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XPDR Air Type Transponder v1.3

For use on aircraft

This device default start with squawk code 1200 for general aviation.
Set your assigned squawk code, the device will announce itself every few seconds when not getting a ping from any SSR station.
This device response with GPS data and altitude when pinged with assigned squawk code.
(also include 6-char aircraft type in reply)
The "ID" button for "IDENT" will send the "IDENT" signal when response to ping.
The "ID" button will stay glow for a short duration and reset itself.

2020/02/12 This device is now with built-in memory to save callsign assigned by SSR station.

Has receive and transmit indicator on screen

*This XPDR never report heading or speed*
Heading and speed will be calculated by ATC controller on ground (SSR)

Due to being forced to use new antenna, this V1 requires 2 antennae to keep full-duplex mode functioning.

See XPDR v2 for Half-duplex built
https://steamcommunity.com/sharedfiles/filedetails/?id=1990775553