WDS P20, Installation And Operation Manual

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9
Invisible place holder
Figure 5. Repeater system configuration using
a Redundant Station
A repeater works by re-transmitting data from the outlying remote site
to the master station and vice versa. The repeater introduces a small
amount of end-to-end transmission delay, but this is not a problem in
most systems.
The geographic location of a repeater station is especially important. A
site must be chosen that allows good communication with both the
master and the outlying remote site. This is often on top of a hill, or other
elevated terrain from which both sites can be “seen” by the repeater sta-
tion antennas. A detailed discussion on the effects of terrain is given in
the transceiver’s Installation and Operation Manual.
5.0 INSTALLATION
This section presents installation steps for:
• Installing transceiver(s) in a Redundant Transceiver Chassis.
Use these steps to install an existing MDS transceiver into the
Redundant Transceiver Chassis.
• Installing the Redundant Transceiver Chassis. Use these
steps to connect wiring and program the transceivers in the
Redundant Transceiver Chassis at the master or remote loca-
tion.
• Configuring the Redundant Transceiver Chassis as a
repeater in a repeater-assisted system (optional).
• Optimizing radio performance.
RTU
NULL-MODEM CABLE
P-20 RADIO
XX10 OR P-20
POLLING MASTER
RADIO
REMOTE
RADIO
REPEATER LINK
HOST
COMPUTER
P-20 RADIO
POINT-TO-POINT
LINK
REMOTE
RADIO
REMOTE
RADIO
RTU
RTU