Quantcast Figure 3-6.  TSEC/KY-58 Voice Security System

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TM 55-1510-220-10 Figure 3-6.  TSEC/KY-58 Voice Security System d. Operating Instructions. (1) Loading procedures. NOTE These procedures must be accomplished prior to takeoff. (a) Set  the  TSEC/KY-58   power switch to ON. (b) Set  the  TSEC/KY-58  address  selector switch to the register to be filled. (c) Set the  TSEC/KY-58  MODE switch to LD. (d) Identify   the   loaded   variable   on   the TSEC/KY-58 writing surface. (e) To   load   additional   variables,   set   the TSEC/KY-58  address  selector  switch to the next storage register to be filled and repeat steps 1, 2, and 3. (f) Set the  TSEC/KY-58  MODE switch to  C;  leave  the  TSEC/KY58  address selector     switch     in     any     numbered register. (2) Preparing  the  TSEC/KY-58  for  secure  voice operations. NOTE These procedures must be accomplished    prior    to    takeoff    and normally following the loading procedures outlined above. (a) TSEC/KY-58  power  switch  is  set  to ON. (b) TSEC/KY-58  MODE  switch  is  set  to C. (c) TSEC/KY-58  address  selector  switch is set to any numbered storage register position. (d) Turn     the     TSEC/KY-58     VOLUME switch fully clockwise. (3) Receiver operating procedure: (a) Transmitter-interphone selector switch  (audio  control  panel,  fig  3-1) No.  4 position. (b) HF  function  selector  switch  (fig.  3-7) Set to USB, LSB or AM. Change 2 3-14

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