#
#                     CMX-0  Nets File
#
#        Jumper Controlled "Ground" Connections
#
#                 to the CMX Ground Planes
#      -------------------------------------------
#
#
#                                   Original Rev. 28-June-2013
#                                    Current Rev. 24-Sept-2013
#
#
#
#
#  This file holds the Net Statments for the
#  Jumper Controlled Ground Connections to the
#  CMX Ground Planes.
#



#
#       SFP Cages   Slow Optical Transceivers
#      ---------------------------------------
#
#  Each SFP Cage can individually be tied to the CMX
#  pcb ground planes through 2  0603 Zero Ohm Jumpers,
#  or left floating, or grounded with a series
#  resistor to break the ground loops.
#
#

#  Cage for SFP #1

NET  'SFP1_GND_A'   SFP1-26   JMP91A-1   # Jumper A to Cage pin 26
NET  'SFP1_GND_B'   SFP1-21   JMP91B-2   # Jumper A to Cage pin 26

NET  'GROUND'      JMP91A-2   JMP91B-1   # Connection to Ground Plane


#  Cage for SFP #2

NET  'SFP2_GND_A'   SFP2-26   JMP92A-1   # Jumper A to Cage pin 26
NET  'SFP2_GND_B'   SFP2-21   JMP92B-2   # Jumper A to Cage pin 26

NET  'GROUND'      JMP92A-2   JMP92B-1   # Connection to Ground Plane


#  Cage for SFP #3

NET  'SFP3_GND_A'   SFP3-26   JMP93A-1   # Jumper A to Cage pin 26
NET  'SFP3_GND_B'   SFP3-21   JMP93B-2   # Jumper A to Cage pin 26

NET  'GROUND'      JMP93A-2   JMP93B-1   # Connection to Ground Plane


#  Cage for SFP #4

NET  'SFP4_GND_A'   SFP4-26   JMP94A-1   # Jumper A to Cage pin 26
NET  'SFP4_GND_B'   SFP4-21   JMP94B-2   # Jumper A to Cage pin 26

NET  'GROUND'      JMP94A-2   JMP94B-1   # Connection to Ground Plane






#  For now I need to keep pins  #34, #35, and #36  of each
#  SFP Cage connected to the GROUND net.  This is bacause
#  currently cage pins 34, 35, and 36 are used as a
#  ground point for 2 pins in the SFP connector and as
#  the Ground Return for the Differential Via Pairs
#  that take 1 Gbps data into or out from the SFP
#  optical component.
#
#  For now the current plan is to cut pins 34, 35, and 36
#  off of the SFP Cage.  These 3 pins are at the back of
#  the cage and they do not include the tab that controls
#  the height of the SFP Cage above the top of the pcb.
#
#  The plan is to solder together the split at the back
#  of the stamped metal cage, cut off the 3 pins, file
#  the pin stubs down flat, exacto knife off any burs
#  of metal, air hose off the parts, and finally repack
#  them for shipment.


NET  'GROUND'  SFP1-34  SFP1-35  SFP1-36   # Ground SFP1 pins 34,35,36

NET  'GROUND'  SFP2-34  SFP2-35  SFP2-36   # Ground SFP1 pins 34,35,36

NET  'GROUND'  SFP3-34  SFP3-35  SFP3-36   # Ground SFP1 pins 34,35,36

NET  'GROUND'  SFP4-34  SFP4-35  SFP4-36   # Ground SFP1 pins 34,35,36






#
#       CTP Connectors  J10/J11  Pins 34/68
#      -------------------------------------
#
#  Pins 34 and 68 of the CTP Connectors J10 and J11
#  may be tied to the CMX Ground Plane through
#  Jumper  JMP97  and  JMP98.


NET  'GND_J10_34_68'      JMP97-1   # Jumper for J10 Pin 34/68 Ground
NET  'GND_J11_34_68'      JMP98-2   # Jumper for J11 Pin 34/68 Ground

NET  'GROUND'   JMP97-2   JMP98-1   # Connection to Ground Plane






#
#     Grounds to the  J10/J11  CTP Connector Bodies
#    -----------------------------------------------
#
#
#  Jumpers  JMP95A  and  JMP95B  ground the bodies of
#  the J10 and J11 CTP Connectors.
#
#  The bodies of J10 and J11 are tied to the Front Panel
#  and thus to the Stiffener Bars and to the Backplane
#  Guide Pin Receptacle.
#

NET  'GND_J10_BODY'   J10-69   JMP95A-2   # Net to the body of J10
NET  'GND_J11_BODY'   J11-69   JMP95B-2   # Net to the body of J11

NET  'GROUND'       JMP95A-1   JMP95B-1   # Connection to Ground Plane






#
#     Grounds to the  18  <CG>  Backplane Pins
#    ------------------------------------------
#
#
#  Jumpers  JMP96A  and  JMP96B  ground  18  <CG>  pins
#  in the backplane connectors J4, J5, and J6.
#

NET  'REAR_CG_GND'   JMP96A-1   JMP96B-1   # Net to the <CG> pins in Backplane
                                           # Connectors  J4,  J5,  and J6.

NET  'GROUND'        JMP96A-2   JMP96B-2   # Connection to Ground Plane






#
#     Grounds to the  BF & TP  Heat-Sinks
#    -------------------------------------
#
#
#  Jumper resistors:  R801 and R802  ground the  BF  Heat-Sink.
#
#  Jumper resistors:  R803 and R804  ground the  TP  Heat-Sink.
#

NET  'BF_HS_GND_1'   HS1-1   R801-2     # Jumper-resistors to the
NET  'BF_HS_GND_2'   HS1-4   R802-2     # Base Function FPGA Heat-Sink

NET  'GROUND'        R801-1   R802-1    # Ground end of jumper-resistors


NET  'TP_HS_GND_1'   HS2-3   R803-2     # Jumper-resistors to the
NET  'TP_HS_GND_2'   HS2-4   R804-2     # Topological Processor FPGA Heat-Sink

NET  'GROUND'        R803-1   R804-1    # Ground end of jumper-resistors