Dynon Avionics SkyView Classic - Performing Transponder Checks

SV-XPNDR-261/262 Installation and Configuration
SkyView System Installation Guide - Revision AA 11-43
Message
Message Explanation
Recommendation
connector. A visual
inspection is often not
sufficient to find the fault
with the antenna, feedline,
or connector.
TX PSU HIGH (value)
Transmitter power supply
output is abnormally high;
value is Volts.
Internal fault, contact Dynon
Avionics Technical Support
to arrange for repair or
replacement.
TX PSU LOW (value)
Transmitter power supply
output is abnormally low;
value is Volts.
Check power being supplied
to SV-XPNDR-261/262.
TX RESTART
Internal diagnostic warning
Remove and re-apply power
to transponder.
TXPNDR FAULT
Generic fault message
Internal fault, contact Dynon
Avionics Technical Support
to arrange for repair or
replacement.
Table 79 – SV-XPNDR-261/262 Self Diagnostic Messages
Performing Transponder Checks
Transponder checks require manual switching to ALT and GND mode.
A Dynon Avionics SV-XPNDR-261/262 is normally configured to automatically switch between
GND and ALT mode based on airspeed and other parameters – SETUP MENU > TRANSPONDER
SETUP > AUTO ALT/GND > AUTOMATIC (AIR DATA). In this mode, in the XPNDR menu, the GND
button does not appear, and the ALT button will not change mode unless you are in flight.
Note that some aircraft may be equipped with a squat switch for transponder mode control;
before changing AUTO ALT/GND, record which squat switch configuration is set; you will need
this information to restore AUTO ALT/GND to this setting after transponder testing is complete.
To be able to manually switch the SV-XPNDR-261/262 between ALT and GND mode, you must
temporarily reconfigure the transponder: SETUP MENU > TRANSPONDER SETUP > AUTO
ALT/GND > NONE > EXIT (button).
The SV-XNDR-261/262 can now be manually switched to ALT and GND modes: XPNDR > ALT
and XPNDR > GND.
After transponder testing is complete, remember to return the transponder to its
normal configuration: (typically) SETUP MENU > TRANSPONDER SETUP > AUTO
ALT/GND > AUTOMATIC (AIR DATA) or the squat switch configuration as
previously recorded.