TM 1-1510-225-10 3C-44 CAUTION It is not practical  to provide monitoring for all conceivable system failures and, however unlikely, it is possible that erroneous operation could occur without a fault  indication.    It  is  the  responsibility  of the  pilot  to  detect  such  an  occurrence  by means  of  cross-checks  with  redundant  or correlated    information    available    in    the cockpit. (1)   Equipment     Turn     On.          The     ADF-60 receiver and the CTL -62 ADF control are turned on by rotating   the   power   and   mode   switch   on   the   ADF control to the ANT, ADF, or TONE position. After  power  is  applied,  the  CTL -62  displays  the same  active  and  preset  frequencies  that  were  preset when the equipment was last turned off. (2)   Frequency Selection. Frequency selection  is  made  using  either  the  frequency  select knobs, the XFR / MEM (transfer/memory recall switch). For   future   developments,   the   CTL -62   has   a normal   frequency   range   of   190.00   to   1799.5   kHz.   However,   when   used   with   the   ADF-60,   the   upper frequency is limited to 1749.5 kHz.  Rotation of either frequency   select   knob   increases   or   decreases   the frequency  in the preset frequency display.  The larger outer  knob  changes  the  frequency  in  1000-  and  100- kHz  increments  (first  and  second  numbers  from  the left).  The smaller inner knob changes the frequency in 10's,  units,  and  tenths  kHz  increments  (third,  fourth, and fifth numbers from the left). After  the  desired  frequency  is  set  in  the  preset frequency  display,  it  can  be  transferred  to  the  active frequency  display  by  momentarily  setting  the   XFR  / MEM switch  XFR.    At  the  same  time  that  the  preset frequency   is   transferred   to   the   active   display,   the previously active frequency is transferred to the preset display.  The   ACT  annunciator  on  the  control  flashes while the receiver is tuning to the new frequency. NOTE If  the  ACT  annunciator  continues  flashing, it indicates that the receiver is not tuned to the    frequency    displayed    in    the    active display. The  CTL-62  has  a  memory  that  permits  storing up   to   four   preset   frequencies.      Once   stored,   these frequencies  can  be  recalled  to  the  preset  display  by positioning   the    XFR   /   MEM   switch   to   the    MEM  position.  The storage location (CH 1 through CH 4) for the    recalled    frequency    is    displayed    in    the    active frequency display while the  XFR / MEM switch is held in the  MEM  position.    All  four  stored  frequencies  can be  displayed  one  at  a  time  in  the  preset  display  by repeatedly  positioning  the  XFR  /  MEM   switch  to  the MEM  position.  After the desired stored frequency has been    recalled    to    the    preset    display,    it    can    be transferred    to    the    active    display    by    momentarily positioning the XFR / MEM switch to the XFR position. During normal operation, all frequency selections and revisions are done in the preset frequency display.   However,    the    active    frequency    can    be    selected directly, as described in the following paragraph. (3)   Direct  Active  Frequency  Selection.    The active   frequency   can   be   selected   directly   with   the frequency select knobs by pushing the  ACT button for about   2   seconds.      The   active   frequency   selection mode  is  indicated  by  dashes  appearing  in  the  preset display.    Also,  the   ACT annunciator   will  flash  as  the frequency select knobs are turned to indicate that the transceiver is being re-tuned. NOTE If  the  ACT  annunciator  continues  flashing after  the  frequency  has  been  selected,  it indicates  that  the  receiver  is  not  tuned  to the    frequency    displayed    in    the    active display. To    return    to    the    preset    frequency    selection mode,  merely  push  the   ACT  button  again  for  about 2 seconds.   As   a   safety   feature,   the   CTL-62  automatically switches to the active frequency selection mode when a  frequency  select  knob   is  operated  while  the   STO, TEST, or   XFR  /  MEM  switches  are  actuated,  or  the memory recall inputs to the control are grounded. (4)   Frequency   Storage.    Up  to  four  preset frequencies   can   be   stored   in   the   memory   in   the CTL -62   for   future   recall.      To   program   the   memory, select  the  frequency  in  the  preset  frequency  display using  the  frequency  select  knob  and  push  the  STO button   once.      One   of   the   channel   numbers   (CH   1 through  CH  4)  will  appear  in  the  active  display  for approximately    5    seconds.        During    this    time,    the channel number can be changed without changing the preset frequency by momentarily positioning the XFR / MEM  switch  to  the   MEM   position.    After  the  desired channel   number   has   been   selected,   push   the   STO button again to store the frequency.