TM 1-1510-218-10 3A-39 NOTE The    60-second    warmup    period    can    be monitored  upon  power  up  of  the  system.   When  the  knob  is  switched  directly  from OFF to ON mode, the display will blank.  As the  radar  sweeps  the  blue/white  will  grow outward.    Just  before  the  warm-up period is complete, the screen will turn black for a few    seconds,    then    the    radar    will    begin transmitting   and   the   screen   will   display radar    returns.        No    radar    transmissions occur until the warmup period is complete. (c)  Test   (TST).      The   multicolored   arc display   test   pattern   is   displayed   in   this   mode   of operation.  The test pattern is initialized and sized to fit the   80 nm   range   and   can   also   be   scaled   with   the range  select  buttons.    No  radar  transmissions  occur while  TST is selected.   TEST will appear in the lower left of the display.  STAB OFF is always displayed in top left. (d)  SBY.      Fully   energizes   the   system circuitry  but  no  radar  transmissions  occur  in  the  SBY mode   of   operation.      The   antenna   is   parked   at   0° azimuth   and   30°   tilt   down   with   the   antenna   drive motors locked. (e)  OFF.    Removes  primary  power  from the   radar   indicator,   but   the   radar   still   has   power applied.    The  radar  will  remain  active  with  no  radar transmissions occurring, for up to a maximum time of 30  seconds.    This  time  delay  allows  time  to  park  the antenna at 0° azimuth and 30° tilt down. (3)   Range    ( RNG)     Buttons.          Clears     the display and advances the indicator to the next range.   The  upper  button  increases  range;  the  lower  button decreases it.  The RDR 2000 display range is: 10, 20, 40, 80, 160, 240 nm.  The selected range is displayed in the upper right corner of the display with the range ring distance displayed along the right edge. (4)   Track (TRK) Buttons.  Provides a yellow track  centerline  for  vertical  profile.    With  the  radar  on and   a   track   button   pushed,   the   track-line   position moves left or right in 1° increments at a rate of about 15°   per   second.      When   Vertical   Profile   mode   is selected, the antenna scans the slice at the track line azimuth  position.    While  in  Vertical  Profile  mode,  the TRK   buttons   move   the   slice   left   and   right.      The azimuth  position  of  the  antenna  is  displayed  on  the upper left corner of the indicator. (5)   TILT  Knob.    Permits  manual  adjustment of   antenna   tilt   15°   up   or   down   for   best   indicator presentation.    The  tilt  angle  is  displayed  in  the  right corner of the display. (6)   GAIN  Knob.    The  gain  knob  adjusts  the radar  gain  from  0  to   –20  dB  (CCW  rotation  reduces gain).    The  gain  knob  will  only  function  when  in  the MAP mode. (7)   Navigation (NAV) Button. Places indicator  in  navigation  mode  so  that  preprogrammed waypoints may be displayed.  If other modes are also selected,  the  NAV  display  will  be  superimposed  on them.    The  radar  will  display  weather  when   NAV  is selected if the radar selector is in the ON position. (8)   Ground  Mapping  (MAP)  Button.    Places the   radar   system   in   ground   mapping   mode.      Gain control  capability  is  configurable  at  installation  to  be enabled  or  disabled  in  ground  map  mode.    Ground map   colors   are   green   for   weak   returns,   yellow   for moderate  returns,  and  magenta  for  intense  returns.   “MAP” will appear on the lower left of the display. (9)   Vertical  Profile  (VP) Button.   Selects and deselects    the    Vertical    Profile    mode    of    operation.   When  VP  is  selected  on  the  indicator  the  radar  will provide  a  vertical  scan  of  ±  30°  at  the  location  of  the horizontal   track   line.      Selecting   the   VP   mode   of operation    will    not    change    the    selected    mode    of operation: TST, Wx, WxA, or GND MAP.  Once in VP, these  modes  may  be   changed  as  desired.    VP  will engage  from  the  NAV  MAP  mode,  but  NAV  data  will not be displayed during operation. (10)   Weather     /     Weather     Alert     (Wx/WxA) Button.  Alternately selects between the Weather (Wx) and Weather Alert (WxA) modes of operation.  Wx or WxA will appear in the lower left of the display.  When the  WxA  mode  is  selected,  magenta  areas  of  storms flash between magenta and black at a 1 Hz rate. c.   Fault Annunciations.  If  a  fault  occurs,  the  fault  annunciation  will  be presented   on   the   display   unit.      The   two   general categories    of    faults    are    hard    failures    and    soft failure/annunciations. Hard   failures   are   those   which   occur   when   a major function of the system is lost.  Hard failures are typically a total loss of transmitter power, receiver gain, or no antenna  scan.   TURN  OFF  SYSTEM.   Refer  to Table 3A -3 for hard failure annunciations. CAUTION Should    the    system    be    left    on,    further damage to other system components could occur.