TM 1-1510-225-10 3A-6 (c)   Squelch Level Menu Page.  Pressing the  upper  soft  key  while  on  the  Squelch  Level  Menu page  will  increase  squelch  level.    Pressing  the  lower soft  key  while  on  the  Squelch  Level  Menu  page  will decrease squelch level. (d)   Relay Mode Menu Page. Not applicable with one transceiver. (e)   Dual  Microphone  Mode  Menu  Page.   Not applicable with one transceiver. (2)   Display.    This  fluorescent  display  shows system operation. (3)   Direct/Repeat or Number 1 Key.   Pressing the   D/R  key  alternates  transceiver  system operation   between   direct   and   repeat   transmit   and receive   operating   modes.      On   menu   pages,   key    1 moves backward through them.  Use the  1 key also to enter the number 1 when numeric entry is required. (4)   Menu  or  Number    2  Key.    Pressing  the MENU key brings the menu pages up on the display.   On  menu  pages,  pressing  the    2  key  moves  forward through them.  Use  the  2 key also to enter the number 2 when numeric entry is required. (5)   Display  or  Number   3  Key.    Pressing the DISP  key  brings  up  a  display  page.    Use  the   3  key also   to   enter   the   number   3   when   numeric   entry   is required. NOTE MUTE   function   does   not   work   with   only one transceiver installed. (6)   MUTE  or  Number   4  Key.    Pressing the MUTE key temporarily inhibits all monitored receivers, except the active transceiver.  Pressing the  MUTE key alternates audio between mute and normal.  Use the  4 key  also  to  enter  number  4   when  numeric  entry  is required. (7)   SCAN  or  Number   8  Key.    Pressing  the SCAN key will access the scan mode.  Use the  8 key also   to   enter   the   number   8   when   numeric   entry   is required. (8)   Data   Transfer   Port.      The   data   transfer port    allows    uploading    and    downloading    c hannel programming  from  a  personal  computer  using  remote programmer   software.      The   data   transfer   port   also allows    crossfilling    channel    programming    from    one C-5000 control-display unit to another. (9)   Cursor   Movement   Knob   (Outer   Knob).   Turning the cursor movement knob moves the cursor to the desired position. (10)   Cursor    Field    Value    Knob    and    Enter Button.    Turning  the  cursor  field  value  knob  changes the value in the cursor field.  Pressing the knob enters selection. (11)   Number   Keypad   Activation   Or   #   Sign Key.    Pressing   the  NUM  key  activates  the  numeric keypad for channel or frequency selection.  Use the # key also to enter a number sign when required. (12)   TEST  or  Number   7  Key.    Pressing  the TEST key will manually disable the squelch circuit on the   active   transceiver   and   will   display   the   transmit frequency    if    the    appropriate    page    is    displayed.   Releasing the key will return the transceiver to normal squelch    operation.        Pressing    this    key    (breaking squelch) facilitates setting receiver volume.  Use the 7 key  also  to  enter  the  number 7 when numeric entry is required. (13)   Special Function or   0 Key.  Pressing the Special    Function   (SF)    key    brings    up    the    special function display (not implemented).  Use the 0 key also to enter the number 0 when numeric entry is required. (14)   PLAY  or  Number  6  Key.    Pressing  the PLAY   key   will   initiate   audio   playback   of   recorded audio on selected transceiver.  Use the  6 key to enter the number 6 when numeric entry is required. (15)   Private  or  Number   9  Key.    Pressing  the PVT  key  selects  the  voice  encryption  function.    Use the  9  key  also  to  enter  the  number  9  when  numeric entry is required. (16)   Clear  Or  Asterisk  (*)  Key.    Pressing  the CLR  key  exits  an  operation.    Use  the    *  key  also  to enter an asterisk when required. (17)   Active Transceiver Volume Control Knob or   OnlOff   Switch.      The   active   transceiver   volume control  knob  (inner  knob)  adjusts  the  volume  of  the received    audio    from    the    active    transceiver    when turned.  Pressing the control knob turns the system on and off. (18)   Monitored   Transceiver   Volume   Control.   Turning the monitored transceiver volume control knob (outer   knob)   adjusts   the   volume   of   the   monitored transceiver system.