Page 4-8
GMA 347 Installation Manual
Revision A
190-00325-01
4.3.4 Marker Beacon Functions
Marker Beacon connections are listed in the following table. The antenna input is connected to pins 78
(HI or Center Conductor) and 59 (LO or Shield).
Table 4-6. Marker Beacon Pin Assignments, J3472
Pin
Pin Name
Description
I/O
34
MIDDLE MARKER SENSE
2.5-8 Vdc into 4.7 k
Out
74
AIRWAY/INNER MARKER EXT
LAMP OUT
MKR I-HI white 2.5-8 Vdc into 56
Out
75
MIDDLE MARKER EXT LAMP OUT
MKR M-HI amber. 2.5-8 Vdc into
56
Out
76
OUTER MARKER EXT LAMP OUT
MKR O-HI blue. 2.5-8 Vdc into 56
Out
78
MARKER ANTENNA HI
Marker antenna input, 50
In
59
MARKER ANTENNA LO
Ground reference for pin 78
--
4.3.5 Installation Selection Inputs
The following table shows the Installation Selection Inputs of J3472. The selection inputs have an input
and a program ground. When the input is grounded, the input function is selected.
Table 4-7. Installation Selection Inputs Pin Assignments, J3472
Pin
Pin Name
Description
I/O
4
RECORDER PLAY*
In
5
PROGRAM GROUND
An external pushbutton switch activates voice
recorder playback.
--
17
COM SWAP*
In
18
PROGRAM GROUND
When enabled, COM 1 and COM 2 are
swapped. This is used with a switch tied to
ground for momentary operation.
--
24
RECORDER OFF SELECT*
In
25
PROGRAM GROUND
When enabled, the voice recorder is disabled.
--
26
AUXILIARY SOURCE SELECT*
This input is used for an external switch tied to
ground to control the auxiliary audio.
In
65
TEL DISCRETE RINGER*
This input is for use with a cellular phone with a
digital output.
In
* Denotes Active Low (Ground to activate).
Содержание GMA 347
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