Narco Avionics AT165 TSO Operation Manual - page 4
STARTUP SCREEN
At turn on the startup screen shows Model type and software version.
SETUP
Start with the AT165 Function Selector Switch in the
OFF
position. Hold in the
FUNC
button while turning the
Function Selector Switch to the
SBY
position. Release the
FUNC
button. The AT165 will now be at the
Contrast Adjust
screen. Rotating the Code Selector/Data Entry Switch CW or CCW will adjust the display’s
contrast. Once the desired contrast is achieved pressing the
FUNC
button will save this setting and continue to
the
Display Mode
screen or
Vfr Set
screen (V1.03 or later software).
The
Vfr
Set
screen allows the setting of the code displayed when the
VFR
button is pressed. Rotating the data
entry switch will change the digit value and pressing the data entry switch will change the flashing cursor to the
next digit. Pressing the
FUNC
button will save the new VFR value and continue to the
Display Mode
screen.
The
Display Mode
screen allows three choices for the display: AUTO, POS or NEG. While in this mode,
turning the Data Entry Switch will scroll through these settings.
AUTO – Black letters on a light background switching to light letters on a black background as the
ambient light is reduced.
POS- Black letters on a light background.
NEG – Light letters on a black background.
Once the desired
Display Mode
setting is achieved pressing the
FUNC
button will save this setting and continue
to the
Gray Code Input
screen.
The
Gray Code Input
screen shows the current altitude and the status of each of the Gray code altitude inputs. A
filled box indicates a ground on the altitude input. This screen is used as an aid in installation troubleshooting.
Pressing the
FUNC
button exits the setup procedure.
RECEIVER INTERROGATION DISPLAY
When the At165 is in either
ON
mode or
ALT
mode and is being interrogated by Radar the RCV legend will
appear in the Code window.
CODE SELECTION
Pressing the Code Selector/Data Entry Switch once enables Transponder Code entry. The left most code digit
will begin flashing. Turning the switch selects the code and pushing the switch again moves to the next digit
from left to right. Once code selection has started, all four digits must be set before the code entry is completed.
A total of 5 pushes completes the code entry process. If the switch is inadvertently pressed, it will stop the code
entry process automatically in 10 seconds. The VFR code can subsequently be recalled automatically by
pressing the VFR button. Code entry can not be started if the AT165 is in setup, Count Down Timer set, or
Altitude Buffer set modes.
PRINTED IN U.S.A. REV C JANUARY 2005