TM 1-1510-225-10 3D-6 pointer on the EHSI should be driven to 315° and both the OBS IN and OBS OUT fields should be displaying 315°.      The   RMI   field   always   displays   130°.      The copilot’s RMI should indicate a bearing to the station of 130°. (3)   If  the  KLN  90B  has  passed  the  internal self-test, the bottom left side of the Self-Test page will display   ANNUN   ON   to   indicate   that   the   external annunciators  should  all  be  illuminated.    If  a  flashing TEST  FAIL  is  displayed,  recycle  power  to  the  KLN 90B.    If  the  Self-Test  page  still  displays  TEST  FAIL, the  KLN  90B  requires  repair  and  should  not  be  used for navigation. c.   Correct Time, Date, and Position. (1)   The  KLN  90B  needs  to  have  the  correct time, date, and position to be able to determine which satellites should be in view.  This information is stored in the battery-backed memory of the KLN 90B so it is not  normally  necessary  to  update  it.    If  the  KLN 90B has  the  correct  date,  time,  and  position,  the  time  to NAV  ready  will  usually  be  2  minutes  or  less.    If  this information is not correct, the KLN 90B will start to look for  satellites  to  determine  the  position  of  the  aircraft.   This  process  can  take  as  long  as  12 minutes  but  will normally be around 6 minutes.  It is possible to update this   information   manually,   which   will   allow   the   KLN 90B  to  reach  a  NAV  ready  status  much  faster.    If  the date  and  time  are  correct,  or  acquisition  time  is  not important, proceed to step d. (2)   If  the  date  is  incorrect,  rotate  the  right outer  knob  counterclockwise  until  the  cursor  is  over the  date  field.    Rotate  the  right  inner  knob  until  the correct day of the month is displayed.  Then, rotate the right   outer   knob   one   step   clockwise   to   place   the flashing part of the cursor over the month field.  Rotate the   right   inner   knob   to   display   the   correct   month.   Rotate the right outer knob one step clockwise again and use the right inner knob to select the first digit of the correct year.  Next, rotate the right outer knob one more step clockwise and then use the right inner knob to select the second digit of the year.  When the date is correct, press ENT. (3)   If it is necessary to reset the time, use the right  outer  knob  to  position  the  cursor   over  the  time zone field.  Use the right inner knob to select one of 19 time zones.  UTC – Coordinated Universal Time (Zulu) is always a safe choice.  Then turn the right outer knob one step counterclockwise to position the cursor over the  time  field.    Use  the  right  inner  knob  to  select  the correct hour.  Twenty-four hour time is used.  Now turn the right outer knob one step clockwise to position the flashing   part   of   the   cursor   over   the   first   minutes position.      Turn   the   right   inner   knob   to   select   the desired  value.    Turning  the  right  outer  knob  one  more step  clockwise  positions  the  flashing  cursor  over  the second  minutes  position,  and  the  right  inner  knob  is now  used  to  finalize  the  time  selection.    When  the correct time has been entered, press  ENT to start the clock    running.        The    KLN    90B    system    time    will automatically    be    corrected    very    precisely    once    a satellite is received. d.  Altimeter Setting. (1)   With  the  Army  Engine  Trend  Monitoring (AETM)    system    installed    and    interfaced    with    the appropriate  altimeter,  the  correct  barometric  altimeter setting  is  input  via  the  pilot’s  altimeter.    It  will  not  be possible  to  access  the  BARO  field  on  the  Self-Test page or the Altitude page.  If there is no colon after the BARO field, it cannot be accessed by the pilot with the controls on the KLN 90B. (2)   Turn  the  right  outer  knob  clockwise  to position   the   cursor   over   the   first   two   digits   of   the barometric altimeter setting if the cursor is not already there.  If the correct altimeter setting is displayed, skip to step (4). (3)   To   enter   the   correct   altimeter   setting, rotate the right inner knob to select the first two digits.   Rotate   the   right   outer   knob   one   step   clockwise   to move  the  flashing  cursor  over  the  third  position.   Use the right inner knob to select the correct number.  Use the right outer knob and inner knobs to complete the altimeter setting and press ENT. (4)   With the correct altimeter setting entered, the altitude displayed on line 4 should be correct within 100 feet. e.   Approve   Self-Test   Page.      Turn   the   right outer   knob   clockwise   to    position    the    cursor    over APPROVE?  if  it  is  not  there  already.    Press   ENT to approve  the  Self-Test  page.    Five  beeps  should  be heard when the Self-Test page is approved to confirm altitude  alert  audio.  If  the   GPS  CRS  switch  is  in  the OBS position, the OBS warning page will be displayed and  GPS  CRS  switch  should  be  pushed  so  that  the LEG mode is selected. f.    Acknowledge Self-Test Page. The database  page  will  now  be  displayed  with  the  cursor over     ACKNOWLEDGE?.          Line     1     indicates     the coverage area.  Line 3 will show the date the database expires.  The KLN 90B will still function with an out of data database.