Transponder Operation
6-2
SkyView Pilot’s User Guide - Revision M
a.
SBY: The transponder is on, but will not reply to any interrogations. This is the
mode that the transponder is in when none of the modes below are active.
b.
GND: The transponder will respond to Mode S ground interrogations from
surface movement radar.
c.
AUTO (replaces GND, above): Available when the transponder is configured to
automatically switch between ALT/GND automatically (see the SkyView System
Installation Guide for details). When AUTO is selected, the transponder will
automatically switch between ALT and GND modes - reflected in the transponder
status in the top bar – using a combination of GPS and air data changes.
d.
ON: The transponder will respond to all interrogations, but altitude reporting is
suppressed.
e.
ALT: The transponder will respond to all interrogations.
f.
IDT: Displayed while the transponder is broadcasting an ident after the IDENT
button is pressed at ATC’s request.
g.
Big red “X” (covering entire transponder status area): Indicates an error, either
with the transponder itself or in the communication between the transponder
module and SkyView. The transponder is not responding to interrogations. Check
the wiring and settings between the transponder module and SkyView if you are
authorized to maintain your aircraft. Contact Dynon Technical Support for
further assistance.
Reply Status: The reply indicator illuminates when the transponder replies to
interrogations.
When connected properly, third party transponders such as the Garmin GTX 330
and GTX 327 can provide status as described above. However, they cannot be
controlled from the SkyView display as the SV-XPNDR-26X can.
Transponder Menu
Figure 52 - Transponder Menu Example
When the Dynon SV-XPNDR-26X transponder module is installed and configured, the
Transponder Menu becomes accessible from the Main Menu by pressing XPNDR (MAIN MENU
> XPNDR). All transponder operation can be accomplished from this menu. There is no
dedicated or separate control panel needed (or available). Due to the momentary way in that
the transponder controls are used, the XPNDR menu is conveniently cleared after a few
seconds of inactivity.