TM 1-1510-224-10 been  selected.    The  0  in  channel  display  will  become blank. 5. Continue    moving    cursor    and    changing digits   until   desired   frequency   appears   in display. 6. Frequency/channel   selector   switch   Stow cursor  by  depressing  repeatedly  until  no digit is left flashing. NOTE Keying  the  microphone  momentarily will also stow the cursor. 7. Antenna   coupler   -   Tune   by   keying   radio momentarily.        During    antenna    coupler tuning   process,   TX   on   display   will   flash and frequency numbers will be blank. 8. When  TX  annunciator  stops  flashing  and frequency reappears, antenna tuning cycle   is   complete   and   radio   is   ready   to transmit on the selected frequency. NOTE Always key the radio after selecting a new    frequency    to    initiate    antenna tuning.    Otherwise  poor  reception  or failure to hear a ground station which is calling you may be experienced. (2) Programming simplex preset channels. .1 Emission  mode  selector  switch  -   USB   or AM. 2. Frequency/channel selector switch - Depress  repeatedly  until  channel  number is flashing. 3. Frequency/channel  selector  switch  -  Twist to select desired channel number. Previously programmed receive frequency associated  with  that  channel  number  will appear in display. 4. Frequency/channel selector switch - Depress  repeatedly  until  cursor  is  at  digit to be changed. NOTE The  first  one  or  two  digits  (MHz)  of the    frequency    are    shown    on    the upper   right   portion   of   the   display, while  the  last  four  digits  (kHz)  of  the frequency are displayed on the bottom of the display. 5. Frequency/channel  selector  switch  -  Twist knob until desired number has been    selected.        A    flashing    dash    will appear    to    right    of    channel    number    to indicate    that    transceiver    is    in    program mode. 6. Continue    moving    cursor    and    changing digits   until   desired   frequency   appears   in display. NOTE The  program  mode  may  be  exited  at any   time   and   the   previously   stored frequency    returned    by    keying    the microphone. 7. Store  switch  -  Depress  to  store  frequency in     receive     portion     of     memory.          TX annunciator    will    flash    to    indicate    that memory    is    ready    to    receive    transmit frequency. 8. Store  switch  -  Depress  a  second  time  to store  frequency  in  the  transmit  portion  of the memory if entering a simplex frequency. 9. If  entering  a  semi-duplex  frequency,  use frequency/channel   selector   switch   to   set transmit frequency in display. 10. Store  switch  -  Depress  to  enter  transmit frequency  into  memory.    Cursor  will  stow and flashing dash will disappear to indicate  that  HF  control-display  unit  is  no longer in program mode. 11. Antenna   coupler   -   Tune   by   keying   radio momentarily.        During    antenna    coupler tuning   process,   TX   on   display   will   flash and frequency numbers will be blank. 12. When  TX  annunciator  stops  flashing  and frequency reappears, antenna tuning cycle is complete and transceiver is ready to transmit on the selected frequency. NOTE Always   key   radio   after   selecting   a new    frequency    to    initiate    antenna tuning.    Otherwise  poor  reception  or failure to hear a ground station which is calling you may be experienced. (3) Programming semi-duplex preset channels. 1. Emission  mode  selector  switch  -   USB   or AM. 2. Frequency/channel selector switch - Depress  repeatedly  until  channel  number is flashing 3-13