Dynon Avionics SkyView System Installation Guide User Manual
Page 237
SV-XPNDR-261/262 Installation, Configuration, and Testing
SkyView System Installation Guide – Revision S
11-17
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DIRECT (FREEFLIGHT): FreeFlight 1201 or 1204 GPS, connected directly to SV-
XPNDR-261/262 pin 3, transmitting at 19200 baud. Using this setting causes the
transponder to transmit the following ADS-B performance parameters:
SIL: 2 (Level C integrity)
NACp: Sent from GPS to transponder. Refer to GPS documentation.
NIC: Sent from GPS to transponder. Refer to GPS documentation.
NACv: 1 (10m/s accuracy)
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DIRECT (GARMIN ADS-B): Garmin GNS 400W/500W series (WAAS) or Garmin
GTN series, both with appropriate software updates as designated by Garmin,
connected directly to SV-XPNDR-261/262 pin 3, transmitting at 9600 baud in
“Garmin ADS-B” format. Note that this option only works with transponder software
2.02 or above. See the Transponder Software Updates section below for more
information about transponder software. Using this setting causes the transponder
to transmit the following ADS-B performance parameters:
SIL: 2 (Level C integrity)
NACp: Sent from GPS to transponder. Refer to GPS documentation.
NIC: Sent from GPS to transponder. Refer to GPS documentation.
NACv: 1 (10m/s accuracy)
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SKYVIEW: SkyView reports its GPS position to the transponder via its nominal
SkyView<>SV-XPNDR-261/262 serial connection. Using this setting causes the
transponder to transmit the following ADS-B performance parameters:
SIL: 0 (Unknown integrity)
NACp: 8, 9 or 10. Dynamic, as reported by GPS.
NIC: 8 (Containment radius <0.1 NM)
NACv: 1 (10m/s accuracy)
PRESSURE ALTITUDE: Displays status of pressure altitude input for the transponder
TAIL NUMBER: Displays tail number (set in SYSTEM SETUP > AIRCRAFT INFORMATION)
AIRCRAFT HEX CODE: The Mode S Code is a 24 bit number issued to the aircraft by the
registration authority for the aircraft. The website
provides HEX
CODEs for most countries’ aircraft that can be directly inputted into SkyView. The HEX CODE
is the value shown in the ICA024 result field. Alternatively, Mode S codes for US-registered
aircraft can be found at the FAA aircraft registry at
The FAA aircraft register shows both the octal number and the hexidecimal. Setting up the
SV-XPNDR-261/262 requires the hexidecimal number (base 16) format; SkyView cannot
accept the Octal (base 8) or Decimal (base 10) format. If you only have the octal number,
you must convert it to hexadecimal. There is an Octal to Hexadecimal converter tool
available in the Support section
The HEX CODE needs to be set to the aircraft’s assigned code for the transponder
to function properly. The default code of 000000 is not a valid code. If the code is
left at 000000, the transponder will only work in SBY mode. A caution message –