DOC7010R01
7 July, 2014
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XP Transponders User Guide Rev 1.3
Contents
Introduction 3
Transponder Certification 3
Equipment Safety 4
XP Transponder Fundamentals 4
Specifications 5
Serial Communication 6
ADS-B, GPS and Extended Squitter Functionality 6
Mutual Suppression Functionality 7
Transponder Installation 8
Transponder Mounting 8
Power 8
Thermal Management 9
Control Interface 9
GPS Interface 10
Antenna 10
GPS Antenna 12
Antenna Cable 12
Static Pressure 13
Appendix A: Contact Sagetech 14
Appendix B: Glossary 15
Appendix C: Electrical Connections 16
Transponder Interface Cable / Connectors 16
Transponder Main Connector Pin-out 16
Main Connector - Important Notes Error! Bookmark not defined.
Main Connector - Important Notes 18
Appendix D: Revision History 21
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XP Transponders User Guide Rev 1.3
Part Number
Product Name
XPC-TR
Mode C Transponder
XPS-TR
Mode S Transponder with ADS-B Out
XPG-TR
Mode S Transponder with ADS-B Out and
Integrated GPS
XPS-TRB
Mode S Transponder with ADS-B In/Out
Introduction
Sagetech Corporation is dedicated to making integration of our XP family of transponders a straightforward and simple exercise.
We want your experience with Sagetech to be unparalleled in product quality and customer service. If
you have questions, you can email or call us at:
support@sagetechcorp.com
1 (509) 493-2185
We also are interested in your feedback (good or bad) on our products, documents, and customer
service.
This document provides basic information necessary for a user to install and use the Sagetech XP family
of transponders.
Sagetech XP Family of Transponders by Part Number
Unless otherwise specified, the information in this document applies to all Sagetech XP transponders.
Transponder Certification
The XP family of transponders is not currently TSO certified, although certification work by Sagetech is
underway. For information about the TSO certification timeline, contact Sagetech Corporation.
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XP Transponders User Guide Rev 1.3
Equipment Safety
This product, like all microcontroller products, uses semiconductors that can be
damaged by electrostatic discharge (ESD). When handling, use standard ESD
practices to ensure the transponder is not damaged.
Important:
Whenever power is supplied to the transponder, a 50 ohm load must be provided
to the SMA connection. You can use an antenna or a commercially available 50
ohm load (for example, part number TS180M-10W available from RFMW.com).
XP Transponder Fundamentals
The Sagetech XPC-TR Mode C Transponder interacts with air traffic control (ATC) by transmitting and
receiving standard secondary surveillance radar pulses per ICAO requirements. The transponder replies
to requests from ATC with a squawk code and altitude data. Altitude data can be based on the
taspode’s integral, calibrated pressure sensor and encoder (termed a blind encoder) or one provided
external to the transponder.
The Sagetech XPS-TR Mode S Transponder with ADS-B Out contains all the functionality of the Sagetech
XPC-TR Mode C Transponder. In addition, it provides Mode S replies (includes data such as ICAO1
address and call sign) and is capable of being selectively interrogated. Also, it adds Automatic
Dependent Surveillance-Broadcast (ADS-B) Out capability. If configured with a GPS data source it can
broadcast aircraft position and other relevant data to the ATC system and surrounding aircraft.
The Sagetech XPG-TR Mode S Transponder with ADS-B Out contains all the functionality of the Sagetech
XPS-TR Mode S Transponder except Mutual Suppression. In addition, the transponder is preconfigured
to use the installed GPS module with an internal GPS Antenna. A connector is provided to enable use of
an optional external antenna as a GPS receiving source.
The Sagetech XPS-TRB Mode S Transponder with ADS-B In/Out contains all the functionality of the
Sagetech XPS-TR Mode S Transponder with ADS-B Out. In addition, it receives ADS-B traffic information
from the ATC system and surrounding aircraft and reports this data to the flight computer, which can
then communicate it to the user. Transponders with ADS-B In are useful for sense and avoid applications
as ADS-B In provides the user with surrounding traffic information within a nominal range of 120
nautical miles (NM).
A 24-bit address used to identify aircraft.
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XP Transponders User Guide Rev 1.3
XPC-TR
XPS-TR
XPG-TR
XPS-TRB
Serial Communications / General
Operating Altitude
unrestricted
unrestricted
Unrestricted
unrestricted
Transmit Power
250 W nominal
250 W nominal
250 W nominal
250 W nominal
1030 Receive Sensitivity
-73 +/- 4 dBm
-73 +/- 4 dBm
-73 +/- 4dBm
-73 +/- 4 dBm
1090 ADS-B IN Sensitivity
N/A
N/A
N/A
-84 dBm
RF Impedance
Ω
Ω
Ω
Ω
Serial Com0 Control
Proprietary
protocol
RS-232, 57.6 Kb
Proprietary
protocol
RS-232, 57.6 Kb
Proprietary
protocol
RS-232, 57.6 Kb
Proprietary
protocol
RS-232, 57.6 Kb
Serial Com2 GPS Input
N/A
Accord NexNav,
NMEA RS-232, Adj
data rate
N/A
Accord NexNav,
NMEA RS-232,
Adj data rate
Serial Com1 ADS-B In Messages
N/A
N/A
N/A
Proprietary
protocol RS-232,
Adj data rate
Mutual Suppression
Yes
Yes
No
Yes
Altitude Encoder
20,000 – 60,000 ft
20,000 – 60,000 ft
20,000 – 60,000 ft
20,000 – 60,000 ft
ADS-B Out (Extended Squitter)
No
Yes
Yes
Yes
ADS-B In (TIS-B)
No
No
No
Yes
Export Compliance
ECCN 7A994
ECCN 7A994
ECCN 7A994
ECCN 7A994
Power
Supply Voltage
10-32 V
10-32 V
10-32 V
10-32 V
Power Consumption (ON & ALT)
4 watts (typical) 11
watts (max)
7 watts (typical) 12
watts (max)
8 watts (typical) 14
watts (max)
Power Consumption (STBY)
< 1 watt
< 1 watt
< 1 watt
< 1 watt
Certification Plan – TSO and Certification Efforts On-Going
Minimum Operational
RTCA DO-181E,
RTCA DO-260B
RTCA DO-181E,
RTCA DO-260B
Performance Standards
SAE AS8003
SAE AS8003
FAA
TSO-C112e Level
2els, Class 1, TSOC166b Class B0,
TSO-C88b
TSO-C112e Level
2els, Class 1,
TSO-C166b Class
A0, TSO-C88b
EASA
ETSO-2C112b,
ETSO-C166a,
ETSO-C88a
ETSO-2C112b,
ETSO-C166a,
ETSO-C88a
FCC
FCC part 87, Part 15
FCC part 87, Part 15
Software
DO-178B level C
DO-178B level C
Complex Hardware
DO-254 level C
DO-254 level C
Environmental Testing
DO-160G
DO-160G
Physical/ Environmental
Specifications
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XP Transponders User Guide Rev 1.3
XPC-TR
XPS-TR
XPG-TR
XPS-TRB
Dimensions
89 x 46 x 18 mm
(3.5 x 1.8 x 0.7 in)
89 x 46 x 18 mm
(3.5 x 1.8 x 0.7 in)
97 x 46 x 25 mm
(3.8 x 1.8 x 1.0 in)
89 x 46 x 18 mm
(3.5 x 1.8 x 0.7 in)
Mass
98 g (3.45 oz)
98 g (3.45 oz)
147 g (5.2 oz)
100 g (3.53 oz)
Operating Temperature
-20 to 70 °C (-4 to
158 °F)
-20 to 70 °C (-4 to
158 °F)
-20 to 55°C (-4 to
131 °F)
-20 to 70 °C (-4 to
158 °F)
Storage Temperature
-55 to 85 °C (-67 to
185 °F)
-55 to 85 °C (-67 to
185 °F)
-20 to 85 °C (-4 to
185°F)
-55 to 85 °C (-67 to
185 °F)
Humidity
Max: 95% noncondensing
Max: 95% noncondensing
Max: 95% noncondensing
Max: 95% noncondensing
Serial Communication
Sagetech XP transponders are controlled through a straightforward communication system via a serial
interface (RS-232). Many flight computers support the proprietary Sagetech XP Transponder protocol
allowing plug-and-play integration with the Sagetech XP family of transponders. If you have a
proprietary flight computer, data link, or other method of controlling the transponder, please contact
Sagetech for the Sagetech XP Serial Communication Document.
ESD protection (at 2kV HBM or better) is provided on the main RS-232 interface pins
ADS-B, GPS and Extended Squitter Functionality
ADS-B is a itial opoet of the FAA’s NetGe iitiatie to epad aispae apait ad ake it
more efficient while maintaining or improving safety. By augmenting or – in some cases – replacing
expensive ground-based surveillance radars, ADS-B promises to reduce air traffic control costs while
concurrently enhancing controller and pilot situational awareness.
ADS-B equipment is built to meet one of two sets of US government standards, DO-260B or DO-282B. By
the year 2020 all aircraft operating in the airspaces listed below will be required to carry equipment that
broadcasts ADS-B surveillance data. The ADS-B Out variants of the XPS transponders, once TSO
Authorized, are intended to meet all requirements defined for NextGen transponders.
XP transponders with ADS-B Out support a message type known as the extended squitter (ES). The ES is
a periodic message transmitted automatically, without the transponder first being interrogated. This
message typically provides identification, position, velocity, status, and other aircraft data.
GPS data is provided to the transmitter from the avionics system integrator in one of two ways:
a) GPS serial data stream on XP serial interface Com2. The data format is either NMEA or a
proprietary format from a NexNav Mini GPS (a TSO-C145c compliant solution).
Note: The XPG-TR streams GPS data from Com2 using the internal GPS module and
antenna. It may be configured to use an alternate source on Com0.
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XP Transponders User Guide Rev 1.3
b) GPS data is incorporated into the command and control protocol packets on XP serial interface
Com0. For more information, see the Sagetech XP Transponder Serial Communication
Document.
Note: Sagetech recommends using the external Accord Technology NexNav Mini
receiver. It is the smallest TSO-C145c Class Beta-1 receiver we have identified.
Note: Do not implement both external GPS data to Com2 and flight computer GPS
data to Com0 at the same time. The GPS Source byte of the Installation Message
controls which interface is used. For more information, see the Sagetech XP
Transponder Serial Communication Document.
If no GPS source is connected to the transponder or if the GPS data is determined to be unreliable, the
ES messages are still transmitted, but without GPS-based position data.
Mutual Suppression Functionality
The Sagetech transponders include a mutual suppression line designed to coordinate transmission of
potetiall oflitig sigals. Whe the XP taspode’s Mutual “uppessio lie is pulled do it
stops transmitting until the mutual suppression line re-opens. The transponder starts transmitting again
within 15 microseconds of the end of the mutual suppression pull-down condition. Sagetech
recommends use of an open collector transistor circuit able to sink 1 mA to drive this interface. Interface
must be able to pull this line below 400 mV to ensure transponder is fully suppressed. When not
suppressed the transponder weakly pulls up the Mutual Suppress line to the input supply voltage (with
range between 10 to 32 V). No pull-up resistor is required on customer hardware.
Leave the Mutual Suppression pin unconnected if not used.
XPG-TR does not have Mutual Suppression functionality.
Electrical connections to the transponder, including the Mutual Suppression signal, are defined in detail
in Appendix C of this document.
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XP Transponders User Guide Rev 1.3
Quantity
Required
Description
Vendor
Vendor PN
4
1 1/4" Pan Head 4-40 Machine Screw
McMaster-Carr
90279A117
8
Washers
McMaster-Carr
98029A024
4
Lock Nuts
McMaster-Carr
90631A005
Transponder Installation
Installation of Sagetech XP Transponders consists of:
Mounting the transponder in your airframe.
Routing power cables to the transponder (but not yet powering it up).
Coetig the taspode ale’s fee ed teiatios to ou control interface.
Connecting to a GPS data source if it is an ADS-B Out variant.
Installing an antenna.
Routing and connecting the antenna cable.
Connecting the altitude sensor/encoder to system Static Pressure.
Transponder Mounting
The mounting holes in the transponder accept 4-40 (or M3 x .05) machine screws. Most transponders
are 0.7 inches thick (18mm) at the mounting points; the XPG-TR with its GPS assembly is 1.0 inch thick
(25mm). The required minimum machine screw length depends on specific installation variables,
including the thickness of your mounting hardware, any washers, and the nut. When determining a
proper machine screw length, ensure excess machine screw length does not interfere with other
components.
The machine screws listed in Table 1 represent an approximate starting point in a search for the correct
screw for your custom installation.
Table 1 – Common Machine Screws
Sagetech recommends applying Loctite 242 Threadlocker to the machine screw threads, or using lock
washers or nuts.
Power
The transponder can be powered with 10-32 volts DC (at the transponder). Transponder power
consumption is documented Table 2. If you are supplying voltage to the transponder at the lower end of
that range, avoid voltage loss by using short power supply wires and/or larger diameter power supply
wires.
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XP Transponders User Guide Rev 1.3
Variant
Supply Voltage
Max Average
Current
Note
XPC-TR Mode C Transponder
10 V
1.1 A
Measured
32 V
0.4 A
Measured
XPS-TR Mode S Transponder with ADS-B Out
10 V
1.2 A
Measured
32 V
0.4 A
Measured
XPS-TRB Mode S Transponder with ADS-B In/ Out
10 V
1.4 A
Estimated
32 V
0.5 A
Estimated
Zener diodes are used on the DC Power pins to protect the transponder against overvoltage and reverse
polarity.
Electrical connections to the transponder, including DC power, are defined in detail in Appendix C of this
document.
Sagetech recommends use of an appropriate amperage inline fuse for the supplied current.
Table 2 – Maximum Current Consumption
Important:
Transponder inrush current when the transponder is switched from OFF/STBY to
ALT/ON is as follows (all variants): 6A at 32v and 4A at 10v. Contact Sagetech if you
need actual graphical data depicting inrush current for your particular application.
Thermal Management
The XP transponder is designed so its case conducts thermal load to the aircraft frame. The transponder
can be firmly mounted directly to the aircraft, or to other components within the aircraft.
The transponder should be mounted away from sources of excess heat to better guarantee an operating
environment within its designed temperature range.
Control Interface
Sagetech XP transponders are controlled with a straightforward communication system via a serial
interface (RS-232 port).
Sagetech provides a Transponder Interface Cable (part number XP-CBL-001) which includes a
transponder-side connector and is un-terminated at the flight control side. Electrical connections to the
transponder, including serial interfaces, are defined in detail in Appendix C of this document.
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XP Transponders User Guide Rev 1.3
Sagetech XP transponders are plug-and-play compatible with many standard flight computers to simplify
operation and use. Currently MicroPilot, UAV Navigation, and Cloud Cap are working on updates.
Control of the transponder will be supported by each flight computer vendor’s documentation.
If you have a proprietary flight computer, data link, or other method of controlling the transponder,
please contact Sagetech for the Sagetech XP Serial Communication Document.
In installations where the transponder does not interface with a flight computer, a data link or other
method can control the transponder using the serial port.
Note: When you connect the transponder interface cable to the transponder, tighten
the screws sufficiently so the connector does not loosen due to aircraft vibration.
GPS Interface
For XPS transponders with ADS-B Out, GPS data must be provided to the transponder from the aircraft
system integrator in one of two ways:
a) GPS serial data streams on XP serial interface Com2. The data format is either NMEA GPRMC
format or the NexNav Mini GPS (http://www.accord-technology.com/nexnav_mini.html ). Com2
is an RS-232 port defined in detail in Appendix C of this document. Using the external interface
also allows a faster GPS data rate and therefore slightly increased accuracy.
The XPG-TR variant of the Mode S transponder is preconfigured to automatically stream GPS
data from its internal GPS module, with signal coming from either its internal or an external
antenna.
b) GPS data incorporated into the command and control protocol packets on XP serial interface
Com0. For more information on the serial command protocol, see the Sagetech XP Transponder
Serial Communication Document.
Note: Sagetech recommends using the external Accord Technology NexNav Mini
receiver. It is the smallest TSO-C145c compliant receiver we have identified.
Note: Do not implement both external GPS data to Com2 and flight computer GPS
data to Com0 at the same time. The GPS Source byte of the Installation Message
controls which interface is used. For more information, see the Sagetech XP
Transponder Serial Communication Document.
Antenna
The transponder should have its own antenna. An exception to this rule is use of a high quality diplexer
that enables antenna sharing between a transponder and certain ADS-B equipment. Further guidance
on diplexer use can be found in RTCA documents DO-282B and DO-260B, the minimum operational
performance standards for UAT and 1090 MHz ADS-B, respectively.
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Antenna Requirements
Frequency
1030 to 1090 MHz
Polarization
Vertical
Nominal Impedance
Ω
VSWR
<1.5 between 1030 to 1090 MHz
Radiation Pattern
The gain must not be less than the gain of a matched quarterwave stub minus 3 dB over 90 percent of a coverage volume
from 0 to 360 degrees in azimuth and from 5 to 30 degrees
above the ground plane when installed at the center of 1.2 m
(4 foot) diameter (or larger) flat circular ground plane.
Mounting Location
Underside of aircraft fuselage, nominally at the wing root
Thumbnail
Type
Vendor
Vendor PN
Weight
Connector
Monopole Antenna
Aircraft Spruce and Specialty
11-17995
30 g
BNC Female
Blade Antenna
Aircraft Spruce and Specialty
AV-74
100 g
BNC Female
Use an antenna designed to be used with aviation transponders with the characteristics documented in
Table 3.
Table 3 – Transponder Antenna Requirements
Note: If your installation does not meet all of the above requirements, transponder
performance (range) may be hindered and damage to the transponder could result.
Important:
Whenever power is supplied to the transponder, a 50 ohm load should be provided
to the SMA connection. Ensure that the antenna selected provides a 50 ohm
termination for the transponder.
Table 4 – Examples of Transponder Antennas
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Antenna Requirements
Frequency
1575.42 MHz
Polarization
RHCP
Nominal Impedance
Ω
VSWR
≤ 2
Voltage
2.8 V at 50mA max
Gain
25-33 dB
Mounting Location
Topside of aircraft fuselage, with clear view of sky.
The antenna should be outed o the outside of the aiaft aodig to the aufatue’s
installation instructions. The ideal location is a vertical orientation, mounted on the underside of the
aircraft, near the wing root.
Try to minimize the distance between the transponder and the antenna. Take care to locate the antenna
away from any objects that may disrupt the ground plane for the antenna, such as doors and landing
gea. Do ot plae the atea lose to egie ehaust. T to keep the atea loated at least
away from other antennas on the aircraft. The antenna should be located as close to the centerline of
the fuselage as space allows, while trying to keep the antenna on a flat surface.
A ground plane is required for most transponder antennas (including examples listed above). Failure to
provide a good ground plane can result in degradation of antenna performance.
Also, take care not to over-torque the antenna in an attempt to reduce a gap between the antenna and
the mounting surface; torque the antenna to the manufacture’s instructions.
GPS Antenna
The XPG-TR uses an active GPS, and if an external antenna is required it should meet with the following
requirements.
Table 5: GPS Antenna Specifications
Sagetech offers an external GPS antenna GPS-ANT-001 (GPS active antenna module with cable) that
meets these requirements, as well as XP-AT-002 (GPS active antenna module, bulkhead) and XP-CBL005, a cable to connect the antenna to the XPG-TR unit.
Antenna Cable
A suitable antenna cable consists of a male SMA connector, a length of co-axial cable, and a suitable
connector for your antenna. For example, if you are using a simple monopole antenna (as shown in
Table 4) with a BNC female connector, your antenna cable will need a BNC male connector.
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XP Transponders User Guide Rev 1.3
The antenna cable should have no more than 2dB of signal loss from the transponder to the antenna.
This includes losses in the connectors and cable. Generic and custom built cables can be obtained from
suppliers such as Pasternak, Richardson, and Aircraft Spruce.
Avoid sharp bends in the antenna cable that could lead to additional signal loss.
Static Pressure
The tasdue plus ito the aiaft’s stati pessue soue. This can be accomplished by plumbing
the altitude encoder connection to a static pressure line that shares the same source as the main aircraft
altiete. The XP taspode seso aepts tuig ith a iside diaete of o /. Typically,
the tubing will need to be secured to the pressure transducer with a cable tie, clip or other suitable
method. However, in installations where the tubing is held in place by compression and is unlikely to
come lose (for example, a short, straight run of tubing between the transponder and a fitting held in a
fixed location), a mechanical fastener such as a cable tie may not be necessary.
If your installation requires cables ties, consider using something similar to Mouser part number 644PLT.6SM-M0.
In general, try to minimize the tubing length between the transducer and the static pressure system.
Your static pressure system may use 1.8mm, ., , /, /, /" or other sized fittings.
Many aircraft installations use standard silicon tubing; e.g., Du-Bro part number 197m size medium,
available from radio control supply houses. Other systems use tubing from Cole Palmer (Tygon R-3603),
Beswick Engineering (part number MUT-1012), or McMaster-Carr (part numbers 5155T14or 5119K41). If
the tubing is stiff and needs to be stretched to fit on the pressure transducer, utilize needle nose pliers
as shown in Figure 1.
Figure 1 – Utilizing Needle Nose Pliers to Stretch Tubing
If you have to step up or step down in tubing size within your static pressure system, you can often slip
one hose inside another and secure this overlap with a clip, cable tie, or other suitable fastener. Some
flight computer vendors make custom step fittings.
A typical installation will have a T or Y fitting in the static pressure line with one end running to the
transponder. Suitable Y-barbed tube fittings are available from suppliers such as McMaster-Carr.
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XP Transponders User Guide Rev 1.3
Phone:
1 (509) 493-2185
General E-Mail:
Info@SagetechCorp.com
Transponder Inquiries:
Transponder@SagetechCorp.com
Web form:
http://sagetechcorp.com/home/contact-us
Phone:
1 (509) 493-2185x500
Support E-Mail:
Support@SagetechCorp.com
Appendix A: Contact Sagetech
General Contact Information
Support Contact Information
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XP Transponders User Guide Rev 1.3
Appendix B: Glossary
ACK: Each time the transponder receives a message, it responds with an acknowledgement message
indicating that the information was received and set correctly. The acknowledgement message also
contains transponder status information. This message is called the Acknowledge Message or ACK for
short.
ADS-B: Automatic Dependent Surveillance-Broadcast (ADS-B) is an emerging system for cooperative air
traffic control. The ADS-B unit broadcasts GPS and other aircraft-related data to the ATC system and
nearby aircraft. Some units only broadcast ADS-B data while others broadcast and receive ADS-B data.
When using a data link frequency of 1090 MHz, often ADS-B functionality is implemented as part of a
transponder.
ATC: The air traffic control system uses ground-based hardware and air traffic controllers to direct
aircraft traffic.
GPRMC: Recommended NMEA 0183 sentence that contains all of the basic GPS requirements for a
transponder. See NMEA 0183 below.
GPS: A space-based global positioning system that provides reliable location and time information. Note
that other systems that provide equivalent data may be used (GLONASS, Galileo, etc). It is not the intent
of this document to limit the user to only GPS.
ICAO address: A 24-bit address used to identify aircraft. ICAO stands for International Civil Aviation
Organization.
Ident: Idet is shot fo idetif. Whe ai taffi otol euests that the aiaft idetif, the pilot
uses the Ident function to send a message to ATC that enhances or exaggerates the blip on the air traffic
otolle’s ada see. The Ident function should only be activated at the request of ATC.
NMEA 0183 message (using GPRMC): The National Marine Electronics Association (NMEA) defines a
messaging protocol called 0183. GPRMC is a specific message type within that protocol.
Non-volatile memory: Data stored in non-volatile memory is not lost when power to the device is
removed or interrupted.
Squawk code: The ATC system for a given geographic area assigns a unique four digit number to each
transponder equipped aircraft in that area. This number is called a squawk code, and it is transmitted by
the transponder only when interrogated by ATC to aid in aircraft identification.
TSO: A Technical Standard Order is a minimum performance and design assurance standard set by the
FAA for specified materials, parts, and appliances used on civil aircraft. When authorized to manufacture
a material, part, or appliance to a TSO standard, this is referred to as TSO Authorization (TSOA).
Receiving a TSOA is both design and production approval. A TSO by itself is not an approval to install and
use the article in an aircraft, though it greatly facilitates obtaining an approval.
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26
1
Appendix C: Electrical Connections
The Sagetech XP transponder has one 26 pin (RS-232) main electrical connector for power and serial
communication. There is one female, center conductor SMA connector, used to connect the
transponder to an antenna via a coax cable. This connection is used to send and receive RF signals via
the antenna.
Transponder Interface Cable / Connectors
Sagetech provides an accessory interface pigtail cable (part number XP-CBL-001) that can be used to
implement the interface from the transponder to the control source. The Interface Cable uses a 26 pin
connector mated to twisted pair shielded 28 gauge wire with 16 conductors.
If you wish to build your own transponder interface cable, the cable type (solder cup) connector is
Honda part number HDR-E26MSG1+ (and the cable backshell is Honda p/n HDR-E26LPH). If the ideal
interface is for you to design a circuit board interface, the PCB SMT mount connector is Honda p/n HDREA26LMYPG1+.
Sagetech provides an accessory GPS antenna cable for the XPG-TR external GPS connector (part number
XP-CBL-005) that can be used for the installation of an external GPS antenna.
If you wish to build your own GPS cable for the XPG-TR, the external GPS antenna connector is a Hirose
MS-151 RF connecter.
Transponder Main Connector Pin-out
The following diagrams show the transponder main connector pin designations. Figure 2 shows the face
of the transponder assembly. Figure 2 shows the four row representation of the Honda harness
connector solder-cup pins.
Table 6 provides the pin assignments for the main connector while Table 7 provides the pin assignments
for the XPG-TR variant.
Figure 2 – Transponder Main Connector Pin locations (looking at face of transponder connector)
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XP Transponders User Guide Rev 1.3
Main Connector - Important Notes
All four power pins must be connected. Zener diodes are used on the DC Power pins to protect the
transponder against overvoltage and reverse polarity.
At least four of the ground pins must be connected. If you must leave one of the five ground pins
unconnected, you may leave #15 or #17 unconnected.
Pins 13, 18, and 19 are used for production programming and must NOT be connected.
Other Not-Connected pins 20 through 26 should not be connected (left floating).
Pin 11, Mutual Suppress, is designed to connect to an aiaft’s idietioal suppessio us. See the
Mutual Suppress paragraph in this document for details. Leave unconnected if not used.
ESD protection (at 2kV HBM or better) is provided on the main RS-232 interface pins
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XP Transponders User Guide Rev 1.3
Table
Main Connector - Important Notes
All four power pins must be connected. Zener diodes are used on the DC Power pins to protect the
transponder against overvoltage and reverse polarity.
At least four of the ground pins must be connected. If you must leave one of the five ground pins
unconnected, you may leave #15 or #17 unconnected.
Pins 13, 18, and 19 are used for production programming and must NOT be connected.
Other Not-Connected pins 20 through 26 should not be connected (left floating).
Pin 11, Mutual Suppress, is designed to connect to an aiaft’s idietioal suppessio us. See the
Mutual Suppress paragraph in this document for details. Leave unconnected if not used.
ESD protection (at 2kV HBM or better) is provided on the main RS-232 interface pins
19
XP Transponders User Guide Rev 1.3
Pin
Number
Signal
Direction
Signal Char.
Wire Color in Sagetech
Harness p/n XP-CBL-001
(Solid/Band)
Required
1
DC Power
Power
10-32 VDC
White/Tan
Y 2 DC Power
Power
10-32 VDC
White/Brown
Y 3 GND
Power
Gnd
Tan/White
Y 4 GND
Power
Gnd
Brown/White
Y 5 DC Power
Power
10-32 VDC
White/Pink
Y
6
DC Power
Power
10-32 VDC
White/Orange
Y
7
GND
Power
Gnd
Pink/White
Y
8
Com1 RX ADS-B In Data
Input
RS232 Rcv
Orange/White
Optional
9
Com1 TX ADS-B In Data
Output
RS232 Tx
White/Yellow
Optional
10
Com0 TX Command & Control
Output
RS232 Tx
White/Green
Y
11
Mutual Suppression
I/O
I/O
Yellow/White
Optional
12
Com0 RX Command & Control
Input
RS232 Rcv
Green/White
Y
13
NO CONNECT
-
- Y – DO NOT CONNECT
14
Com2 RX GPS Interface
Input
RS232 Rcv
White/Blue
Optional
15
GND
Power
Gnd
White/Violet
Y
16
Com2 TX GPS Interface
Output
RS232 Tx
Blue/White
Optional
17
GND
Power
Gnd
Violet/White
Y
18
NO CONNECT
-
- Y – DO NOT CONNECT
19
NO CONNECT
- -
Y – DO NOT CONNECT
20
Not Connected
-
- -
21
Not Connected
-
- -
21
Not Connected
-
- -
23
Not Connected
-
- -
24
Not Connected
- - - 25
Not Connected
-
- -
26
Not Connected
-
- -
Table 6 – Transponder Main Connector Pin Assignments
20
XP Transponders User Guide Rev 1.3
Pin
Number
Signal
Direction
Signal Char.
Wire Color in Sagetech
Harness p/n XP-CBL-001
(Solid/Band)
Required
1
DC Power
Power
10-32 VDC
White/Tan
Y 2 DC Power
Power
10-32 VDC
White/Brown
Y 3 GND
Power
Gnd
Tan/White
Y 4 GND
Power
Gnd
Brown/White
Y 5 DC Power
Power
10-32 VDC
White/Pink
Y
6
DC Power
Power
10-32 VDC
White/Orange
Y
7
GND
Power
Gnd
Pink/White
Y
8
Com1 RX ADS-B In Data
Input
RS232 Rcv
Orange/White
Optional
9
Com1 TX ADS-B In Data
Output
RS232 Tx
White/Yellow
Optional
10
Com0 TX Command & Control
Output
RS232 Tx
White/Green
Y
11
Not Connected
-
- -
12
Com0 RX Command & Control
Input
RS232 Rcv
Green/White
Y
13
NO CONNECT
-
- Y – DO NOT CONNECT
14
NO CONNECT
-
- Y – DO NOT CONNECT
15
GND
Power
Gnd
White/Violet
Y
16
NO CONNECT
-
- Y – DO NOT CONNECT
17
GND
Power
Gnd
Violet/White
Y
18
NO CONNECT
-
- Y – DO NOT CONNECT
19
NO CONNECT
- -
Y – DO NOT CONNECT
20
Not Connected
-
- -
21
Not Connected
-
- -
21
Not Connected
-
- -
23
Not Connected
-
- -
24
Not Connected
- - - 25
Not Connected
-
- -
26
Not Connected
-
- -
Table 7 – XPG-TR Main Connector Pin Assignments
21
XP Transponders User Guide Rev 1.3
Date
Version
Revisions
May 6, 2011
1.0
Initial Release
June 30, 2011
1.1
Added MicroPilot Content
April 6, 2012
1.2
Style change, removed MicroPilot section,
document title change, added Mode S content,
updated Packaging Drawing
July 7, 2014
1.3
Added XPG-TR to document.
Appendix D: Revision History
This Table lists the revision history of the XP Family of Transponders User Guide.
Table 8 – Sagetech XP Family of Transponders by Part Number
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