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1.
Introduction
The 4RF Aprisa SRi is a Point-To-Multipoint (PMP) digital radio providing 915 MHz Industrial (unlicensed) License Free Spread
Spectrum communications. The radios carry a combination of serial data and Ethernet data between the base station and
remote radios. A single Aprisa SRi is configurable as a Point-To-Multipoint base station or remote radio.
This guide provides a quick startup and basic installation instructions for the Aprisa SRi radio shown in the next figure below.
A more detailed User Manual is also available. Refer to the User Manual for important warning, cautions and notes and any
detailed management relating to fault, configuration, maintenance, performance monitoring, and security.
Front Panel Connections
All connections to the radio are made on the front panel. The functions of the connectors are (from left to
right):
Designator
Description
10 - 30 VDC; 3A
+10 to +30 VDC (negative ground) DC power input using Molex 2 pin male screw
fitting connector.
AC/DC and DC/DC power supplies are available as accessories.
ETHERNET 1 & 2
Integrated 10Base-T/100Base-TX layer-3 Ethernet switch using RJ45 connectors.
Used for Ethernet user traffic and product management.
SERIAL 1 & 2
Two ports of RS-232 serial using RJ45 connector.
Used for RS-232 asynchronous user traffic.
Host Port using a USB standard type A connector.
Used for software upgrade and diagnostic reporting and optional: 1x RS-232
asynchronous port with USB to RS-232 converter.
ALARM
Alarm Port using a RJ45 connector.
Used for two alarm inputs and two alarm outputs.
MGMT
Management Port using a USB micro type B connector.
Used to access the radio Command Line Interface (CLI).
PROTECT
Protect port. Not used for the SRi.
ANT
TNC, 50 ohm, female connector for connection of antenna feeder cable for half
duplex RF operation.