Dynon Avionics SkyView System Installation Guide - Manual (Page 222)

SV-XPNDR-261/262 Installation, Configuration, and Testing
11-2 SkyView System Installation Guide - Revision S
The SV-XPNDR-261/262 transponder responds to both legacy Mode A/C interrogations and to
Mode S interrogations from both ground radar and airborne collision avoidance systems. In all
cases, the interrogations are received by the transponder on 1030MHz, and replies are
transmitted on 1090MHz.
(US-Only) Equipping Your Plane for full compliance with FAA 2020 ADS-B OUT Mandate
The FAA 2020 ADS-B OUT mandate is codified in FAR 91.225 and 91.227. In general, these
regulations require that starting on January 1, 2020, if you operate an aircraft in, below, or
above Class B or Class C airspace, or above 10,000 feet in Class E airspace, an airplane plane
must be equipped with:

A Class 1 Mode S transponder with 1090ES ADS-B Extended Squitter that meets the
performance required in 91.227 (or UAT; Dynon’s solution uses the former)

The GPS supplying position data to the above transponder must meet the specific
performance requirements as defined in 91.227.
As a TSO C166B device, the Dynon Avionics SV-XPNDR-261 meets the transponder and ADS-B
transmission requirements for 91.225 and 91.227.
However, the Dynon Avionics SV-GPS-250 GPS Antenna / Receiver module does not meet the
requirements for 91.227, as it has not demonstrated compliance with the performance
required in the FAR. Specifically, the SDA and SIL of the SV-GPS-250 are non-compliant.
To comply with 91.227, a compliant GPS source must be used for ADS-B position reports.
Additionally, 91.227 requires that the entire ADS-B out system has been verified to be
compliant, which means that the ADS-B out transmitter and GPS position source have been
demonstrated to be compatible with one another. Currently, the Dynon SV-XPNDR-261 has not
demonstrated compliance with any specific GPS position source to the FAA. Dynon has the data
required to demonstrate compliance for the Freeflight 1201/1203, and the Garmin GNS (WAAS
only) and GTN GPS navigators, and is in process of obtaining compliance authorization from the
FAA.
It is important to note that in the US, the ADS-B Out “mandate” and its associated GPS
requirements do not go into effect until January 1, 2020, and the mandate only requires
compliance in specific airspaces. If you do not already have an appropriately TSO’d WAAS IFR
GPS navigator - such as the Garmin GTN or GNS (WAAS only) series - in the aircraft, SkyView will
send its uncertified GPS position to the SV-XPNDR-261/262 . Until January 1, 2020, it is
acceptable for the SV-XPNDR-261 to transmit use the (uncertified) GPS position data from the
SkyView System’s SV-GPS-250, and after 2020 is it acceptable to use this data if you do not fly in
ADS-B required airspace. Note that after 2020, only the (Class 1) SV-XPNDR-261 is capable of
meeting the 2020 ADS-B Out mandate. The (Class 2) SV-XPNDR-262 cannot be used for 2020
Read and understand the System Planning Chapter before installing the SV-
XPNDR-261/262.