TM 1-1520-240-10
3-3-18
CONTROLS/
INDICATOR
FUNCTION
set to DIST/BRG/TIME or
XTK/TKE/KEY.
ENT Key
Enters data into memory (as
set up on keyboard and dis-
played). This key is also
used for paging of displays.
The bottom right corner of
the display indicates “more”
when additional pages are
CONTROLS/
INDICATOR
FUNCTION
available, and “end” when
no additional pages are
available.
CLR Key
Clears last entered charac-
ter when pressed once.
When pressed twice, clears
entire input field of display
keyboard control.
F1 Key
Reserved for future growth.
Figure 3-3-7. Doppler/GPS Navigation System AN/ANS-128B
