Avionics Bending: Radio Altimeter - Pinout

For today's pinout I have the pinout for a Collins Radio Company Radio Altitude Indicator type 339H-2. This one again is a unit that was very commonly found on Lockheed as well as Boeing aircraft. This device actually has a number of interesting functions, such as decision hight alert and a miniature airplane that moves with the decision height along the scale. See the functional description below.

The schematic of the instrument is pretty straight forward. There are some pins missing in the schematic ... namely the ones for instrument lighting.

Finally here is the collected pinout:

Format: Connector | Pin | Function

P3	B	28VAC Power
P3	G	Ind Maint. Annunciator +28V
P3	H	-30V
P3	J	+30V
P3	K	Comparator Warning
P3	M	Altitude Valid 28VDC
P3	Y	Auxiliary Altitude Value
P3	Z	Auxiliary Altitude - GND