User's Manual

2-4 044-05xxx Rev A
2-5.2 Combo Connector
The power, alarm, control, and RF connections on the amplifier are made through a 21WA4 male
connector, located on the rear of the amplifier. Pins are listed and described in Table 2-3. Alarms are
interpreted by the amplifier sub-rack and reported to the base station as a system level alarm.
A1
A2
A3
A4
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17
Figure 2-2. Combo Connector (Male, on Rear of G3L-929-135 Amplifier Module)
Table 2-3. G3L-929-135 Amplifier Combo Connector Signal List
Pins/Signal Names
A1 RF Input (Coaxial Contact)
A2 +27 Vdc (Power Contact)
A3 Ground (Power Contact)
A4 RF Output (Coaxial Contact)
1 TX H (RS-485) 10 System Reset TTL
2 TX L (RS-485) 11 NC
3 GND 12 NC
4 RX H (RS-485) 13 AMP AO
5 RX L (RS-485) 14 AMP A1
6 GND 15 AMP A2
7 MOD_DET 16 NC
8 Summary Fault 17 MCPA Temp
9 DC (On/Off)