Sandia Aerospace STX 165 Installation Manual
STX 165 / STX 165R
Installation Manual
3700 Osuna Rd NE, Suite 711
Albuquerque, NM 87109
www.sandia.aero
306100-00
This document and the information contained herein is the proprietary data of SANDIA aerospace Corporation.
No part of this document may be transmitted, reproduced, or copied in any form or by any means without the prior
written consent of SANDIA aerospace. Due to SANDIA aerospace’s continued product and quality improvement
programs, information contained in this document is subject to change without prior notice
Copyright 2010 SANDIA aerospace Corporation, All right rights reserved. Printed in USA
Information Subject To Export Control Laws
Record of Revisions
Revision
-1 20120222 DRN 402 L. Harrison
-2 20120308 ECN 3884 L. Harrison
-3 20130311 ECN 3916 L. Harrison
-4 20130926 ECN 4004 L. Harrison
Date Description Approval
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Table of Contents
Record of Revisions ....................................................................................................................................1
Table of Contents .......................................................................................................................................2
List of Illustrations .....................................................................................................................................3
Section 1 General Description ...................................................................................................................4
1.1 Introduction ....................................................................................................................4
1.2 STX 165 / STX 165R Product Description ....................................................................4
1.3 Technical Characteristics ...............................................................................................4
1.3.1 Physical Characteristics .................................................................................................4
1.3.1.1 STX 165 Panel Mount ...................................................................................................4
1.3.1.2 STX165R Remote Mount Unit ......................................................................................4
1.3.2 Electrical Characteristics - STX 165 and STX 165R .....................................................4
1.3.3 Operational Chacteristics ...............................................................................................5
1.3.3.1 STX 165 Panel Mount ...................................................................................................5
1.3.3.2 STX 165R Remote Mount .............................................................................................5
1.3.3.3 ST 78 OAT Probe ...........................................................................................................5
1.3.4 Certi! cation ....................................................................................................................5
Environmental Qualifaction Form - STX 165 .........................................................................................6
Environmental Qualifaction Form - STX 165 R .....................................................................................7
Section 2 Installation Considerations .......................................................................................................8
2.1 General ...........................................................................................................................8
2.2 Mounting Considerations ...............................................................................................8
2.2.1 STX 165 Panel Mount ...................................................................................................8
2.2.1.1 Optional 3” Adapter Plate ..............................................................................................8
2.2.2 STX 165R Remote Mount .............................................................................................8
2.3 Cooling ...........................................................................................................................8
Section 2 Installation Procedures .............................................................................................................9
3.1 General ...........................................................................................................................9
3.2 Equipment Required ......................................................................................................9
3.2.1 STX 165 Panel Mount ...................................................................................................9
3.2.1.1 Supplied .........................................................................................................................9
3.2.1.2 Required but not supplied ..............................................................................................9
3.2.2 STX 165R Remote Mount .............................................................................................9
3.2.2.1 Supplied .........................................................................................................................9
3.2.2.1 Required but not supplied ..............................................................................................9
3.2.2.3 Optional ..........................................................................................................................9
3.3 Electrical ......................................................................................................................10
3.4 Aircraft mounting .........................................................................................................10
3.4.1 STX 165 .......................................................................................................................10
3.5.2 STX 165R ....................................................................................................................11
3.4.2.1 Mounting Tray .............................................................................................................11
3.4.2.2 Hard Mounting without Tray .......................................................................................12
3.5 Static Port Connection .................................................................................................13
3.6 Elecrical Connections ..................................................................................................13
3.6.1 STX 165 Panel Mount ................................................................................................13
3.6.2 STX 165R Remote Mount ...........................................................................................13
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3.6.3 Outside Air Temp Probe ...............................................................................................14
3.6.4 Antenna Connector ......................................................................................................14
3.7 Connector Pin Out ........................................................................................................16
3.7.1 STX 165 Panel Mount .................................................................................................16
3.7.2 STX 165R Remote Mount ...........................................................................................17
3.8 Calibration Procedures -STX 165 Panel Mount ..........................................................18
3.9 Installation Con• gurations - STX 165 Panel Mount ...................................................18
3.9.1 OAT Sensor ..................................................................................................................18
3.9.2 OAT Correction ............................................................................................................19
3.9.3 RS 232 BAUD Rate Selection .....................................................................................19
3.9.4 MAX Relpy Rate .........................................................................................................19
3.9.5 Exit Installer Set Up Mode ..........................................................................................19
3.10 User Set Up Mode ........................................................................................................19
3.10.1 Altitude Unit ................................................................................................................19
3.10.2 Temperature Unit .........................................................................................................20
3.10.3 Icing Alert Temp ..........................................................................................................20
3.10.4 EFT Start ......................................................................................................................20
3.10.5 Auto Mode C Alt ..........................................................................................................20
3.10.6 Min Brightness .............................................................................................................20
3.10.7 Default VFR Code .......................................................................................................21
3.10.8 Exit User Set Up Mode ................................................................................................21
3.11 Continued Airwortiness ...............................................................................................21
3.11.1 STX 165 Panel Mount .................................................................................................21
3.11.2 STX 165R Remote Mount ...........................................................................................20
List of Illustrations
Figure 3-1 Panel Cut Out Dimensions .....................................................................................10
Figure 3-2 STX 165 Top Dimensions ......................................................................................11
Figure 3-3 Remote Mounting Tray Dimensions ......................................................................11
Figure 3-4 Remote Unit Dimensions w/out tray ......................................................................12
Figure 3-5 J2/J3 Connector Wiring ..........................................................................................13
Figure 3-6 J2/J3 Connector Hood Assembly ...........................................................................13
Figure 3-7 STP 78 OAT Probe Dimensions .............................................................................14
Figure 3-8 STP 78 OAT Probe Mounting ................................................................................14
Figure 3-9 Antenna SMA Assembly ........................................................................................15
Figure 3-10 STX 165 Rear View ...............................................................................................15
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Section 1 General Description
1.1 Introduction
This manual describes the installation of the SANDIA aerospace STX 165 and STX 165 Mode C transponders. It is
intended for use by FAA certi! ed repair stations to install the STX 165 and STX 165R transponders and includes both mechanical and electrical installation information. Calibration, system con! guration and checkout procedures are included.
The installer should ensure that all functions are operating according to their intended purpose in their particular installation.
1.2 STX 165 / STX 165R Product Description
The STX 165 is a self contained, panel mounted Mode A/C transponder with a built-in 35K foot altitude encoder. The
built-in encoder supplies altitude data to the STX 165 for altitude reporting (Mode C) and outputs the altitude data on an
RS 232 data bus for interface to other avionics systems that require altitude data. A SANDIA aerospace STP 78 OAT
probe, P/N 305561-91 can be installed as an option. When the STP 78 is installed, the STX 165 will display OAT (Outside Air Temperature), Density Altitude and Icing Alert.
The STX 165R is a Remote Mode A/C transponder that accepts attitude data from altitude encoders, such as the SANDIA
SAE 5-35, in either a Gilham Grey code or RS 232 format.
Both units rely to ATCRABS interrogations with one of 4096 possible ‘squawk’ codes.
1.3 Technical Characteristics
1.3.1 Physical Characteristics
1.3.1.1 STX 165 Panel Mount
1/2 3ATI Panel Cut Out
Behind Panel Dimensions 1.78”H x 3.5”W x 7.34”L (4.52cm x 8.89cm x 18.64cm)
Weight: 1.30 Lbs. (.59 kg)
1.3.1.2 STX 165R Remote Mount Unit
Dimensions: 3.5” H x 1.8”W x 6.9”L (8.89cm x 4.57cm x17.53cm)
Weight: 1.16 Lbs. (.526 kg)
1.3.2 Electrical Characteristics- STX 165 and STX 165R
Power Out: 200 Watts Nominal
Transmitter Freq: 1090 MHz
Receiver Freq: 1030 MHz
Receiver Sensitivity: -74dBm Nominal at 90% reply rate
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1.3.3 Operational Characteristics
1.3.3.1 STX 165 Panel Mount
Operational Voltage: 11-32Vdc
Current: All Current readings are with the encoder heater on
Aircraft Power PRF Squawk Code Watts Current
14Vdc 500 7777 13.16 .94A
14Vdc 500 1200 11.49 .82A
28Vdc 500 7777 21.14 .76A
28Vdc 500 1200 19.68 .70A
Operating Temp: -20oC - +55oC
Altitude: -1000’ - +35,000’
Encoder:
Altitude: -1000’ to +35,000’
Output: RS 232 (9600 or 1200 Baud, Installation Selectable)
Resolution RS 232 10’
Grey Code 100’
1.3.3.2 STX 165R Remote Unit
Operational Voltage 11-32Vdc
Current:
Aircraft Power PRF Squawk Code Watts Current
14Vdc 500 7777 5.06 .36A
14Vdc 500 1200 3.65 .26A
28Vdc 500 7777 5.12 .18A
28Vdc 500 1200 3.66 .13A
Operating Temp: -20oC - +55oC
Altitude: -1000’ - +35,000’
1.3.3.3 STP 78 OAT Probe (Optional)
TSO C88a, C106
Operating Temp: -55oC - +70oC
Altitude: 35,000’
1.3.4 Certi! cation
TSO: C74d (transponder)
C88b (encoder) STX 165 panel mount only
Software: DO-178B Level C
Environmental: DO-160F
STX 165 [(A4C4)X]CAB(SM)XXXXXXZBAB[BC][TT]M[XXXXX]XXXX
STX165R [(A4C4)X]CAB(SM)XXXXXXZBAB[BC][TT]M[XXXXX]XXXX
FCC ID YJL-DAF-JDX
“The conditions and test required for TSO approval of this article are minimum performance standards. It is the responsibility of those desiring to install the article either on or within a speci! c type
or class of aircraft to demonstrate that the aircraft installation conditions are within the TSO standards.
The article may be installed only if installation of the article is approved by the Administrator.
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Environmental Quali• cation Form for the STX 165 Mode C Transponder
NOMENCLATURE: STX 165, Airborne ATC Transponder Equipment
TYPE/MODEL/PART No.: STX 165 / 305832-[XX] & Electrical Install Kit P/N 305994
TSO NUMBER: C74d (Transponder)
C88b (Encoder)
MANUFACTURER’S SPECIFICATION AND/OR OTHER APPLICABLE SPECIFICATION:
STX 165 INSTALLATION MANUAL, P/N 306100-00
QUALIFICATION TEST PLAN, STX 165 AIRBORNE MODE A/C TRANSPONDER P/N 901016-QTP
MANUFACTURER: SANDIA AEROSPACE
ADDRESS: 3700 OSUNA RD NE, SUITE 711, ALBUQUERQUE, NM 87109
REVISION & CHANGE NUMBER OF DO-160 : REV F DATED December 6, 2007
DATE OF TESTS: 2012
CONDITION SECTION DESCRIPTION OF TESTS CONDUCTED
Temperature and Altitude
Low Temperature
High Temperature
In-Flight Loss of Cooling
Altitude
Decompression
Overpressure
4.3
4.5.5
4.5.2
4.5.4
4.6.1
4.6.2
4.6.3
Equipment Tested to Category A4/C4
-20oC Operating Cold Temp
+55oC Operating High Temp
Test not Applicable
35,000 feet
30,000 feet
-15,000 feet
Temperature Variation 5.0 Tested to Category C, 2C/Min
Humidity 6.0 Tested to Category A
Operational Shock and Crash
7.0 Tested to Category B, Aircra Type 5. Random Orientation
Safety
Vibration 8.0 Tested to Category S, Aircra Zone 2, Vib curve M
Explosion 9.0 Equipment Identi ed as Category X, No Test Performed
Waterproofness 10.0 Equipment Identi ed as Category X, No Test Performed
Fluids Susceptibility 11.0 Equipment Identi ed as Category X, No Test Performed
Sand and Dust 12.0 Equipment Identi ed as Category X, No Test Performed
Fungus 13.0 Equipment Identi ed as Category X, No Test Performed
Salt Spray 14.0 Equipment Identi ed as Category X, No Test Performed
Magnetic E ect 15.0 Equipment is Category Z
Power Input 16.0 Tested to Category B
Voltage Spike 17.0 Tested to Category A
Audio Frequency Susceptibility 18.0 Tested to Category B
Induced Signal Susceptibility 19.0 Tested to Category BC
Radio Frequency Susceptibility 20.0 Tested to Category TT
Radio Frequency Susceptibility 21.0 Tested to Category M
Lightning Induced Transient
22.0 Equipment Identi ed as Category X, No Test Performed
Susceptibility
Lightning Direct E ects 23.0 Equipment Identi ed as Category X, No Test Performed
Icing 24.0 Equipment Identi ed as Category X, No Test Performed
Electrostatic Discharge 25.0 Equipment Identi ed as Category X, No Test Performed
Flammability 26.0 Equipment Identi ed as Category X, No Test Performed
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