NAV Super Flag Output:

Output capable of driving positive logic NAV Super

(Pin 10)

Flag by sourcing up to 500mA for flag out of view (NAV

 

valid).

RS422 input:

Input capable of receiving serial OBS data from

(Pins 11 & 27)

Collins Pro Line 2 EFIS DSP unit.

GPS approach arm low:

Input, when grounded, controls approach mode.

(Pin 9)

 

GPS OBS:

Capable of interfacing with a standard OBS resolver.

(Pins 4,14,35 and 37)

 

ARINC 429 Input A & B:

Input capable of receiving data from ARINC 429 (low

(Pins 32 & 33)

speed) devices as listed in Section 4.

Battery +,-, Charge Enable Connection for GARMIN remote battery accessory. (Pins 30, 34, 29)

1.2.3.2 26 PIN CONNECTOR (J102)

MIC Audio Hi and Lo::

Input requiring 275mV RMS into 470 ohm load.

(Pins 2 and 3)

(Standard carbon or dynamic MIC containing

 

transistorized pre-amp.)

MIC Key:

Input, when grounded, keys the transmitter.

(Pin4)

 

COMM Audio Hi and Lo:

Output capable of driving a 500 ohm load with

(Pins 5 and 6)

100mW.

MIC Intercomm:

Input requiring 125mV RMS into 470 ohm load.

(Pin 8)

(Standard carbon or dynamic MIC containing

 

transistorized pre-amp.)

Remote Transfer:

Input, when grounded, swaps the active and

(Pin 10)

standby COMM frequencies.

TX Interlock:

Input, when grounded, reduces receiver sensitivity

(Pin 12)

so squelch will not break when another transceiver is

 

keyed.

Altimeter input:

Capable of receiving encoded output data from any

(Pins 14-24)

parallel altimeter device.

Remote Enter:

Input, when ground, functions the same as the enter

(Pin 26)

key on the GNC 300 front panel.

Av. Kit Install. Manual

190-00067-02 Rev. J

Page 7