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Text File  |  1989-01-23  |  838b  |  38 lines
  1.  
  2.                          APPENDIX E
  3.  
  4.  
  5.  TNC-2 MODEM HEADER PARTS FOR 300 BAUD HF PACKET OPERATION
  6.  
  7.  
  8.          This refers to the demodulator header U19.
  9.  
  10.  
  11.                   PIN                  PIN
  12.  
  13.                   1 -----  N/C   ----- 16
  14.  
  15.  
  16.                   2 -------|(--------- 15
  17.                           0.022 uF
  18.  
  19.                   3 -----/\/\/\/\----- 14
  20.        15 K for Fc = 2200 Hz,  22 k for Fc = 1700 Hz
  21.  
  22.                   4 -----/\/\/\/\----- 13
  23.                            180 K
  24.  
  25.                   5 -------|(--------- 12
  26.                          0.0047 uF
  27.  
  28.                   6 -------|(--------- 11
  29.                           0.01 uF
  30.  
  31.                   7 -----/\/\/\/\----- 10
  32.                            100 K
  33.  
  34.                    8 -----/\/\/\/\----- 9
  35.                            750 K
  36.  
  37.  
  38.