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Transponder: Difference between revisions
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* altitude-valid indicates if altitude value is valid data or not | * altitude-valid indicates if altitude value is valid data or not | ||
Input properties, under 'inputs' | ====Input properties, under 'inputs'==== | ||
* knob-mode sets the transponder operating mode. This corresponds to the KT-70 knob positions for convenience, but the actual modes should work for any transponder instrument. | * knob-mode sets the transponder operating mode. This corresponds to the KT-70 knob positions for convenience, but the actual modes should work for any transponder instrument. Knob modes are documented below | ||
* ident-button can be set to place the transponder in ident mode for 18 seconds. Note this property is not spring-loaded, i.e you must manually reset it to false | * ident-button can be set to place the transponder in ident mode for 18 seconds. Note this property is not spring-loaded, i.e you must manually reset it to false | ||
* digit[0]-[4] properties allow the id code individual digits to be read and set | * digit[0]-[4] properties allow the id code individual digits to be read and set | ||
In KT-70 compatibility mode, additional properties are read and set, to preserve legacy aircraft. Do not use these properties in new aircraft. | |||
====Knob/Functional Modes==== | |||
0 - off | |||
1 - standby, basically the same as off for the C++ code (3D instrument would power up the display, presumably) | |||
2 - test, again the C++ largely ignores this since the test configuration of real-world instruments varies. In particular the unit does *not* for altitude or transmitted-id to any test values, you should do that in your own logic. (Maybe we should allow the test values to be defined int he config section?) | |||
3 - Ground mode, responds to altitude interrogation but does not broadcast an ID. This would typically be used while taxiing prior to takeoff. | |||
4 - On, normal operation but altitude transmission is inhibited | |||
5 - Alt, same as on but altitude is broadcast if transponder was configured in Mode-S or Mode-C | |||