S-TEC ST360, Pilot Operating Handbook

Page: 9 / 24

9
Features and Functions
Self Test
When power is applied, the Altitude Selector Alerter will conduct an
internal self test of the computer electronic elements, the display and an-
nunciations and the altitude alerter audio tone (a two tone "ding dong").
Successful test conclusion is indicated by the display of the barometric
setting of 29.9 after completion of the test cycle.
Data (DTA) Entry - Operate
The DTA (Data) Switch button is used to select between data entry
and operate modes. When the DTA button is selected, the display will
show “ENT” to indicate entry mode and the SEL annunciator will flash
to indicate that an entry will change the altitude selected. To change
Baro, Decision Height or Vertical Speed, simply push the desired switch
button and rotate the selector knob clockwise (CW) to increase the num-
ber and counter clockwise (CCW) to decrease the number. Pull the selec-
tor knob out (detent) to change decimal numbers.
When the system is in entry mode it is decoupled from the autopilot,
however, the autopilot will hold the last vertical speed commanded.
After the required values are selected, push DTA to remove the “ENT”
annunciation and return the system to operate mode. The entry will not
be accepted unless the data field is closed by the second push of the data
key.
NOTE: In entry mode, only the altitude select mode annunciator
will be active when “ALT” is selected - the actual altitude can not
be called up to the display.
NOTE: It is not necessary to select DTA Mode to enter vertical
speed changes. Vertical speed inputs can be made directly in op-
erate mode by simply rotating the selector knob.