#  The CRST signal can be held LOW on the Scaler Control Bus by installing R133

NET  'CRST_9_DIST_DIR'               U41-8             # CRST Distribute 9 Direct
NET  'CRST_9_DIST_CMP'               U41-7             # CRST Distribute 9 Complement

NET  'CRST_9_CMOS'          R132-2   U41-2             # Output from CRST 9 LVDS Rec.

NET  'CRST_9_ECL'           U43-19   R132-1   R133-2   # Input to CRST 9 ECL Driver

NET  'CRST_9_ECL_OUT_DIR'   U43-24    J8-1    R81-2    # CRST DIR Out Scaler
NET  'CRST_9_ECL_OUT_CMP'   U43-25    J8-2    R82-1    # CRST CMP Out Scaler

NET  'GROUND'                                 R133-1   # Pull-Down for CRST




#  Drive  LNE  Load_Next_Event  on the Scaler Control Bus  the J8 Connector
#
#  Recall that the LNE signal is also used for
#         the SBCs_READ_NOW control signal.

NET  'LNE_RN_DIST_DIR'         J6-7     U41-6          # LNE from J6 conn Direct
NET  'LNE_RN_DIST_CMP'         J6-8     U41-5          # LNE from J6 conn Complement

NET  'LNE_READ_NOW_CMOS_ECL'   U43-20   U41-3          # LNE Dist CMOS to ECL

NET  'LNE_ECL_OUT_DIR'      U43-27    J8-3    R83-2    # LNE DIR Out Scaler
NET  'LNE_ECL_OUT_CMP'      U43-26    J8-4    R84-1    # LNE CMP Out Scaler




#  Drive  CLR  on the Scaler Control Bus  the J8 Connector
#  The CLR signal can be sent to the Scaler Control Bus by installing R134
#  The CLR signal can be held LOW on the Scaler Control Bus by installing R135

NET  'CLR_9_DIST_DIR'               U42-8             # CLR Distribute 9 Direct
NET  'CLR_9_DIST_CMP'               U42-7             # CLR Distribute 9 Complement

NET  'CLR_9_CMOS'          R134-2   U42-2             # Output from CLR 9 LVDS Rec.

NET  'CLR_9_ECL'           U43-13   R134-1   R135-2   # Input to CLR 9 ECL Driver

NET  'CLR_9_ECL_OUT_DIR'   U43-4     J8-5    R85-2    # CLR DIR Out Scaler
NET  'CLR_9_ECL_OUT_CMP'   U43-5     J8-6    R86-1    # CLR CMP Out Scaler

NET  'GROUND'                                R135-1   # Pull-Down for CRST




#  Drive  CLK  on the Scaler Control Bus  the J8 Connector

NET  'CLK_9_DIST_DIR'               U42-6             # CLK Distribute 9 Direct
NET  'CLK_9_DIST_CMP'               U42-5             # CLK Distribute 9 Complement

NET  'CLK_9_CMOS_ECL'      U43-12   U42-3             # CLK Dist 9 CMOS to ECL

NET  'CLK_9_ECL_OUT_DIR'   U43-7     J8-7    R87-2    # CLK DIR Out Scaler
NET  'CLK_9_ECL_OUT_CMP'   U43-6     J8-8    R88-1    # CLK CMP Out Scaler




#  Ground the 2 unused inputs to the ECL Driver chip U43

NET  'GROUND'  U43-11   U43-18




#  Connect the ECL Pull Down Resistors to the Vtt Supply

NET  'VTT_1'   R81-1    R82-2
NET  'VTT_1'   R83-1    R84-2
NET  'VTT_1'   R85-1    R86-2
NET  'VTT_1'   R87-1    R88-2