Installation guide

SkyView System Installation Guide - Revision R 11-1
11. SV-XPNDR-261/262 Installation, Configuration, and Testing
There are two transponder modules offered by Dynon Avionics. The SV-XPNDR-262 is a Class 2
transponder that is limited to use beneath 15,000 feet and under 175 knots. The SV-XPNDR-261
is a Class 1 transponder that can be used above those limitations. Throughout this manual, they
are often referred to together as the SV-XPNDR-261/262 for instructions that apply to both
versions.
The SV-XPNDR-261/262 Mode S transponder models are DO-181D compliant Mode S level 2els
datalink transponders, with support for ADS-B extended squitter, which also meets the relevant
environmental requirements of DO-160F/ED-14F. The SV-XPNDR-262 has a nominal power
output of 125 Watts, and meets the power output requirements for Class 2. The SV-XPNDR-261
has a nominal power output of 250 watts, and meets the power output requirements for Class
1. The ADS-B function meets DO-260B class B0 for the SV-XPNDR-262 and class B1S for the SV-
XPNDR-261. The SV-XPNDR-261/262 is certified to ETSO 2C112b and ETSO C166a, and to FAA
TSO C112c and C166b.
The SV-XPNDR-261/262 transponder is controlled using SkyView’s on-screen menu system. This
allows the transponder to be mounted separately from the instrument panel and reduces the
amount of panel space taken by the transponder. SkyView also provides pressure altitude
directly to the transponder, eliminating the need for a separate altitude encoder.
The SV-XPNDR-261/262 transponder runs from either 14 volt nominal or 28 volt nominal DC
power supply with no configuration changes required.
If upgrading from a version of SkyView software prior to v5.0, v5.0 and later
contain a software upgrade to the SV-XPNDR-261/262. This software update adds
the option to have the transponder automatically switch modes as the transition
between ground operation and flight is detected.
This software upgrade also updates the ADS-B out capability of the transponder to
meet TSO-C166B for ADS-B Out functionality. This change REQUIRES that the
physical transponder module be labeled to indicate the new TSO authorization.
Failure to perform this physical modification at the same time as the software
update will result in a transponder which is likely not considered airworthy by
aviation regulatory agencies.
Please refer to the Transponder Software Updates section of this chapter for
further details about this process.
The FAA’s ADS-B rule currently permits class A1, A1S, A2, A3, B1S, or B1
transponder-based 1090ES ADS-B transmissions for compliance once the ADS-B
Out rules go into effect. Therefore, only the higher power class B1S SV-XPNDR-261
will be able to meet the 2020 ADS-B Out requirement.