i Source DAC Codes
                        ----------------------

                                                           Rev  16-MAY-1993


          Output             DAC Code                  Counter Code
           Level           Hex      Decimal          Hex      Decimal
        ----------       --------------------      --------------------
         + FS             $7FFF      32,767         $FFFF      65,535
         + FS - 1         $7FFE      32,766         $FFFE      65,534

         + 0.90 FS        $7332      29,490         $F332      62,258
         + 0.75 FS        $5FFF      24,575         $DFFF      57,343
         + 0.50 FS        $4000      16,384         $C000      49,152
         + 0.20 FS        $1999       6,553         $9999      39,321
         + 0.10 FS        $0CCD       3,277         $8CCD      36,045

         + E-2 FS         $0148         328         $8148      33,096
         + E-3 FS         $0021          33         $8021      32,801
         + E-4 FS         $0003           3         $8003      32,771

         BPZ + 1          $0001           1         $8001      32,769
         BPZ              $0000           0         $8000      32,768
         BPZ -1           $FFFF      65,535         $7FFF      32,767

         - E-4 FS         $FFFD      65,533         $7FFD      32,765
         - E-3 FS         $FFDF      65,303         $7FDF      32,735
         - E-2 FS         $FEB8      65,208         $7EB8      32,440

         - 0.1 FS         $F333      62,259         $7333      29,491
         - 0.2 FS         $E667      58,983         $6667      26,215
         - 0.5 FS         $C000      49,152         $4000      16,384
         - 0.75 FS        $A001      40,961         $2001       8,193
         - 0.90 FS        $8CCE      36,046         $0CCE       3,278

         - FS + 1         $8002      32,770         $0002           2
         - FS             $8001      32,769         $0001           1

        NOT Used Code     $8000      32,768         $0000           0





                 Programmed DAC Code Counter Stop Codes
               ------------------------------------------

                                                           Rev  16-MAY-1993

The Stop Code PROM's have 11 address lines labeled:  A0:A10.   These address
lines are connected to the following Stop Code control switches:

     PROM
      Pin      Address Line      Stop Code Control Switch
    ------    --------------    --------------------------
       8           A0              10**-4  of Full Scale
       7           A1              10**-3  of Full Scale
       6           A2              10**-2  of Full Scale
       5           A3                0.10  of Full Scale

       4           A4                0.20  of Full Scale
       3           A5                0.50  of Full Scale
       2           A6                0.75  of Full Scale
       1           A7                0.90  of Full Scale

      23           A8                      Full Scale
      22           A9                      ZERO Output
      21           A10              Hi --> Positive,  Low --> Negative



   Output       PROM Address of        More Significant      Less Significant
    Level      the Stop Code Hex      Byte PROM Data Hex    Byte PROM Data Hex
 ----------   ---------------------   ------------------    ------------------
  + FS             $0500                     $FF                   $FF

  + 0.90 FS        $0480                     $F3                   $32
  + 0.75 FS        $0440                     $DF                   $FF
  + 0.50 FS        $0420                     $C0                   $00
  + 0.20 FS        $0410                     $99                   $99
  + 0.10 FS        $0408                     $8C                   $CD

  + E-2 FS         $0404                     $81                   $48
  + E-3 FS         $0402                     $80                   $21
  + E-4 FS         $0401                     $80                   $03

  BPZ              $0600                     $80                   $00
  BPZ              $0200                     $80                   $00

  - E-4 FS         $0001                     $7F                   $FD
  - E-3 FS         $0002                     $7F                   $DF
  - E-2 FS         $0004                     $7E                   $B8

  - 0.10 FS        $0008                     $73                   $33
  - 0.20 FS        $0010                     $66                   $67
  - 0.50 FS        $0020                     $40                   $00
  - 0.75 FS        $0040                     $20                   $01
  - 0.90 FS        $0080                     $0C                   $CE

  - FS             $0100                     $00                   $01


NOTES:

  1. All other address locations in the Stop Codes PROM's are filled with
     $80 for the MSByte PROM and $00 for the LSByte PROM  (i.e. a randomly
     selected address in the Stop Code PROM's will drive the output to zero).