Electrical Connections; Figure 1. Layout Of Rear Panel; Table 1. Rear Panel Connections - Simoco SDB680 Installation Manual

SDB680 – INSTALLATION GUIDE

ELECTRICAL CONNECTIONS

This section gives an overview of the external connections that are made to the SDB680 Base Station. It also
provides details of the pin-outs for these connections.
G
ENERAL
All cabling should be installed so that the equipment can be accessed for servicing purposes without
straining the cables or connectors used.
Where equipment is rack mounted, cables must be run so that the unit can be fully withdrawn on its runners
without straining, catching or pinching any of the cables.
Cables should be dressed into cable trays etc where available and run so as to reduce likelihood of damage
from vermin or adverse environments.
Multi-strand wires must be used wherever the wire will be flexed by accessing the equipment.
R P C
EAR ANEL ONNECTORS
The rear panel of the SDM680 DMR base station showing all the external connections is shown below in
Figure 1. The functions of each connector on the rear panel are detailed in Table 1.

Table 1. Rear Panel Connections.

Connector # Conn Type
DC IN
S2 RS232
S1 D Type
P5 RJ45
P4 USB Type B
P3 USB Type A
Tx N Type
Rx 1 BNC
Tx/Rx Connections
The Tx antenna connection on the SDB680 Base Station is provided with a 50
while for the Rx antenna connection a 50
The Tx antenna cable connections must be made with 50
Wave Ratio (VSWR) of the Tx and Rx connections should be tested prior to use by using of a suitable test
set, e.g. an Anritsu/Wiltron S331A. A VSWR of 1.5:1 or better at the relevant Tx and Rx frequencies should
be ensured.
Mating connectors should be galvanically compatible with nickel outer and gold centre pin to minimise
passive intermodulation.
May 15

Figure 1. Layout of Rear Panel.

Function Description
Power I/P 14.0 V DC power input
Serial Port
Facilities
Ethernet 10/100 base-T RJ45 Ethernet connector
Peripheral USB peripheral interface
Host USB interface
Tx O/P RF Power output from the Tx
Rx I/P Rx input for full duplex operation
female Bayonet Neill-Concelman (BNC) socket is used.
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female N-type socket,
N-type on flexible tails. The Voltage Standing
ELECTRICAL CONNECTIONS
TNM-I-E-0046