Installation guide
  SV-XPNDR-261/262 Installation, Configuration, and Testing 
SkyView System Installation Guide - Revision R    11-15 
  Navigate to the serial port that you physically connected the transponder module to in the 
previous steps. 
  Select either “Dynon 261 Transponder” or “Dynon 262 Transponder” as appropriate for the 
module you own. Note that other fields are automatically configured and cannot be 
changed. Press ACCEPT. 
  Exit SETUP. Repeat on any other displays on your SkyView system. 
The data transmitted between the SkyView display and the SV-XPNDR-261/262 nominally 
includes encoded altitude data from SkyView’s ADAHRS. Therefore, no other altitude encoder 
hardware or SkyView serial port setup is required. However, some locales may require the use 
of a certified altitude encoder with the Dynon SV-XPNDR-261/262 Transponder. SkyView 
supports external serial altitude encoders that use Icarus/Garmin format. When one is 
connected, the SV-XPNDR-261/262 uses the external altitude encoder data source instead of 
SkyView’s own ADAHRS-generated pressure altitude. However, the altitude displayed by 
SkyView on the PFD page is ALWAYS sourced from SkyView ADAHRS data. 
To have SkyView use an external altitude serial encoder as the pressure altitude source for the 
SV-XPNDR-261/262: 
1.  Wire a SkyView serial receive line to the respective serial transmit connection from the 
serial altitude encoder. If your SkyView system has multiple displays, this connection 
must be made to all SkyView displays in parallel. 
1.  Ensure there is a shared ground between the SkyView display and the serial altitude 
encoder. 
2.  Configure this serial port on each display under SETUP MENU > SYSTEM SETUP > SERIAL 
PORT SETUP. The SERIAL IN device for this serial port should be set to ICARUS/GARMIN 
ALTITUDE. 
Transponder Settings 
The aircraft tail number must be set in SETUP > SYSTEM SETUP > AIRCRAFT 
INFORMATION > TAIL NUMBER prior to configuring the transponder. 
The following settings need to be configured before testing and using the transponder. They 
are all accessed under SETUP MENU > TRANSPONDER SETUP: 
  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 http://www.airframes.org 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 http://registry.faa.gov/aircraftinquiry/. 
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, 










