Aspen Avionics AT300 Manual

AT300 Operating Procedures and Installation Manual
AT300 Operating Procedures and Installation ManualAT300 Operating Procedures and Installation Manual
AT300 Operating Procedures and Installation Manual
DOCUMENT A-01-104-00 PAGE 1/41 REVISION B
AT300
AT300AT300
AT300 Hazard Awareness Display
Hazard Awareness DisplayHazard Awareness Display
Hazard Awareness Display
Operating Procedures
Operating ProceduresOperating Procedures
Operating Procedures
And
AndAnd
And
Installation
InstallationInstallation
Installation Manual
ManualManual
Manual
Aspen Avionics
Aspen AvionicsAspen Avionics
Aspen Avionics Document
DocumentDocument
Document Number:
Number:Number:
Number: A
AA
A-
--
-01
0101
01-
--
-104
104104
104-
--
-00
0000
00

AT300 Operating Procedures and Installation Manual
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DOCUMENT A-01-104-00 PAGE 2/41 REVISION B
Document Revisions
Document RevisionsDocument Revisions
Document Revisions
Revision
RevisionRevision
Revision Description
DescriptionDescription
Description of Change
of Changeof Change
of Change ECO
ECOECO
ECO
A Initial Release 1021
B Incorporation of TSO unit functionality and expanded
description of system operation. Addition of installation
limitations and operational notes, cautions and warnings
associated with certified installations.
1051
Prepared By: JDB
Release Authorization
Release AuthorizationRelease Authorization
Release Authorization
Reviewed By: PDL
Original signatures
on file. See ECO
for release date
and dispositions.
Release Date: 9/29/05
Release Initials: JDB
Usage Authorization / Master Control Number:
Release Signature: Jeff Bethel

AT300 Operating Procedures and Installation Manual
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DOCUMENT A-01-104-00 PAGE 3/41 REVISION B
Aspen Avionics
Aspen AvionicsAspen Avionics
Aspen Avionics –
––
– Limited Warranty
Limited WarrantyLimited Warranty
Limited Warranty
This product is warranted to be free from defects in material and workmanship
for a period of 24 months from date of installation or purchase from an Aspen
Authorized Dealer, whichever is later. Within this period Aspen will, at its sole
option, repair or replace any product, product component, or software that fails in
normal use. Such repairs shall be made at no cost to the customer for parts and
labor only. This warranty does not apply to any ASPEN Products or Product
Components which have been (1) repaired or modified by persons unauthorized
by ASPEN so that, in ASPEN’S sole judgment, the performance or reliability is
adversely affected thereby; or (2), subjected to misuse, abuse, neglect, accident,
or weather related damage.
THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER
WARRANTIES. ASPEN MAKES NO OTHER WARRANTIES, EXPRESS OR
IMPLIED OR STATUTORY, INCLUDING WITHOUT LIMITATION, ANY
WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A
PARTICULAR PURPOSE, STATUTORY OR OTHERWISE. ASPEN SHALL
NOT BE LIABLE FOR LOSS OR DAMAGES OF ANY KIND, INCLUDING
WITHOUT LIMITATION, LOST OR ANTICIPATED PROFITS, DELAY,
INCIDENTAL, CONSEQUENTIAL OR SPECIAL DAMAGES ARISING OUT OF
THE USE, MISUSE, OR INABILITY TO USE ANY ASPEN PRODUCTS SOLD
HEREUNDER, OR FROM ANY DEFECTS IN THE PRODUCT. Some states do
not allow the exclusion of incidental or consequential damages, so the preceding
limitations may not apply to you.
ASPEN retains the exclusive right at its sole option to repair or replace the unit,
or offer a full refund for the original purchase price of the unit. SUCH REMEDY
SHALL BE THE SOLE AND EXCLUSIVE REMEDY FOR ANY BREACH OF
WARRANTY.
If you require warranty service you may contact your local Aspen Authorized
Dealer or you may contact Aspen Avionics directly. An original or copy of the
sales receipt from the original Aspen Authorized dealer will be required to obtain
any warranty service.

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DOCUMENT A-01-104-00 PAGE 4/41 REVISION B
Table of Contents
Table of ContentsTable of Contents
Table of Contents
1
11
1Introduction
IntroductionIntroduction
Introduction ................................
................................................................
................................................................
................................................................
................................................................
................................................................
....................................................
........................................
.................... 6
66
6
1.1 Applicability ............................................................................................................... 6
1.2 AT300 Product Overview............................................................................................. 6
1.3 Non-TSO Functions .................................................................................................... 7
2
22
2Specifications
SpecificationsSpecifications
Specifications ................................
................................................................
................................................................
................................................................
................................................................
................................................................
..................................................
....................................
.................. 8
88
8
2.1 Physical Specifications ................................................................................................ 8
2.2 Operational Specifications .......................................................................................... 8
2.3 I/O Specifications ....................................................................................................... 8
2.4 Certification (P/N A-05-102-00 Only) ........................................................................ 8
3
33
3General System Operat
General System OperatGeneral System Operat
General System Operation
ionion
ion................................
................................................................
................................................................
................................................................
................................................................
................................................................
................................ 9
99
9
3.1 Startup ....................................................................................................................... 9
3.2 User Interface ............................................................................................................. 9
3.3 Cursor Control.......................................................................................................... 10
3.4 Terrain Presentation ................................................................................................. 12
3.5 Cold Temperature Operations................................................................................... 13
3.6 Vertical Speed Display .............................................................................................. 14
3.7 Rising Terrain Bar ..................................................................................................... 15
3.8 Height Above Ground Digital Indication .................................................................... 16
3.9 GPS Course Line ....................................................................................................... 16
3.10 Airport Locations...................................................................................................... 17
3.11 Obstructions............................................................................................................. 17
3.12 System Status Messages ........................................................................................... 18
3.13 Database Updating ................................................................................................... 19
4
44
4Installation
InstallationInstallation
Installation ................................
................................................................
................................................................
................................................................
................................................................
................................................................
....................................................
........................................
.................... 20
2020
20
4.1 Equipment Description ............................................................................................. 20
4.2 Installation Preparation............................................................................................. 20
4.3 TSO Installation Statement........................................................................................ 21
4.4 Equipment Installation Limitations ............................................................................ 21
4.5 Installation Steps (Summary)..................................................................................... 25
4.6 Interfaces ................................................................................................................. 25
4.7 Mounting Location.................................................................................................... 25
4.8 Optimal Viewing Angle ............................................................................................. 26
4.9 Mounting Method ..................................................................................................... 26
4.10 Pneumatic Connections ............................................................................................ 26
4.11 Electrical Connections............................................................................................... 27
5
55
5Post Installation Checkout
Post Installation CheckoutPost Installation Checkout
Post Installation Checkout................................
................................................................
................................................................
................................................................
..............................................................
............................................................
.............................. 33
3333
33
5.1 Data Monitor Function .............................................................................................. 33
5.2 Interface Verification ................................................................................................ 34
5.3 Demo Mode Function................................................................................................ 34
5.4 Trouble Shooting Guide: ........................................................................................... 36
6
66
6Continued Airworthiness
Continued AirworthinessContinued Airworthiness
Continued Airworthiness................................
................................................................
................................................................
................................................................
................................................................
................................................................
................................ 37
3737
37
6.1 Database Updating ................................................................................................... 37

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6.2 Periodic Maintenance and Calibration ....................................................................... 37
7
77
7Environmental Qualification Form
Environmental Qualification FormEnvironmental Qualification Form
Environmental Qualification Form................................
................................................................
................................................................
................................................................
...................................................
......................................
................... 37
3737
37
8
88
8Serial Interface Specification
Serial Interface SpecificationSerial Interface Specification
Serial Interface Specification ................................
................................................................
................................................................
................................................................
..........................................................
....................................................
.......................... 37
3737
37
9
99
9Warranty Registration Card
Warranty Registration CardWarranty Registration Card
Warranty Registration Card ................................
................................................................
................................................................
................................................................
............................................................
........................................................
............................ 37
3737
37
Table of Figures
Table of FiguresTable of Figures
Table of Figures
Figure 1 - AT300 Product Image............................................................................................... 6
Figure 2 - Screen Layout .......................................................................................................... 9
Figure 3 - Top Block Data Presentation................................................................................... 10
Figure 4 - Manual Dimming Menu .......................................................................................... 11
Figure 5 - Vertical Speed Display ............................................................................................ 15
Figure 6 - Rising Terrain Bar...................................................................................................16
Figure 7 - Height Above Ground............................................................................................. 16
Figure 8 - GPS Course Line ..................................................................................................... 17
Figure 9 - Airport Icon ........................................................................................................... 17
Figure 10 - Obstruction Icon .................................................................................................. 17
Figure 11 - System Interfaces ................................................................................................. 25
Figure 12 - Installation Location............................................................................................. 25
Figure 13 - Left/Right, Top/Bottom Viewing Cone .................................................................. 26
Figure 14 - Installation Connector Kit..................................................................................... 27
Figure 15 - Crimping Tools .................................................................................................... 28
Figure 16 - Connector Housing Assembly............................................................................... 28
Figure 17 - Connector Pin Numbers ....................................................................................... 29
Figure 18 – AT300 Main Connector Pin-out ............................................................................ 29
Figure 19 - Commonly Used Pins............................................................................................ 30
Figure 20 - Wiring Diagram .................................................................................................... 30
Figure 21 - Common GPS Serial Interface Connections............................................................ 32
Figure 22 - Data Monitor Screen............................................................................................. 33
Figure 23 - Serial Navigation Message Format ........................................................................ 37
Figure 24 - Serial Waypoint Interface Specification.................................................................. 37

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1
11
1Introduction
IntroductionIntroduction
Introduction
1.1
1.11.1
1.1 Applicability
ApplicabilityApplicability
Applicability
This operating procedures and installation manual describes the operation, installation
planning, installation, and post-installation checkout for the Aspen Avionics AT300
Hazard Awareness Display.
This installation manual is applicable to part numbers:
A-05-101-00 AT300 (Non-Certified)
A-05-102-00 AT300 (FAA TSO)
1.2
1.21.2
1.2 AT300
AT300AT300
AT300 Product
ProductProduct
Product Overview
OverviewOverview
Overview
The AT300 is a panel mounted instrument that is intended to replace the industry
standard Vertical Speed Indicator (VSI) located in most general aviation aircraft. The
AT300 incorporates a high-resolution, sunlight readable, color active-matrix liquid
crystal display (TFT LCD). As the AT300 provides additional functionality beyond that
of the VSI, additional electrical interfaces are required. In addition to an RS232 serial
input from a panel mount GPS system, the AT300 requires a single power input from
the aircraft power system, and an associated ground connection
Figure
FigureFigure
Figure 1
11
1 -
--
- AT300
AT300AT300
AT300 Product
ProductProduct
Product Image
ImageImage
Image
The AT300 provides replacement VSI functionality by displaying both a vertical tape
and numerical presentation of the current vertical speed. VSI is internally computed by

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the AT300 by monitoring the aircraft static pressure, similar to a standard VSI
instrument. This functionality requires interface to the aircraft pitot static line.
In addition to providing terrain situational awareness, the AT300 also provides a
supplemental moving map display of GPS navigation information. The AT300 presents
aircraft position, track and altitude relative to surrounding terrain, by means of color
coding nearby terrain based on the vertical separation between the terrain and the
aircraft.
To support this functionality, aircraft barometric altitude data is obtained by measuring
ambient pressure via the aircraft static connection, and baro corrections are required
to be manually entered through the systems user interface (UI). In addition, the AT300
provides a supplemental display of GPS navigation data, including presentation of the
current waypoint and identifier, and the current navigation leg in the moving map
display area.
In addition, a supplemental display of the current GPS waypoint identifier, distance to
go, desired track, ground speed, and estimated time enroute are presented on the
unit, enabled by the AT300’s RS-232 serial line connection to the GPS navigation
system.
1.3
1.31.3
1.3 Non
NonNon
Non-
--
-TSO Functions
TSO FunctionsTSO Functions
TSO Functions
The following non-TSO functions are included in the AT300, and were evaluated by the
FAA Certification Offices as part of the AT300 TSO Authorization:
Plan view advisory terrain moving map
Plan view supplemental GPS active and next course line with waypoint icons
Supplemental GPS text nav data (Waypoint ID, Distance, DTK, GS ETE)
Advisory Height above terrain digital value
Advisory rising terrain symbol
Monitor Mode
Demo Mode

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2
22
2Specifications
SpecificationsSpecifications
Specifications
2.1
2.12.1
2.1 Physical Specifications
Physical SpecificationsPhysical Specifications
Physical Specifications
Part Number: A-05-101-00, A-05-102-00
Width: 3.33 in. (Measured at bezel)
Height: 3.33 in. (Measured at bezel)
Can Depth: 3.4 in. (Front bezel to rear can)
Overall Depth: 4.25 in. (Knob to rear connectors)
Weight: 1.1 lbs
Display: 2.5" Diagonal TFT Active Matrix LCD (240 x 480)
Face: Anti-Reflective Coated Glass (400nm – 700nm)
Backlight: High Intensity White LED
Rotary Knob: Optical encoder with momentary push
Dimming: Automatic – Front bezel mounted sensor
2.2
2.22.2
2.2 Operational Specifications
Operational SpecificationsOperational Specifications
Operational Specifications
Operating Temp: -20ºC to +55ºC
Storage Temp: -55ºC to +85ºC
Maximum Unpressurized Operating Altitude: 35,000 feet
Maximum Operating Altitude (Ambient): 45,000 feet
Maximum VSI Rate (Digital Display): ±9,900 FPM
Cooling: Not Required
Humidity Max: 95% at 50C
Input Voltage: +12 to +32 Volts DC
Current: 1.0 Amps (Max)
Design Eye Viewing Envelope: 30º Left/Right & 30º Down to 45º Up
Between 10 and 45 inches
2.3
2.32.3
2.3 I/O Specifications
I/O SpecificationsI/O Specifications
I/O Specifications
GPS Input: RS-232 “Avionics Format” Serial Output (9600 Baud, NP, 8 Data
Bits, 1 Stop Bit) used in IIMorrow, ArNav, Bendix King, Free Flight,
Garmin, Garmin AT, Honeywell, Trimble, and UPS AT panel mount
GPS navigation systems.
Static Pressure: 1/8” NPT Threaded fitting (Female on Unit)
Weather Input: RS-232 (Currently not Implemented)
2.4
2.42.4
2.4 Certificatio
CertificatioCertificatio
Certification (P
n (Pn (P
n (P/N
/N/N
/N A
AA
A-
--
-05
0505
05-
--
-102
102102
102-
--
-00 Only)
00 Only)00 Only)
00 Only)
TSO: TSO-C8d (Vertical Velocity Instruments) - Type B, TSO C113
Airborne Multipurpose Electronic Displays
Software: RTCA DO-178B Level D
Environmental: RTCA DO-160E
Categories: See Environmental Qualification Sheet

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3
33
3General System
General SystemGeneral System
General System Operation
OperationOperation
Operation
3.1
3.13.1
3.1 Startup
StartupStartup
Startup
The unit performs a power-on self test immediately following application of power.
During these tests the unit verifies and displays the status of various internal hardware
systems, and also displays the version identification of the operating software and
internal databases. Operational limitations are presented, which must be accepted via
a knob press.
After the self-test, the unit will switch to the default map mode and will display the
“NO GPS” message until valid GPS navigation data is supplied by the navigator.
3.2
3.23.2
3.2 User Interface
User InterfaceUser Interface
User Interface
The following data fields are presented:
Figure
FigureFigure
Figure 2
22
2 -
--
- Screen Layout
Screen LayoutScreen Layout
Screen Layout
Top Bloc
Top BlocTop Bloc
Top Block
kk
k
Shows either side terrain profile, or
GPS Navigation data
Range
RangeRange
Range
Displays the currently selected
range (5nm to 100nm)
Height Above Ground Level
Height Above Ground LevelHeight Above Ground Level
Height Above Ground Level
When below 20,000 ft AGL, shows
approximate height above ground,
rounded to the nearest 100 foot.
Own
OwnOwn
Own-
--
-ship P
ship Pship P
ship Position
ositionosition
osition
Position of aircraft on screen
Vertical Speed Ba
r
Vertical S
p
eed BarVertical S
p
eed Ba
r
Vertical Speed Bar
Vertical speed value shown
graphically, relative to tick-marks
and fixed values shown on bezel
(+2000 fpm to – 2000 fpm)
Vertical Speed Value
Vertical Speed ValueVertical Speed Value
Vertical Speed Value
Vertical speed value shown in
numerical format
(+9900 fpm to -9900 fpm)
Baro Setting
Baro SettingBaro Setting
Baro Setting
Currently set baro value
GPS Track
GPS TrackGPS Track
GPS Track
Current GPS track as received by
the GPS navigator – shown
relative to magnetic north
Control Knob
Control KnobControl Knob
Control Knob
Move cursor by pressing, change
value at cursor by rotating
(Press and hold for dimming
menu)
Rising Terrain Bar
Rising Terrain BarRising Terrain Bar
Rising Terrain Bar
Graphical indication of ground
level
Top Block
Top BlockTop Block
Top Block
Shows either side terrain profile, or
GPS Navigation data

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Figure
FigureFigure
Figure 3
33
3 -
--
- Top Block Data Presen
Top Block Data PresenTop Block Data Presen
Top Block Data Presentation
tationtation
tation
3.3
3.33.3
3.3 Cursor Control
Cursor ControlCursor Control
Cursor Control
Cursor control is accomplished by moving the cursor between three selectable fields
on the screen and modifying the selected value. The current cursor position is
indicated by the selected field being highlighted in GREEN.
The cursor is advanced by momentarily pressing and releasing the control knob, which
will sequence the cursor clockwise between editable fields on the screen (currently 3
fields are editable).
Once the cursor is in a given field, the value of that field is changed by rotating the
knob left and right.
3.3.1
3.3.13.3.1
3.3.1 Editing the Baro Setting
Editing the Baro SettingEditing the Baro Setting
Editing the Baro Setting
The AT300 uses internally computed barometric altitude to render terrain and
obstacles in the appropriate colors. To ensure correct terrain presentation, the
baro setting must to be set to the correct and current baro value. This is
accomplished by moving the cursor to the baro setting field (default on power-
up), and rotating the knob left and right to adjust the value.
Own
OwnOwn
Own-
--
-Ship
ShipShip
Ship
Own-ship position is on left;
Stays fixed while terrain moves
to left as flight progresses
Color cod
Color codColor cod
Color coded terrain
ed terrained terrain
ed terrain
Rising terrain along flight path,
white range markers
Top
TopTop
Top-
--
-Block Nav Data
Block Nav DataBlock Nav Data
Block Nav Data
Shows GPS navigation data
Waypoint ID
Waypoint IDWaypoint ID
Waypoint ID
Destination waypoint identifier
Distance to Waypoint
Distance to WaypointDistance to Waypoint
Distance to Waypoint
Distance to waypoint in NM
Bearing Pointer
Bearing PointerBearing Pointer
Bearing Pointer
Left or right arrow shown when the difference
between the current track and the bearing to the
active GPS waypoint exceeds 5 degrees
GPS Ground Speed
GPS Ground SpeedGPS Ground Speed
GPS Ground Speed
Ground speed in knots
Time to Waypoint
Time to WaypointTime to Waypoint
Time to Waypoint
Estimated time en-route, shown
in hours : minutes
Desired Track to Waypoint
Desired Track to WaypointDesired Track to Waypoint
Desired Track to Waypoint
Digital value of the desired track to the active
GPS waypoint
Top
TopTop
Top-
--
-Block Side
Block SideBlock Side
Block Side-
--
-View
ViewView
View
Shows rising terrain directly
along flight path

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WARNING
WARNINGWARNING
WARNING
Failure to set the correct baro setting on the AT300 will
Failure to set the correct baro setting on the AT300 willFailure to set the correct baro setting on the AT300 will
Failure to set the correct baro setting on the AT300 will
result i
result iresult i
result in incorrect presentation of terrain and obstacle
n incorrect presentation of terrain and obstaclen incorrect presentation of terrain and obstacle
n incorrect presentation of terrain and obstacle
information. Baro setting should be set and updated to
information. Baro setting should be set and updated toinformation. Baro setting should be set and updated to
information. Baro setting should be set and updated to
the correct value at all times.
the correct value at all times.the correct value at all times.
the correct value at all times.
3.3.2
3.3.23.3.2
3.3.2 Selecting the Nav Data / Side Profile Terrain Display
Selecting the Nav Data / Side Profile Terrain DisplaySelecting the Nav Data / Side Profile Terrain Display
Selecting the Nav Data / Side Profile Terrain Display
The top block can be toggled between showing GPS navigation data or terrain
side profile. This is accomplished by moving the cursor to the top block field
(the field will be outlined in green when selected), and rotating the knob left for
the terrain profile, and right for the navigation data.
3.3.3
3.3.33.3.3
3.3.3 Editing the Range Select
Editing the Range SelectEditing the Range Select
Editing the Range Selection
ionion
ion
The range can be set to various ranges between 5nm and 100nm. This is
accomplished by moving the cursor to the range field and rotating the knob left
for smaller values, and right for larger values.
3.3.4
3.3.43.3.4
3.3.4 Manually Adjusting Display Backlight Intensity
Manually Adjusting Display Backlight IntensityManually Adjusting Display Backlight Intensity
Manually Adjusting Display Backlight Intensity
Display backlight intensity is initialized in the “auto-dimming mode” at each
power cycle. In this mode the display brightness is automatically adjusted
based on the ambient light detected by the photocell located to the right of the
main LCD display.
Pressing and holding the control knob in for several seconds activates a manual
dimming menu, which allows the automatic setting to be over ridden and the
brightness to be manually adjusted. Once the manual dimming menu is
presented, rotate the control knob clockwise to increase and counter clockwise
to decrease the brightness. A scale is provided to indicate the selected
backlight level.
Figure
FigureFigure
Figure 4
44
4 -
--
- Manual Dimming Menu
Manual Dimming MenuManual Dimming Menu
Manual Dimming Menu
BRIGHT ADJUST
MIN AUTO MAX
PUSH TO EXIT
Auto Dimming Mark
Auto Dimming MarkAuto Dimming Mark
Auto Dimming Mark

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To set the unit back into the auto dimming mode, turn the knob until the
manual brightness corresponds to the auto-set level, indicated by a white
vertical line within the backlight intensity setting scale area. Auto dimming
mode is selected when the end of the brightness scale is set to the vertical white
line and the “AUTO” legend color changes from white to green.
The brightness menu will remain in view until the pilot exits the menu by
momentarily pushing the control knob.
3.4
3.43.4
3.4 Terrain Presentation
Terrain PresentationTerrain Presentation
Terrain Presentation
Terrain is color coded relative to the aircraft position, track and altitude. Two distinct
color coding methods are utilized – one for normal en-route operations, and a second
for ground/landing/departure operations.
CAUTION
CAUTIONCAUTION
CAUTION
Evasive maneuvers based solely on this terrain map
Evasive maneuvers based solely on this terrain mapEvasive maneuvers based solely on this terrain map
Evasive maneuvers based solely on this terrain map
display are not authoriz
display are not authorizdisplay are not authoriz
display are not authorized. Moving Map Approved for
ed. Moving Map Approved fored. Moving Map Approved for
ed. Moving Map Approved for
Strategic Planning Purposes Only
Strategic Planning Purposes OnlyStrategic Planning Purposes Only
Strategic Planning Purposes Only.
..
.
3.4.1
3.4.13.4.1
3.4.1 Enroute Mode (“Normal Operation”)
Enroute Mode (“Normal Operation”)Enroute Mode (“Normal Operation”)
Enroute Mode (“Normal Operation”)
The Enroute Mode is active when not operating in the close proximity of an
airport. In these conditions, terrain profiles from 2500 feet below to 3000 feet
above the aircraft are shown, giving excellent awareness of surrounding terrain
before it becomes a threat.
The following colors are used to render the AT300 terrain map based upon the
approximate proximity of terrain to the current aircraft baro corrected altitude.
Greater than 2500 below:
Greater than 2500 below:Greater than 2500 below:
Greater than 2500 below: Black (No Terrain Shown)
Black (No Terrain Shown)Black (No Terrain Shown)
Black (No Terrain Shown)
2500 to 1500 feet below:
2500 to 1500 feet below:2500 to 1500 feet below:
2500 to 1500 feet below: Light Green
Light GreenLight Green
Light Green
1500 to 500 feet below:
1500 to 500 feet below:1500 to 500 feet below:
1500 to 500 feet below: Dark Green
Dark GreenDark Green
Dark Green
500 feet
500 feet500 feet
500 feet below
belowbelow
below to
toto
to same as aircraft altitude
same as aircraft altitudesame as aircraft altitude
same as aircraft altitude:
::
: Yellow
YellowYellow
Yellow
Aircraft altitude
Aircraft altitudeAircraft altitude
Aircraft altitude to 1500 feet above:
to 1500 feet above:to 1500 feet above:
to 1500 feet above: Red
RedRed
Red
1500 to 3000 feet above:
1500 to 3000 feet above:1500 to 3000 feet above:
1500 to 3000 feet above: Magenta
MagentaMagenta
Magenta
Greater than 3000 feet above:
Greater than 3000 feet above:Greater than 3000 feet above:
Greater than 3000 feet above: White
WhiteWhite
White
Terrain boundary area with no terrain
Terrain boundary area with no terrainTerrain boundary area with no terrain
Terrain boundary area with no terrain
coverage
coveragecoverage
coverage
Cyan
CyanCyan
Cyan

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3.4.2
3.4.23.4.2
3.4.2 Ground/Landing/Departure Mode
Ground/Landing/Departure ModeGround/Landing/Departure Mode
Ground/Landing/Departure Mode
Ground, Landing and Departure modes are active when operating in close
proximity to the airport area. Using internal logic that incorporates knowledge
of the aircraft position, track, and altitude, the AT300 will determine the current
aircraft flight phase. When on the ground, or during the landing or departure
phases of flight, the AT300 will only render terrain that is more than 100’ above
the aircraft’s current baro-corrected altitude. Any terrain that is less than 100’
above the current baro-corrected altitude, including all terrain below the
aircraft, is not rendered. The Ground, Landing and Departure mode is
automatically entered without any pilot action.
This sophisticated phase-of-flight logic ensures that rising terrain in the airport
vicinity that is of interest during departure climb-out or go-around is always
displayed, while simultaneously ensuring that expected terrain in the immediate
airport vicinity is not presented in red during routine close-to-ground flight
operations.
While in the Ground, Landing or Departure mode, the following colors are used
to render the AT300 terrain map based upon the approximate proximity of
terrain to the current aircraft baro corrected altitude.
Less
LessLess
Less than
thanthan
than 100
100100
100 above
aboveabove
above:
::
: Black (No Terrain Shown)
Black (No Terrain Shown)Black (No Terrain Shown)
Black (No Terrain Shown)
100
100100
100 to 1500 feet above:
to 1500 feet above:to 1500 feet above:
to 1500 feet above: Red
RedRed
Red
1500 to 3000 feet above:
1500 to 3000 feet above:1500 to 3000 feet above:
1500 to 3000 feet above: Magenta
MagentaMagenta
Magenta
Greater than 3000 feet above:
Greater than 3000 feet above:Greater than 3000 feet above:
Greater than 3000 feet above: White
WhiteWhite
White
Terrain boundary area with no terrain
Terrain boundary area with no terrainTerrain boundary area with no terrain
Terrain boundary area with no terrain
cover
covercover
coverage
ageage
age
Cyan
CyanCyan
Cyan
3.5
3.53.5
3.5 Cold Temperature Operations
Cold Temperature OperationsCold Temperature Operations
Cold Temperature Operations
The AT300 uses baro-corrected altitude to render the color-coded terrain map. As is
detailed in the Aeronautical Information Manual and the Instrument Flying Handbook,
baro-corrected altitude is subject to known errors when the temperature at the
altimeter setting station varies significantly from standard temperatures.
The magnitude of this altimeter error is a function of both the temperature at the
ground station providing the altimeter setting, and the height difference between the
aircraft and the altimeter setting station’s elevation. Colder outside air temperatures
and large differences in height between the aircraft and the ground station will
produce larger errors. During operations when the temperature at the altimeter
setting station is lower than ICAO standard temperature, the aircraft true altitude will
be lower than the aircraft’s indicated altitude.

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The AT300 relies upon the same barometric corrections and principles of altimetry as a
standard mechanical altimeter, and is therefore subject to these same errors. During
flight operations where the temperature is below ICAO standard conditions, the AT300
will show terrain clearances that are greater than actual. The further the temperature
is from ICAO standard temperature, and the greater the separation between the aircraft
altitude and the elevation of the reporting station, the larger the errors. Extreme
caution should be exercised whenever flight operations are conducted in cold
temperatures to ensure that adequate terrain clearance exists.
The AT300 is not acceptable for use as the sole means of determining the aircraft’s
terrain separation.
WARNING
WARNINGWARNING
WARNING
During
DuringDuring
During flight
flightflight
flight operations
operationsoperations
operations when the outside temperature is
when the outside temperature iswhen the outside temperature is
when the outside temperature is
below ICAO standard conditions, the AT300
below ICAO standard conditions, the AT300below ICAO standard conditions, the AT300
below ICAO standard conditions, the AT300 will show
will showwill show
will show
terrain clearance
terrain clearanceterrain clearance
terrain clearance that
thatthat
that is
isis
is greater
greatergreater
greater than
thanthan
than the
thethe
the actual
actualactual
actual terrain
terrainterrain
terrain
clearance.
clearance.clearance.
clearance.
Extreme caution must be taken during any cold
Extreme caution must be taken during any coldExtreme caution must be taken during any cold
Extreme caution must be taken during any cold
temperature flight operations to ensure that the aircraft is
temperature flight operations to ensure that the aircraft istemperature flight operations to ensure that the aircraft is
temperature flight operations to ensure that the aircraft is
operated with adequate separation from terrain.
operated with adequate separation from terrain.operated with adequate separation from terrain.
operated with adequate separation from terrain.
The pilot is solely
The pilot is solelyThe pilot is solely
The pilot is solely responsible to ensure that adequate
responsible to ensure that adequateresponsible to ensure that adequate
responsible to ensure that adequate
terrain clearance is maintained and can not rely on the
terrain clearance is maintained and can not rely on theterrain clearance is maintained and can not rely on the
terrain clearance is maintained and can not rely on the
AT300 for this purpose.
AT300 for this purpose.AT300 for this purpose.
AT300 for this purpose.
3.6
3.63.6
3.6 Vertical Speed Display
Vertical Speed DisplayVertical Speed Display
Vertical Speed Display
The AT300 presents vertical speed indications to the pilot using both a digital VSI rate
indicator and an analog VSI tape indicator. The vertical speed indications are active for
all vertical rates between -9900 fpm to +9900 fpm. For vertical rates in excess of
10,000 fpm, the digital value is dashed and the analog tape will show full scale
deflection.

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Figure
FigureFigure
Figure 5
55
5 -
--
- Vertical Speed Display
Vertical Speed DisplayVertical Speed Display
Vertical Speed Display
The vertical speed tape on the VSI gives analog indications of vertical rates between
+/- 2000 fpm. Above these values, the tape saturates at a full scale 2000 fpm value,
and the digital value should be referenced to determine the aircraft vertical rate.
The scale tick marks on the vertical speed tape are only depicted whenever the vertical
speed is greater than 50 fpm, and then only in the direction of motion of the aircraft.
Below 50 fpm, only the zero fpm major tick mark is shown. This implementation
provides a clear and unambiguous indication of magnitude and direction vertical rate,
even for very shallow climbs or descents.
A digital VSI value is also provide by the AT300, presented in a dedicated display field
located near the bottom and immediately adjacent to the VSI tape. This indicator
shows the aircraft vertical rate to the nearest 100 fpm, using two digits. One digit is
used to represents hundreds of feet per minute, and a second digit is used to
represent thousands of feet per minute. The hundreds digits is a single superscript
digit, while the thousands digit is a single full size digit. Thus, 500 fpm would be
shown as a superscript digit “ 5” while 9900 fpm would be shown as “99”.
Also presented in the digital VSI field is a digital +/- direction indication. This +/-
indicator comes “alive” whenever the aircraft vertical rate exceeds 30 fpm.
3.7
3.73.7
3.7 Rising Terrain Bar
Rising Terrain BarRising Terrain Bar
Rising Terrain Bar
The rising terrain bar is a tan colored indicator that rises into the vertical speed tape
bar as shown in the following diagram:
ZERO POINT
MA
J
OR TICS
VSI TAPE
RISING TERRAIN
BAR
DIGITAL VSI
RATE
MINOR TICS
+2000
+2000+2000
+2000
+
++
+10
1010
1000
0000
00
+
++
+5
55
500
0000
00
0
00
0
-
--
-500
500500
500
-
--
-1
11
1000
000000
000
-
--
-2000
20002000
2000

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Figure
FigureFigure
Figure 6
66
6 -
--
- Rising Terrain Bar
Rising Terrain BarRising Terrain Bar
Rising Terrain Bar
As the aircraft gets closer to the ground the rising terrain bar will come into view. The
bar first comes into view when the aircraft height above ground reaches 2000 feet
AGL. The bar continues to rise toward zero as the aircraft gets closer to the ground.
When the aircraft is on the ground, the bar completely fills the lower half of the VSI
scale area. (The VSI “1” mark corresponds to 1000 feet and the “.5” mark corresponds
to 500 feet AGL). During a departure, the ground bar will “shrink” as the height above
ground increases. This indicator corresponds to the terrain cell height directly below
the aircraft and is not forward looking in nature.
3.8
3.83.8
3.8 Height Above Ground
Height Above GroundHeight Above Ground
Height Above Ground Digital
DigitalDigital
Digital Indication
IndicationIndication
Indication
Whenever the aircraft’s calculated altitude is below 20,000 ft AGL, the AT300 presents
the pilot will a digital indication of the aircraft height above ground. This digital AGL
value is presented in a dedicated text field in the lower right hand corner of the AT300
display area. This indicator shows the aircraft height above ground to the nearest 100
fpm, using two digits. One digit is used to represents hundreds of feet AGL and the
second and third digits are used to represent thousands of feet AGL. The hundreds
digits is a single superscript digit, while the thousands digits are full size digit. Thus
500 feet AGL would be shown as a superscript digit “005” while 19900 feet AGL would
be shown as “199”.
Figure
FigureFigure
Figure 7
77
7 -
--
- Height Above Ground
Height Above GroundHeight Above Ground
Height Above Ground
3.9
3.93.9
3.9 GPS Course Line
GPS Course LineGPS Course Line
GPS Course Line
Whenever the connected aviation GPS has an active navigation leg, the AT300 will
display the current and next (if available) waypoint information in the map area. The
active navigation leg is shown as a magenta line, with waypoint symbols at each end.
The waypoint identifier for the active waypoint is shown to the right of the waypoint
icon. The next navigation leg information (when available) is shown by a white line
Rising Terrain Bar
Rising Terrain BarRising Terrain Bar
Rising Terrain Bar

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with a waypoint icon at each end. The waypoint identifier of the next waypoint is also
shown.
Figure
FigureFigure
Figure 8
88
8 -
--
- GPS Course Line
GPS Course LineGPS Course Line
GPS Course Line
Note: This feature is not supported in ArNav GPS systems
3.10
3.103.10
3.10 Airport Locations
Airport LocationsAirport Locations
Airport Locations
Airport locations are indicated with a round white and blue airport icon symbols shown
below. Airports icons automatically de-clutter from the screen on range settings of
60nm and above. The airport icon runway symbols do not reflect the runway
orientation at the depicted airport.
Figure
FigureFigure
Figure 9
99
9 -
--
- Airport Icon
Airport IconAirport Icon
Airport Icon
3.11
3.113.11
3.11 Obstructions
ObstructionsObstructions
Obstructions
The AT300 obstruction data base includes all man made towers in the coverage area
with an elevation of 250’ above ground level or higher. The obstructions are depicted
using a color coded triangle icon depicted below.
Figure
FigureFigure
Figure 10
1010
10 -
--
- Obstruction
ObstructionObstruction
Obstruction Icon
IconIcon
Icon
WAYPOINT
ICON
NEXT LEG
(WHITE)
CURRENT LEG
(MAGENTA)
NEXT
WAYPOINT
(NOT SHOWN)
WAYPOINT ID
WHITE
BLUE

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Obstructions color coding is as follows:
Greater than 2500
Greater than 2500Greater than 2500
Greater than 2500 below:
below:below:
below: Black (No Terrain Shown)
Black (No Terrain Shown)Black (No Terrain Shown)
Black (No Terrain Shown)
2500 to 1500 feet below:
2500 to 1500 feet below:2500 to 1500 feet below:
2500 to 1500 feet below: Light Green
Light GreenLight Green
Light Green
1500 to 500 feet below:
1500 to 500 feet below:1500 to 500 feet below:
1500 to 500 feet below: Dark Green
Dark GreenDark Green
Dark Green
500 feet
500 feet500 feet
500 feet below
belowbelow
below to
toto
to same as aircraft altitude
same as aircraft altitudesame as aircraft altitude
same as aircraft altitude:
::
: Yellow
YellowYellow
Yellow
Above aircraft altitude
Above aircraft altitudeAbove aircraft altitude
Above aircraft altitude Red
RedRed
Red
3.12
3.123.12
3.12 System Status Messages
System Status MessagesSystem Status Messages
System Status Messages
The following system status messages may be annunciated by the AT300 in a text
block in the middle of the moving map display area
Message/Indication
Message/IndicationMessage/Indication
Message/Indication Meaning
MeaningMeaning
Meaning
“
““
“NO GPS
NO GPSNO GPS
NO GPS”
””
” GPS data is unavailable or flagged invalid by
the GPS receiver
“
““
“NO COVERAGE
NO COVERAGENO COVERAGE
NO COVERAGE”
””
” Current position falls outside the terrain
coverage area of the terrain database
“
““
“LOW VOLTS
LOW VOLTSLOW VOLTS
LOW VOLTS”
””
” Aircraft bus voltage is too low for reliable
operation. Remainder of screen will be
blanked during this mode.
“
““
“LANDING
LANDINGLANDING
LANDING”
””
” The AT300 has determined that the aircraft is
most likely in the landing phase of flight
based upon distance to the nearest airport,
direction of flight, altitude, and altitude rate.
“
““
“ON GROUND
ON GROUNDON GROUND
ON GROUND”
””
” The AT300 has determined that the unit is
most likely on the ground, based upon current
groundspeed.
“
““
“DEPARTURE
DEPARTUREDEPARTURE
DEPARTURE”
””
” The AT300 has determined that the aircraft is
most likely in the post take-off departure
phase of flight or in the missed approach
phase of flight, based upon distance from the
nearest airport, direction of flight, altitude,
and altitude rate.

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3.13
3.133.13
3.13 Database Updating
Database UpdatingDatabase Updating
Database Updating
Terrain, airports and obstructions are updated by removing the database label and
associated data card located on the side of the unit. Procedures supplied with updated
databases should be referenced for detailed instructions on this procedure. Aspen
releases updated database images approximately every six months.
Databases are identified with cycles from 00 to 99. There are three databases, terrain,
airports and obstructions. The nomenclature utilized on the data card label, located
on the side of the unit is XX.YY.ZZ.
Contact the factory for additional information on the current database cycle available.

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4
44
4Installation
InstallationInstallation
Installation
4.1
4.14.1
4.1 Equipment Description
Equipment DescriptionEquipment Description
Equipment Description
The AT300 is a panel mounted electronic display instrument designed to replace the
industry standard Vertical Speed Indicator (VSI) located in most general aviation
aircraft. The AT300 incorporates a high-resolution, sunlight readable, color active-
matrix liquid crystal display (TFT LCD) with an anti-reflective coating protective glass
face.
NOTE
NOTENOTE
NOTE
The AT300 protective glass face is coated with a
The AT300 protective glass face is coated with aThe AT300 protective glass face is coated with a
The AT300 protective glass face is coated with a special
specialspecial
special
anti
antianti
anti-
--
-reflective
reflectivereflective
reflective coating that is sensitive to cleaners, waxes,
coating that is sensitive to cleaners, waxes,coating that is sensitive to cleaners, waxes,
coating that is sensitive to cleaners, waxes,
skin oils, etc. Special care
skin oils, etc. Special careskin oils, etc. Special care
skin oils, etc. Special care is required when cleaning this
is required when cleaning thisis required when cleaning this
is required when cleaning this
glass surface.
glass surface.glass surface.
glass surface.
DO NOT USE ABRASIVE OR HARSH CHEMICAL CLEANERS,
DO NOT USE ABRASIVE OR HARSH CHEMICAL CLEANERS,DO NOT USE ABRASIVE OR HARSH CHEMICAL CLEANERS,
DO NOT USE ABRASIVE OR HARSH CHEMICAL CLEANERS,
SUCH AS THOSE CONTAINING AMMONIA, TO CLEAN THE
SUCH AS THOSE CONTAINING AMMONIA, TO CLEAN THESUCH AS THOSE CONTAINING AMMONIA, TO CLEAN THE
SUCH AS THOSE CONTAINING AMMONIA, TO CLEAN THE
AT300 GLASS F
AT300 GLASS FAT300 GLASS F
AT300 GLASS FACE.
ACE.ACE.
ACE.
I
II
It is recommended that the AT300 glass face be cleaned
t is recommended that the AT300 glass face be cleanedt is recommended that the AT300 glass face be cleaned
t is recommended that the AT300 glass face be cleaned
using a clean, lint free cloth with
using a clean, lint free cloth withusing a clean, lint free cloth with
using a clean, lint free cloth with eyeglass lens cleaner
eyeglass lens cleanereyeglass lens cleaner
eyeglass lens cleaner
suitable for use on anti
suitable for use on antisuitable for use on anti
suitable for use on anti-
--
-reflective coatings.
reflective coatings.reflective coatings.
reflective coatings.
In addition to presenting vertical speed information, the AT300 provides a real time
moving map depicting terrain information, color coded based on its relative altitude to
the current aircraft altitude. Navigation information from the connected GPS system
can also be presented in the AT300 moving map area. In addition to an RS232 serial
input from a panel mount GPS system, the AT300 requires a single power input from
the aircraft power system, and an associated ground connection
4.2
4.24.2
4.2 Installation Preparation
Installation PreparationInstallation Preparation
Installation Preparation
As with all avionics products, proper planning and preparation is critical to
experiencing a smooth and trouble free installation. It is important to review all of the
information within this manual, including the product overview provided in section 1.2,
to be sure that all of the pre-installation requirements have been fulfilled.