SIERRA UNH Interface Connectors           5/9/00
          
All interface to telemetry and power is through 37 pin D connectors.
37P connectors will be mounted on the UNH electronics boxes.
Wallops will supply mating 37S connectors on cables.

Signals are wired as twisted pairs. The pinout lists give the signal pin
and show its pair pin in parenthesis. For PCM signals the + and -
differential lines are twisted together. The - pin is NOT ground.

Independent pairs should be carried through to the final destination.
All power returns should be wired independently to power ground. Analog
signal returns may be tied together at a ground buss near their
destination.

The single wire "chassis" pin is intended as a redundant means of
insuring a good electrical connection between the experiment chassis and
the TM section chassis. This pin may be tied to chassis in the TM
section wherever it is convenient.

  The main payload has 2 UNH interface conectors.
  
BEEPS box (HI & BEEPS)  37 pin D connector
    SIG RET     
     1  (20)    +28V    power
     2  (21)    +28V    power
     3  (22)    HVTO    High Voltage Turn On
     4  (23)    TEST    Pulse amp test
     
     +   -
     5  (24)    MAJF    PCM major frame sync
     6  (25)    GCKI    Gated shift clock for HEEPS I
     7  (26)    HII     HEEPS I image serial data
     8  (27)    HIT     HEEPS I total counts
     9  (28)    GCKP    Gated shift clock for BEEPS P
    10  (29)    GCKO    Gated shift clock for BEEPS O
    11  (30)    BPI     BEEPS P image serial data
    12  (31)    BOI     BEEPS O image serial data
    13  (32)    BPT     BEEPS P total counts
    14  (33)    BOT     BEEPS O total counts
    
    SIG  RET
    15  (34)    BS      BEEPS sweep monitor
    16  (35)    HIB     HEEPS I bias monitor
    17  (36)    BC      BEEPS box current
    18
    19      
         37 chassis


    
HEEPS E box (HE & TED)  37 pin D connector
    SIG RET     
     1  (20)    +28V    power
     2  (21)    +28V    power
     3  (22)    HVTO    High Voltage Turn On
     4  (23)    TEST    Pulse amp test

     +   -
     5  (24)    MAJF    PCM major frame sync
     6  (25)    GCKE    Gated shift clock for HEEPS E
     7  (26)    HEI     HEEPS E image serial data
     8  (27)    HET     HEEPS E total counts
     9  (28)    TED1    TED1 total counts
    10  (29)    TED2    TED2 total counts
    
    SIG RET 
    11  (30)    TS      TED sweep monitor
    12  (31)    TP      TED skin potential
    13  (32)    TB      TED bias monitor
    14  (33)
    15  (34)    HES     HEEPS E sweep monitor
    16  (35)    HEB     HEEPS E bias monitor
    17  (36)    HC      HEEPS E box current
    18      
    19
         37 chassis


  Each subpayload has one UNH interface connector.
  
HEEPS I box             37 pin D connector
    SIG RET     
     1  (20)    +28V    power
     2  (21)    +28V    power
     3  (22)    HVTO    High Voltage Turn On
     4  (23)    TEST    Pulse amp test

     +   -
     5  (24)    MAJF    PCM major frame sync
     6  (25)    GCKI    Gated shift clock for HEEPS I
     7  (26)    HII     HEEPS I image serial data
     8  (27)    HIT     HEEPS I total counts
     9  (28)
    10  (29)
    
    SIG RET 
    11  (30)
    12  (31)
    13  (32)
    14  (33)
    15  (34)
    16  (35)    HIB     HEEPS I bias monitor
    17  (36)    HC      HEEPS box current
    18      
    19
         37 chassis