Trio Avionics EZ Pilot - v 1.9 - Manual (Page 9)

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crosstrack error (XTK) magnitude. The unit will sequence automatically from INT to TRK
if the track error magnitude is below approximately 0.5 miles (intercept distance
increases with speed). The precise switching distance is displayed as IDS on the upper
right data field when the INT mode is selected. Also, sequencing the mode from CRS to
INT is not possible if the track error is below this variable limit. (At any time while in the
INT mode the pilot may transition to the TRK mode, or through TRK to CRS mode, by
pressing the MODE switch.)
3.1.3 Servo Power Switch
The servo power switch controls power
application to the EZ Pilot servo. When the
SERVO LED is unlighted servo power is
interrupted. This power interruption
disconnects the EZ Pilot completely from
the control system. When the LED is
illuminated the EZ Pilot is providing servo
power and control signals to the autopilot
servo. The servo is turned on or off
(disconnected) by pressing this switch
momentarily. A remote Servo disconnect
switch should also be mounted on the
aircraft control stick (strongly
recommended). When implemented, this
switch will provide important additional
functionality (PCS mode steering).
3.1.4 Display Switch
The Display Switch performs 6 functions, as follows:
1 - Display Data Fields
The DISPLAY switch selects what data is presented on the variable fields of the display.
Momentarily pressing (“bumping”) the display switch advances the lower right line
variable display field through the available selections. Pressing and holding the display
button then toggling the L-R switch advances the upper right variable display field
through its display selections (see function 5 below). The displays available are
described in section 3.2.14.
2 - Display Brightness Control
Display brightness control is also accomplished using the front panel DISPLAY switch or
a remote display dimming switch. Pressing the front panel switch and holding it
approximately one second, then releasing the switch
, will change the display brightness
level. The DISPLAY switch should be momentarily released after the next dimming
setting is obtained to prevent cycling to the calibration mode (Function 3 below). The
remote display dimming switch, however, steps the display through the dimming levels
each time it is pressed and will initiate the display scanning mode. (There is an option to
reassign the remote dimming switch to MODE switching but the DISPLAY switch on the
front panel will still perform the dimming function and start or stop the scanning mode.)
3 - Entering “Calibration Mode”
Pressing and holding the DISPLAY switch for more than five seconds causes entry into
the CALIBRATION MODE for fine tuning of the autopilot tracking algorithms (all models)