TM 1-1510-224-10 d.  Normal Operation. (1) Turn-on procedure: 1. BATTERY switch (overhead control panel, fig.  2-15) - ON. 2. AVIONICS MASTER POWER switch (overhead control panel, fig.  2-15) - ON. (2) Receiver operating procedure: 1. Master VOL control - Adjust as required. 2. Receiver    RADIO    MON    controls    (audio control panel, fig.  3-1) - ON and adjust as required. (3) Transceiver operating procedure: 1. Transmitter-intercom  selector  switch  -Set to desired transceiver. 2. MIC  selector  switch  (instrument  panel,  fig. 2-18) -  HEADSET or OXYGEN MASK. 3. Control wheel microphone switch - Depress     to     XMIT (second level), or depress     cockpit     floor MIC     switch     to transmit. (4) Intercommunication procedure: 1. MIC  selector  switch  (instrument  panel,  fig. 2-18) -  HEADSET or OXYGEN MASK. 2. Intercom  mode  selector  switch  (fig.    3-1)  - NORM or  HOT MIC. 3. If    HOT   MIC    is    selected    -    Speak    into microphone. 4. If   NORM   is   selected   -   Depress   control wheel    microphone    switch    to    first    level (XMIT) and speak into microphone. e. Shutdown    Procedure.        AVIONICS    MASTER POWER switch - Off. 3-7.  UHF TRANSCEIVER (AN/ARC-164, HAVE QUICK II). a. Description.  The UHF transceiver, located on    the    left    equipment    rack,    is    a    line-of-sight    radio transceiver which provides transmission and reception of amplitude   modulated   (AM)   signals   in   the   ultra   high frequency    range    of    225.000    to    399.975    MHz    for   a distance range of up to 100  miles.    Channel  selection  is  spaced  at  0.025  MHz. A separate receiver is incorporated to provide monitoring capability   for   the   UHF   guard   frequency   (243.0   MHz). UHF  audio  output  is  applied  to  the  audio  panel  where  it is   routed   to   the   headsets.      This   system   provides   for secure  communications  through  interfacing  with  a  voice security system.  A frequency hopping, or anti-jam mode is   also   available.      The   UHF   transceiver   is   powered through   a   7.5-ampere   circuit   breaker   placarded   UHF, located on the overhead circuit breaker panel (fig.  2-9). The  UHF  radio  can  be  controlled  in  either  of  two  ways. Control is selected by means of the 164 STBY/NORMAL switch (pedestal extension, fig.  2-14).  When   NORMAL is     selected,     control     is     by     means     of     the     aircraft survivability equipment/avionics control system (ASE/ACS).      When   STBY   is   selected,   control   is   by means  of  the  UHF  transceiver  control  panel  (fig.    3-3) located on the pedestal extension. NOTE The    preset    channel    selector    and manual frequency selectors are inoperative  when  the  mode  selector switch is set to the GD position.  The receiver-transmitter  will  be  set  to  the emergency frequency only. b. Standby   UHF   Control   Panel   (fig.      3-3), Controls   and   Functions.      This   unit   provides   standby control, when the 164 STBY/NORMAL switch located on the  pedestal  extension  (fig.    2-14)  is  set  to  the  STBY position. (1) TOD/Hundreds/AJ switch. (a) Position T.  The T position is a momentary spring-return   position   enabling   input   of   time   of   day (TOD), or for an emergency clock start. (b) 2,3.    The  2  or  3  position  may  be  used  to select   the   100's   digit   of   the   desired   frequency   in   the normal   mode,   or   the   100's   digit   of   the   word   of   day (WOD)    element    for    the    anti-jam    (AJ)    mode,    and indicates units digit of frequency (0 through 9) in MHz. (c) A.  The A position is used to select the AJ mode of operation. (2) Preset channel selector  switch.    Selects  one  of 20 preset channels when mode selector switch is set to PRE. (3) Tens     digit     frequency     selector     knob     and indicator.  Selects tens digit of frequency (0 through 9). (4) CHAN    indicator.        Displays    selected    preset channel number. 3-5