User's Manual

mBSC0800S-005-RUCM11
MBSC2100-005-RUCM11 April 15, 2013
Page 21
Figure 16 RTM Interior Layout
3.3.3.1.2 Multiplexer & Duplexer
The multiplexer separates the various band frequencies respectively. The duplexer is used to make the
bi-directional signals into simplex signals and provides sufficient isolation.
3.3.3.1.3 RF-Optic Transceiver
The RF-Optic Transceiver is an optical module providing conversion between RF signals and optical signals
over a single fiber. The optical module converts the downlink optical signal from the FIU module in the host
unit, and it also converts the uplink RF signal to an optical signal and simultaneously sends it back to FIU
module in the host unit for distribution to the BIU modules. A laser and received optical power monitor and
alarm are provided.
Table 6 RF-Optic Transceiver Interface
#
Port Device Description
1 RF OUT SMA female coaxial connector RF output
2 RF IN SMA female coaxial connector RF input
3 OPTIC IN/OUT E2000/APC Fiber interface (HU & RN)
4 --- DB9 female Power supply & monitoring
Table 7 DB9 PINOUTS
# PIN Definition Description
1 PIN1 NC
2 PIN2 GND
3 PIN3 VCC +12V DC
4 PIN4 TXD1/B1 Channel1: RS485-B1
5 PIN5 RXD1/A1 Channel1: RS485-A1
6 PIN6 RXD0/A0 Channel0: RS485-A0
7 PIN7 LD ALM Laser Device error