GPS 155XL/GNC 300XL Installation Manual
P/N 190-00067-22 Rev E Page 3-8
Figure 3-3. View of J102 Connector From Back of Rack
J101 PIN
PIN FUNCTION
1
RESERVED
2
MIC AUDIO HI (GNC 300XL)
3
MIC AUDIO LO (GNC 300XL)
4
MIC KEY (GNC 300XL)
5
COMM AUDIO HI (GNC 300XL)
6
COMM AUDIO LO (GNC 300XL)
7
RESERVED
8
MIC INTERCOM (GNC 300XL)
9
RESERVED
10
REMOTE TRANSFER (GNC 300XL)
11
RESERVED
12
TRANSMIT INTERLOCK (GNC 300XL)
13
SEQUENCE HOLD LOW
14
ALTITUDE D4
15
ALTITUDE A1
16
ALTITUDE A2
17
ALTITUDE A4
18
ALTITUDE B1
19
ALTITUDE B2
20
ALTITUDE B4
21
ALTITUDE C1
22
ALTITUDE C2
23
ALTITUDE C4
24
ALTITUDE COMMON
25
GROUND
26
REMOTE ENTER
Table 3-3. J102 Pin Functions
3.11
COMM ANTENNA INSTALLATION CHECK (GNC 300XL)
Check for insertion loss and VSWR. VSWR should be checked with an in-line type wattmeter inserted in the coaxial
transmission line between the transceiver and the antenna. Any problem with the antenna installation will most likely
be seen as a high reflected power. A VSWR of 3:1 will result in a 25% loss in power.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
