Note: Since the STX 165 uses pressure altitude to determine when to turn
on, it will automatically turn off. The pilot should ensure that the unit is
turned to the SBY Mode after landing.
A 1200 squak code is displayed in the upper right quadrant of the units display.
To change the squawk code, rotate the SELECT know once clockwise to place the cursor over the first
digit in the squawk code. Consecutive turns of the SELECT knob will move the cursor progressively
over each digit. Turning the SELECT knob counter clockwise will reverse the travel of the cursor.
Once the cursor is over the digit to be changed, rotate the DATA knob either direct to select the desired
number. Continue this until all the digits have been changed to the new squawk code. Then simply
press enter to activate the new code.
To squawk VFR, simply press the VFR pushbutton. The programmed VFR code will be displayed. If
you push the VFR pushbutton inadvertently and want to return to the previous code, simply press the
VFR code again.
Note: Pressing the VFR pushbutton cycles between the VFR code and the last pilot
programmed code.
Pressing and holding the VFR pushbutton for three seconds causes the display to
go to a large font on only the mode and squawk code are displayed. Pressing the
VFR pushbutton again for three second restores to display to normal.
When power is applied the STX 165 will tun on with the last active squawk code. The pilot can then
change it to the code requested by the controller. The active code is shown in the upper right quadrant
of the display.
6
Mode Selection
The STX 165 automatically turns on in the SBY (standby) mode when external power is applied,
normally via the avionics master switch. The pilot can use the MODE control to select On (mode A )
or ALT (Mode C) if desired. The STX 165 also has the ability to automatically select ALT mode once
the aircraft has taken off and reached at a predetermined altitude AGL. Once this altitude is sensed by
the built-in encoder the STX 165 will automatically turn on to the ALT mode. This altitude is preselected
by the pilot in the User Set up page.
STX 165 Operation
