Huawei BTS3900C Hardware Description page 182

BTS3900C (Ver.C)
Hardware Description
An RCU is a driving motor used for the phase shifter in the RET antenna. It receives control commands from a
base station and runs the commands to drive the stepper motor. Using a gear, the stepper motor drives the
adjustable phase shifter in the antenna and changes the downtilt angle.
Exterior
An AISG multi-wire cable has a waterproof DB9 male connector at one end and a standard AISG
female connector at the other end, as shown in
Figure 7-49 AISG multi-wire cable
(1) Waterproof DB9 male connector
Pin Assignment
Table 7-42
Table 7-42 Pin assignment for the wires of an AISG multi-wire cable
X1 End (Pin of the
Waterproof DB9
Male Connector)
X1.1
X1.3
X1.5
X1.4
X1.9 and X1.4 are
interconnected.
-
Issue 03 (2013-05-27)
NOTE
describes the pin assignment for the wires of an AISG multi-wire cable.
X2 End (Pin of the
Standard AISG
Female Connector)
X2.1
X2.3
X2.5
X2.4
-
X2.1 and X2.6 are
interconnected.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Figure 7-49.
(2) Standard AISG female connector
Color Type
White and
Twisted
blue
pair
Blue
White and
Twisted
orange
pair
Orange
White and -
green
- -
- -
7 BTS3900C Cables
Description
+12 V
RS485 B
RS485 A
GND
GND
+12 V
173