08/01/2015 System Description This Transceiver is a fully integrated 978mhz UAT ADS-B radio transceiver along with a WAAS GPS (non-certified version) and WiFi transmitter. The main unit also contains circuitry to interface with a panel mounted display and a Mode A/C/S transponder.
08/01/2015 Regulatory Compliance 1.2.1 SkyGuardTWX Transceiver Part Numbers: Universal Access Transceiver UAT1000-EX TSO-C154c (UAT) Automatic Dependent Surveillance-Broadcast (ADS- B) Equipment Operating on Frequency of 978MHz. Unit “meets the performance requirements of TSO-C154c” when installed in Experimental or LSA aircraft per FAA rule change enacted on February 9, 2015.
SkyGuardTWX UAT Transceiver supports the following control panel interfaces for acquiring an ATC assigned squawk code: Compatible Transponders may be configured to act as a control panel for the SkyGuardTWX ADS-B UAT Transceiver. These transponders are: GTX™ 320, GTX™ 327, GTX™ 330, King KT76, Narco, Tera.
ADS-B radio. Once such app. for the Apple iPad/iPhone is SkyGuardTWX which is available for free download from the Apple Store.” The Vision-Pro Plus transceivers have a squawk detector circuit to retrieve the Mode C Transponder squawk code and pressure altitude code.
Length: 9.300 inches (includes mounted antennas) Weight: 1.4 lbs (excluding antenna cables and power cable) Environmental: The SkyGuardTWX ADS-B Transceiver is designed and tested to meet the categories as defined in RTCA/DO- 160F: Operating temperature: -20°C to +55°C Storage temperature: -55°C to +85°C...
08/01/2015 System Interfaces The SkyGuardTWX UAT Transceiver must be configured so that it will acquire a Transponder squawk code and pressure altitude code from the “Ownship” Transponder. This is accomplished with the automatic squawk detector circuit contained in the Vision-Pro Plus Transceiver.
Installation Mounting The SkyGuardTWX Transceiver should be mounted to a rigid surface able to withstand inertial forces imposed by the 1.4 pound unit. The transceiver may be mounted using 4 bolts/nuts and 8 washers where the washers are placed on both the bolt side and nut side.
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08/01/2015 Figure 3: External Antenna Connections Figure 4: System I/F and Power Connections...
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08/01/2015 The external GPS antenna should not be mounted close to VHF COM transmitter antenna, and other antennas emitting high power. Special care should be taken to ensure that the GPS antenna is not mounted in close proximity to antennas that may emit harmonic interference at the L1 frequency of 1575.42 MHz.
Use 18 AWG or larger for power wiring. A 9 pin D-Sub connector (female) interfaces to external equipment. This connector can be found at the rear of the SkyGuardTWX Transceiver unit. The following list shows the definition of the individual pins in this connector.
The Transceiver power connector to interface with aircraft power can be found at the rear end of the SkyGuardTWX Transceiver unit. A specific “locking power plug” is included as part of the installation kit. The center conductor of this power plug should be connected to the + VDC power source for the unit.
The SkyGuardTWX Transceiver supports interfacing with a panel mounted Transponder for acquisition of transponder squawk codes and pressure altitude codes. Normally this would not be required as the SkyGuardTWX Transceiver contains a circuit that can wirelessly listen to the Transponder to collect the squawk code and pressure altitude code.
If using an iPad/iPhone to perform this initial configuration, first download the SkyGuardTWX app. Make sure you SkyGuardTWX Transceiver is powered on and has a valid GPS position fix. Then, on your Apple device, go into “Settings” and turn ON Airplane mode.
Occasionally while in flight, ATC make request that you change your aircraft squawk code. The SkyGuardTWX UAT transceiver has the ability to listen to your Mode A/C/S Transponder and the squawk code it is currently transmitting. As you enter the ATC requested squawk code on your transponder, this number will get automatically updated into the SkyGuardTWX UAT Transceiver.
UAT Transmitter to perform this test. Power on the aircraft avionics power bus. Allow SkyGuardTWX Transceiver GPS to acquire a GPS position fix. Power on the test instrument or secondary UAT Transmitter. Verify on flight display to see aircraft target displayed on your aircraft moving map.
Follow the guidelines in AC 43.13-1B, Chapter 10, Section 2. Update the aircraft equipment list indicating the items relocated, added or removed. The weight of the SkyGuardTWX UAT Transceiver is 1.4 pounds not including antennas, antenna cables, and power wiring. Depending on where the unit is installed, the CG of the aircraft should be recalculated using standard methods utilizing the weight and arm values.
The SkyGuardTWX Transceiver does not require regular cleaning. Tune-Up Procedure The SkyGuardTWX Transceiver is tuned at the factory. No tune-up procedure or servicing is required by the user. Should you suspect an issue with your Transceiver, then contact SkyGuardTWX for further instructions.
SkyGuardTWX is not responsible for any future changes to the NextGEN system that might make this ADS-B Transceiver incompatible with these changes. SkyGuardTWX is not liable for damages as a result of use or misuse of this ADS-B Transceiver. Important Pilot Advisory Note Regarding Safety of Radio Frequency Energy: Safe use of this device requires care as to the placement of the transmitter antenna.
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