Dynon Avionics SkyView System Installation Guide - Manual (Page 238)

SV-XPNDR-261/262 Installation, Configuration, and Testing
11-18 SkyView System Installation Guide - Revision S
XPNDR HEX CODE NOT SET will appear if a transponder is configured in SkyView,
but the HEX CODE is not set to a valid number.

VFR CODE: When the pilot presses the VFR button, a pre-programmed code will replace
the current squawk code. The pre-programmed code is set up here; the choice of code will
depend on the normal location of the aircraft. In the USA, the VFR squawk code is 1200. In
most parts of Europe, the VFR squawk code should be set to 7000.

AUTO ALT/GND: Allows the transponder to automatically switch between Airborne and
Ground modes. Available options include:
o NONE : Automatic switching disabled
o SQUAT SWITCH LOW ON GND: Utilizes a physical squat switch connected the SV-
XPNDR-261/262 per the above instructions. When this option is selected, the
transponder will consider the aircraft to be on the ground when this switch is low
(electrically grounded).
o SQUAT SWITCH LOW IN AIR: Utilizes a physical squat switch connected the SV-
XPNDR-261/262 per the above instructions. When this option is selected, the
transponder will consider the aircraft to in flight when this switch is low (electrically
grounded).
o AUTOMATIC (AIR DATA): The transponder automatically determines whether the
aircraft is in flight or not by using a combination of GPS and air data changes from
SkyView. 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.

ADS-B IN FREQUENCY:
If an SV-ADSB-470 is installed and configured under SETUP MENU > SYSTEM SETUP
> SERIAL PORT SETUP, this option will be unavailable: The SV-ADSB-470
automatically receives ADS-B In traffic and weather via the 978 MHz UAT
frequency band.
Note that the options in the ADS-B IN FREQUENCY only have an effect with
transponder software 2.02 or above. See the Transponder Software Updates
section below for more information about transponder software.

If an SV-ADSB-470 is not installed and configured, the following settings are accessible:
o NONE – Set to NONE if there is no ADS-B IN equipment on board.
o 1090 MHz ES – Use this option if there is (non-Dynon) ADS-B IN equipment on
board that receives on 1090 MHz.
o 978 MHz UAT – Use this option if there is (non-Dynon) ADS-B IN equipment on
board that receives on 978 MHz.