Signal Specification, Digital Audio Broadcast Module (DABM): General

All the values given below are between connections stated in column 1 and connection #A1 in column 2 (power ground). This applies unless otherwise indicated in brackets.

NOTE:

It is important to connect the breakout box and check the ground terminals before taking readings.

U=	DC voltage in volts (V)	U_AC =	AC voltage in volts (V)
U_bat =	Battery voltage (V)	f =	Frequency in Hertz (Hz)
U_low =	Voltage approximately 0 V	t =	Time in seconds
PWM =	Pulse width modulated signal in %	% duty =	Duty cycle (pulse ratio) in percent (%)

Connector C1

Fig 1: Identifying Connector C784

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SIGNAL TABLE

Breakout box connection	Control module terminal	Signal type	Ignition on	Ignition off	Miscellaneous
#1	#C1-1	30 supply	U = U_bat	U = U_bat
#2	#C1-2	ground, 30 supply	U=U_low	U=U_low

Connector C2

Fig 2: Identifying Connector C2

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SIGNAL TABLE

Breakout box connection	Control module terminal	Signal type	Ignition on	Ignition off	Miscellaneous
-	#C2-1	Antenna signal	-	-	Input signal VHF Band 3
-	#C2-2	Antenna signal	-	-	Fender
-	#C2-3	Antenna signal	-	-	Input signal Band L
-	#C2-4	Antenna signal	-	-	Fender

Connector C3

Fig 3: Identifying Connector MOST (Optical Signal)

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SIGNAL TABLE

Breakout box connection	Control module terminal	Signal type	Ignition on	Ignition off	Miscellaneous
-	#C3-1	Optical	-	-	Output
-	#C3-2	Optical	-	-	Input