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 value selected. To change Baro, Decision Height or Vertical Speed, simply push the desired switch button, and rotate the selector knob clockwise to increase or decrease the number. When the system is in entry altitude mode it is decoupled from the autopilot, however, the autopilot will hold the last altitude commanded. After the required altitude value is selected push DTA to remove the “ENT” annunciation and return the system to operate mode. The altitude entry will not be accepted unless the data field is closed by the second push of the data key. In mode entry, the bottom line will show the parameter you can modifiy. In operate mode you will see what is being displayed and the alarms annunciators.

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 operate mode by simply rotating the selector knob.

When the system is initially powered up, the baro mode will be displayed in entry mode immediately after the test cycle. At other times, it will be necessary to select the DTA (Data) button for Data Entry (ENT will be displayed) and then select “baro” which will display the last baro setting. Repeated pushes of the baro button will cause the displayed baro units to alternate between displaying the setting in inches of mercury or millibars. When baro is displayed in millibars, the first two digits are omitted: 1013.2 would display as 13.2 and 1036.9 would show as 36.9.

Adjustment Baro Calibration

Simply rotate the input selector knob, in entry mode, to display the desired baro calibration.

Vertical Speed (VS) Selector

 This version allow a maximum +/- 1600 FPM.

After power up, push the VS button to display the vertical speed and enable the vertical speed selector mode. Click the selector knob to input the desired vertical speed in 100 FPM increments. The maximum climb vertical speed available is + 1600 FPM which will be displayed as + 16. The maximum descent vertical speed is -1600 FPM which will be displayed as -16.

The vertical speed display is the only function that can be accessed directly in the operate mode, therefore, vertical speed changes can be commanded by simply rotating the selector knob. If you are in the “Entry” (ENT) mode you can access the VS Mode by selecting the VS button and then rotating the selector for the desired vertical speed. Pushing VS while in operate mode will hide/display de vertical speed selected.

Altitude (ALT) Select Function

The ALT Mode switch has two functions. When selected in entry mode it will address the altitude selector function as indicated by the “SEL” annunciator flash. Select the desired altitude by rotating the selector knob to input the altitude in thousands and hundreds, i.e. 5500 ft. would be 5.5 (x1000). Reselect “DTA” to return to operate mode - the “SEL” will stop flashing and remain steady with the “ALT” annunciated.

Altitude Read Out

When the “ALT” switch is pushed in operate mode, the “SEL” annunciator will extinguish and the display will show “ALT” and display the current altitude. While in operate mode, repeated pushes of the “ALT” button will alternately display the current or the selected altitude.

Altitude Alert (ALR) Mode

The Altitude Alert Mode switch enables the altitude alert system in conjunction with the selected altitude displayed in ALT SEL Mode. Activation of the ALR switch will display "ALR" indicating arming of the alert mode. The alert mode will cause a chime throughout the cabin audio system and flashing of the “ALR” annunciator when the aircraft is 1000 ft. from the selected altitude and again at 300 ft. from the selected altitude. The alert will also activate if the aircraft deviates from the selected altitude by more than 300 ft. The alert function can be alternately enabled and disabled by pushing the ALR switch. When alert is enabled, the “ALR” annunciation will be visible on the display.

Decision Height (DH) Alert Mode

The Decision Height (DH) Alert Mode will provide altitude alerting at the set DH altitude by activation of the chime and flashing of the DH annunciator. The chime will sound entering and leaving a 100 ft. window at the DH. To set, push DTA for entry, select DH Mode. Rotate the selector knob to obtain the desired DH in meters. After setting the desired DH, push DTA to enter the selected DH. The display will show the selected DH for approximately 5 seconds and will then revert to altitude mode and display the altitude until the DH is reached in the descent. At the set DH window, the DH alert will activate. The alert will sound/flash at 50 ft. above and again at 50 ft. below DH, alerting the pilot that he is at or near the set decision height. The DH Mode can be disabled by pushing the DH switch causing the DH annunciator to extinguish, It is necessary to select DTA and ENT mode to display or enter the DH value or change a DH value, once you have returned to operate mode (ENT extinguished). Repeated activation of the DH button in operate mode will alternately enable or disable the DH mode, without changing the display.

MAN switch

In this version, pushing the “MAN” (Manual) switch which will cause the autopilot to disconnect, showing the display below.