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FREQUENCY HOPPING OPERATION.  Continued
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TM-11-5821-333-12 Non-ICOM Airborne Radio AN/ARC-201(V) ICOM Airborne Radio AN/ARC-201A(V) Manual
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LOADING OPERATING DATA.  Continued - TM-11-5821-333-12_24


TM   11-5821-333-12 1-18. VOICE OPERATION WITH KY-58 COMSEC EQUIPMENT. Continued b.  Plain-Text  Voice.  The  operator  talks  into  the  headset.  The  audio  signal  goes  from  the  intercom  to  the to  the  RT  (through  the  Z-AHQ,  if  used)  for  transmission.  A  received  signal  is  routed  to  the  intercom  through the  Z-AHQ,  if  used,  and  otherwise  through  the  KY-58  with  no  processing.  The  operator  hears  the  audio  in  the headset. c.  Cipher-Text  Voice.  The operator talks into the headset. The voice signal goes from the intercom to the KY-58 (through the Z-AHQ, if used). In the KY-58, the signal is encrypted. The encrypted signal then goes to the RT (through the Z-AHQ, if used) for transmitting. A received signal is routed from the RT to the KY-58 (through the  Z-AHQ,  if  used).  The  signal  is  decrypted  and  routed  out  to  the  intercom  (through  the  Z-AHQ,  if  used).  The operator  then  hears  the  signal  in  the  headset. 1-19. LOADING OPERATING DATA. a.   Introduction.  There   are   three   ways   to   load   data: Keyboard Local   fill   (FH   data) Receive   and   store   electronic   remote   fill   (ERF) b.   Keyboard.   The   keyboard   is   used   to   load   SC   frequencies   and   FH   sync   time.   The   MAN   frequency   and   the CUE  frequency  are  loaded  in  this  way.  A  frequency  of  30  MHz  is  automatically  loaded  into  the  MAN  preset  by  the RT   when   power   is   turned   on.   This   will   remain   the   MAN   preset   until   another   frequency   is   loaded   using   the   key- board. c.  Local   Fill  (FH  Data).   Local   fill   makes   use   of   an   ECCM   fill   device.   The   drawing   shows   what   typically   hap- pens   inside   the   RT.   It   is   an   example   of   hopset   and   lockout   set   loading.   (The   displays   in   the   drawing   are   exam- ples.   The   numbers   may   differ   from   those   seen   during   actual   loading.) 1-14 KY-58 (through the Z-AHQ, if used). The signal goes in and out of the KY-58 with no processing and from there


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