MDS 05-4846A01, Rev. C
SD Series Ref. Manual (Packet & Transparent Mode)
17
Normally, the transceiver is adequately grounded if the supplied flat
mounting brackets are used to mount the radio to a well-grounded metal
surface. If the transceiver is not mounted to a grounded surface, it is rec-
ommended that a safety ground wire be attached to one of the mounting
brackets or a screw on the transceiver’s case.
The use of a lightning protector is recommended where the antenna
cable enters the building; Bond the protector to the tower ground, if pos-
sible.
4.5 Serial Data Interfaces
COM1
and
COM2
on the front panel serve as the serial interface ports for
radio management and payload data, respectively. The following sec-
tions identify the pin functions used on each interface. These ports are
user-configurable for specific applications. The procedures for changing
their default operation are provided later in this manual.
NOTE:
Not all PCs include a serial port. If one is not available, a USB
port may be used with a USB-to-Serial adapter and appropriate
driver software. These devices are available from several
manufacturers.
COM1 (Management) Connections
Although it may be configured differently, the radio’s
COM1
port
(Figure 15) is the primary interface for PC management or diagnostics
of the radio. It is used at the time of installation to set basic parameters
such as output power, modem type and operating frequency. PC connec-
tion and terminal setup details are given in “Initial Configuration” on
Page 22.
For typical applications, a straight-through DB-9 cable may be used for
PC management. If desired, a cable may be constructed as shown in
Figure 16, using Pins 2 (RXD), 3 (TXD), and 5 (Ground). Table 6 lists
all
COM1
pins.
Figure 15. COM1 Connector (DB-9F)
As viewed from outside the unit
5
9
6
1
