SkyView - Dynon Avionics

SV-XPNDR-26X Installation, Configuration, and TestingSQUAT SWITCH: The Squat switch input allows the transponder to automatically switchbetween Airborne and Ground modes. Set as appropriate if you have connected aphysical squat switch to the SV-XPNDR-26X per the above instructions.AIRCRAFT CATEGORY: To assist ATC tracking of aircraft, an aircraft category can betransmitted by Mode S transponders. Set as appropriate for your aircraft.AIRCRAFT LENGTH: Your aircraft’s length in your current distance/speed units (meters orfeet)AIRCRAFT WIDTH: Your aircraft’s width in your current distance/speed units (meters orfeet)TRANSMIT TEST SQUITTERS: Because of limitations in the ATC radar computer systems,in US airspace the FAA require ADS-B equipped aircraft to periodically transmit theirMode A squawk code in an ADS-B squitter message. This allows the computer system toreconcile conventional radar traces with ADS-B information in a mixed surveillanceenvironment. Because the Mode A code does not form part of the base ADS-B messageset, the code is sent in a “TEST” message.Because different regulatory authorities have not agreed on the behavior of the TESTmessage, the installer must select the local preferred behavior. For aircraft registered inthe USA, the TEST message should always be transmitted. For other airworthinessapproval authorities, the preferred behavior is to apply a geographical filter so thatthese messages are only sent when the aircraft is visible to US radar systems. Because ithas a GPS position input, the transponder already knows the geographic position of theaircraft, and therefore in this case, the recommended option setting for these messagesis “Only in America”.MAXIMUM CRUISE SPEED: Mode S transponders can transmit their maximum airspeedcharacteristics to aircraft equipped with TCAS. This information is used to help identifythreats and to plan avoiding action by the TCAS equipped aircraft. The airspeeds aregrouped in ranges. Set as appropriate for your aircraft.TIS TRAFFIC: Enables the display of TIS traffic on the SkyView Map page when in an areaserved by a TIS-enabled radar. Note that TIS is a Mode S uplink service that is providedby some US approach radars. TIS coverage is limited to the coverage areas of thoseradars; there is no TIS provision outside the USA. If another traffic device is connected toSkyView and is set up correctly, its traffic information will trump the TIS traffic from theSV-XPNDR-26X, regardless of this setting.GPS DATA: Future software updates will allow the SV-XPNDR-26X to receive datadirectly from a GPS that is capable of meeting the FAA’s 2020 ADS-B Out requirements.Since the SV-XPNDR-26X will need an update to support TSO C166b, this setting shouldcurrently always be set to SKYVIEW. See the Serial GPS Position Input section above foradditional details.GPS STATUS: Displays whether the SV-XPNDR-26X is receiving valid GPS data.11-14 SkyView System Installation Guide - Revision J