Dynon SkyView HDX - Performing Transponder Checks

SV-XPNDR-261 Transponder Installation and Configuration
12-30 SkyView HDX System Installation Manual - Revision E
Message
Message Explanation
Recommendation
REMOTE HOT (value)
Transponder is receiving
excessive heat; value is
Temperature (°C).
Check location of transponder
for exposure to excessive heat.
RX PSU FAIL
Internal diagnostic warning.
Internal fault, contact Dynon
Avionics Technical Support to
arrange for repair or
replacement.
SQUITTER FAIL
Extended Squitter data not
transmitted.
Internal fault, contact Dynon
Avionics Technical Support to
arrange for repair or
replacement.
TX POWER LOW (value)
Transmit power output is low;
value is Power output.
Generally, this is an installation
issue with antenna, feedline, or
the connector. Check the
antenna, feedline, or 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.
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.
12.8 Performing Transponder Checks
Transponder checks require manual switching to ALT and GND mode.
A Dynon Avionics SV-XPNDR-261 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 between ALT and GND mode, you
must temporarily reconfigure the transponder: SETUP MENU > TRANSPONDER SETUP
> AUTO ALT/GND > NONE > EXIT (button).