Crin Aprisa 4RF Especificaciones técnicas

FICHA TECNICA DE:

RADIO APRISA 4RF

Product Description

Aprisa SR Product Description

Compliance General

The Aprisa SR digital radio predominantly operates within frequency bands that require a site license be

issued by the radio regulatory authority with jurisdiction over the territory in which the equipment is

being operated.

It is the responsibility of the user, before operating the equipment, to ensure that where required the

appropriate license has been granted and all conditions attendant to that license have been met.

Changes or modifications not approved by the party responsible for compliance could void the user’s

authority to operate the equipment.

Equipment authorizations sought by 4RF Communications are based on the Aprisa SR radio equipment

being installed at a fixed location and operated in point-to-multipoint mode within the environmental

profile defined by EN 300 019, Class 3.4. Operation outside these criteria may invalidate the

authorizations and / or license conditions.

The term “Radio” with reference to the Aprisa SR User Manual, is a generic term for one end station of a

point-to-multipoint Aprisa SR network and does not confer any rights to connect to any public network or

to operate the equipment within any territory.

Compliance ETSI

The Aprisa SR radio is designed to comply with the European Telecommunications Standards Institute

(ETSI) specifications as follows:

Radio performance EN 300 113-2

EMC EN 301 489 Parts 1 & 5

Environmental EN 300 019, Class 3.4

Safety EN 60950-1:2006

Frequency band Channel size Power input Notified

body

136-174 MHz 12.5 kHz 12 VDC

400-470 MHz 12.5 kHz 12 VDC

| 3

Aprisa SR Product Description

RF Exposure Warning

WARNING:

The installer and / or user of Aprisa SR radios shall ensure that a separation distance

as given in the following table is maintained between the main axis of the terminal’s

antenna and the body of the user or nearby persons.

Minimum separation distances given are based on the maximum values of the

following methodologies:

1. Maximum Permissible Exposure non-occupational limit (B or general public) of

47 CFR 1.1310 and the methodology of FCC’s OST/OET Bulletin number 65.

2. Reference levels as given in Annex III, European Directive on the limitation of

exposure of the general public to electromagnetic fields (0 Hz to 300 GHz)

(1999/519/EC). These distances will ensure indirect compliance with the

requirements of EN 50385:2002.

Frequency (MHz) Maximum Power

(dBm) Maximum Antenna

Gain (dBi) Minimum Separation

Distance

(m)

136 + 37 15 2.5

174 + 37 15 2.5

330 + 37 15 2.5

400 + 37 15 2.5

470 + 37 15 2.3

520 + 37 15 2.2

850 + 37 28 7.7

960 + 37 28 7.2

Contents | 5

Aprisa SR Product Description

Contents

1. Introduction................................................................................7

The 4RF Aprisa SR Radio......................................................................... 7

Product Overview ................................................................................ 8

Network Coverage and Capacity ........................................................ 8

Remote Messaging......................................................................... 8

Repeater Messaging....................................................................... 9

Product Features................................................................................10

Functions ..................................................................................10

Performance ..............................................................................10

Usability ...................................................................................10

Architecture......................................................................................11

Security...........................................................................................12

Interfaces.........................................................................................13

Antenna Interface........................................................................13

Ethernet Interface .......................................................................13

USB Interfaces ............................................................................13

RS-232 Interface..........................................................................13

Product Options .................................................................................14

Dual Antenna..............................................................................14

Mounting..........................................................................................15

DIN Rail Mounting ........................................................................15

Rack Shelf Mounting .....................................................................16

Wall Mounting.............................................................................17

2. Specifications............................................................................ 18

RF Specifications ................................................................................18

ETSI Compliant............................................................................18

Frequency Bands ..................................................................18

Channel Sizes ......................................................................18

Product Range .....................................................................18

Transmitter.........................................................................19

Receiver ............................................................................19

Modem ..............................................................................20

Data Payload Security ............................................................20

Interface Specifications ........................................................................21

Ethernet Interface .......................................................................21

RS-232 Asynchronous Interface.........................................................21

Power Specifications............................................................................22

Power Supply..............................................................................22

Power Consumption......................................................................22

Power Dissipation ........................................................................22

General Specifications..........................................................................23

Environmental ............................................................................23

Mechanical ................................................................................23

ETSI compliance..........................................................................23

6| Contents

Aprisa SR Product Description

3. Management ............................................................................. 25

SuperVisor........................................................................................25

Viewing the Aprisa SR Terminal Settings..............................................25

Configuring the Aprisa SR Terminal Details...........................................26

Configuring the Aprisa SR RF Network Details .......................................26

Configuring the Aprisa SR Radio Settings .............................................27

Command Line Interface.......................................................................28

Management Display Panel.....................................................................29

LED Display Panel ...............................................................................30

Normal Operation ........................................................................30

Software Upgrade ........................................................................30

Test Mode .................................................................................31

4. Applications.............................................................................. 32

Basic point-to-multipoint application........................................................32

Advanced point-to-multipoint application with repeater .................................33

Multi-interface point-to-multipoint application ............................................34

5. Architecture ............................................................................. 35

Product Description.............................................................................35

Frame ......................................................................................35

MAC Header ........................................................................35

Network Header ...................................................................36

Payload ....................................................................................36

Auxillary Frame...........................................................................36

Physical Layer.............................................................................37

Data Link Layer / MAC layer............................................................37

Channel Access ....................................................................37

Hop by Hop Transmission.........................................................37

Network Layer ............................................................................38

Packet Routing.....................................................................38

Product Operation...............................................................................39

Carrier Sense Disabled...................................................................39

Carrier Sense Enabled ...................................................................40

Product Architecture ...........................................................................43

Radio Block Diagram.....................................................................44

Modem Block Diagram ...................................................................44

6. Contact Us................................................................................ 45

Introduction | 7

Aprisa SR Product Description

1. Introduction

The 4RF Aprisa SR Radio

The 4RF Aprisa SR is a point-to-multipoint digital radio providing secure narrowband wireless data

connectivity for SCADA, infrastructure and telemetry applications.

The radios carry a combination of serial packet data and Ethernet data between the Base Station,

Repeater Stations and Remote Stations.

The Aprisa SR is configurable as a point-to-multipoint Base Station, a Remote Station or a Repeater

Station.

8| Introduction

Aprisa SR Product Description

Product Overview

Network Coverage and Capacity

In a simple point-to-multipoint network, an Aprisa SR, configured as a base station, will communicate with

multiple remote units in a given coverage area. With a link range of up to 60 km a typical deployment will

have 30 – 50 remote stations attached to the base station. However, geographic features, such as hills,

mountains, trees and foliage, or other path obstructions, such as buildings, tend to limit radio coverage.

Additionally, geography may reduce network capacity at the edge of the network where errors may occur

and require retransmission. However, the Aprisa SR uses Forward Error Correction (FEC) which greatly

improves the sensitivity performance of the radio resulting in less retries and minimal reduction in

capacity.

Ultimately, the overall performance of any specific network will be defined by a range of factors including

the geographic location, the number of remote stations in the base station coverage area and the traffic

profile across the network. ). Effective network design will distribute the total number of remote stations

across the available base stations to ensure optimal geographic coverage and network capacity.

Remote Messaging

Base stations are fitted with omni-directional antennas and the remote stations use directional Yagi

antennas for higher gain. On start-up the base station transmits a registration message which is recognised

by the remote stations which respond with their own registration message. This allows the base station to

record the details of all the remote stations active in the network.

There are two message types in the Aprisa SR network, broadcast messages and unicast messages.

Broadcast messages are transmitted by the base station to the remote stations and unicast messages are

transmitted by the remote station to the base station.

All the remote stations, within the coverage area, will receive the messages broadcast from the base

station, but only the radio the message is intended for will action the message. Only the base station can

receive the unicast messages transmitted from the remote station. Unicast messages are ignored by other

remote stations which may be able to receive them. The Aprisa SR network is not designed for remote

stations to communicate with other remote stations.

Introduction | 9

Aprisa SR Product Description

Repeater Messaging

The Aprisa SR uses a routed protocol throughout the network whereby messages contain source and

destination addresses. Upon registration, the radios populate an internal neighbor table to identify the

radios in the network. The remote stations will register with a base station, or a repeater, and the

repeater registers with a base station. In networks with a repeater, the repeater must register with the

base station before the remotes can register with the repeater.

Additionally, all messages contain a ‘message type’ field in the header and messages are designated as

either a ‘broadcast’ message, originating from a base station, or a ‘unicast’ message, originating from a

remote station.

In a network with a repeater, or multiple repeaters, the base station broadcasts a message which contains

a message type, a source address and a destination address. The repeater receives the message and

recognizes it is a broadcast message, from the message type and source address and re-broadcasts the

message across the network. All remote stations in the coverage area will receive the message but only

the radio with the destination address will act upon the message.

Similarly, the remote station will send a unicast message which contains a message type (unicast) a source

address and a destination address (the base station). The repeater will receive this message; recognize

the message type and source address and forward it to the destination address.

It is this methodology which prevents repeater-repeater loops. If there is repeater (A) which, in some

circumstances, is able to pick up the RF signal from another repeater (B), it will not forward the message

as it will only forward broadcast messages from the base station (recognised by the source address). For

unicast messages the repeater (A) will recognize that the message (from repeater (B)) is not from a

remote with which it has an association and similarly ignore the message.

10 | Introduction

Aprisa SR Product Description

Product Features

Functions

•Point-to-Point (PTP) or Point-to-Multipoint (PMP) operation half duplex

•Licensed frequency bands:

VHF 136-174 MHz

UHF 330-400 MHz †

UHF 400-470 MHz

UHF 450-520 MHz†

UHF 850-960 MHz†

•Channel sizes: 6.25 kHz†

12.5 kHz

25 kHz†

•Typical deployment of 30 Remote Stations from one Base Station with a practical limit of a few

hundred Remote Stations.

•Dual antenna option for external duplexers or filters (half duplex operation)

•Ethernet data interface plus RS-232 asynchronous data interface.

•Data encryption and authentication.

•Complies with international standards, including ETSI RF, EMC, safety and environmental

standards.

†Future Product Release

Performance

•Long distance operation (typically 30 km radius).

•High transmit power.

•Low noise receiver.

•Forward Error Correction.

•Electronic tuning over the frequency band.

•Thermal management for high power over a wide temperature range.

Usability

•Configuration / diagnostics via front panel Management Port USB interface, Ethernet interface.

•Remote station configuration / diagnostics over the radio link.

•LED display for on-site diagnostics.

•Optional management display for advanced on-site configuration.

•Firmware upgrade and diagnostic reporting via the Host Port USB flash drive.

•Simple installation with integrated mounting holes for wall, DIN rail and rack shelf mounting.

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