4RF Aprisa SRi User manual

Aprisa SRi Quick Start Guide 1.3.0 © 2021 4RF Limited. All rights reserved. This document is protected by copyright belonging to 4RF
Limited and may not be reproduced or republished in whole or part in any form without the prior written permission of 4RF Limited.
While every precaution has been taken in the preparation of this literature, 4RF Limited assumes no liability or errors and omissions,
or from any damages resulting from use of this information. The contents and any product specifications within it are subject to
revision due to ongoing product improvements and may change without notice. Aprisa and the 4RF logo are trademarks of 4RF
Limited. All other marks are the property of their respective owners.
Quick Start Guide
Aprisa SRi Radio

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Contents
Follow these steps to install and operate your Aprisa SRi radio:
1. Introduction ...................................................................................................... 3
Front Panel Connections................................................................................................. 3
LED Display Panel ........................................................................................................... 4
2. Installation ........................................................................................................ 5
2.1. Install the Aprisa SRi Radio and Connect the Protection Earth............................... 5
2.2. Connect the Antenna and Apply Power to the Aprisa SRi Radio ............................ 6
2.3. Connect to the Aprisa SRi Radio (via SuperVisor or CLI) ....................................... 7
3. Setup the Aprisa SRi Radio............................................................................. 8
4. Monitoring and Troubleshooting the Aprisa SRi Radio................................ 9
4.1. Monitor the Aprisa SRi Radio Signal Strength......................................................... 9
4.2. Fault Management and Troubleshooting................................................................. 9
4.3. Performance Monitoring (RF and Data Traffic)...................................................... 10
5. Compliance Considerations.......................................................................... 11

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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.

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LED Display Panel
The Aprisa SRi has an LED Display panel which provides on-site alarms / diagnostics without the need for
PC.
The LEDs indicate the following conditions:
OK
MODE
AUX
TX
RX
Flashing
Red
Radio has not
registered
Solid
Red
Alarm present
with severity
Critical, Major
and Minor
TX path fail
RX path fail
Flashing
Orange
Diagnostics
Function
Active
OTA software
distribution
Management
traffic on the
USB MGMT
port
Solid
Orange
Alarm present
with Warning
Severity
Device detect
on the USB
host port
(momentary)
Flashing
Green
Software
Upgrade
Successful
Tx / Rx Data
on the USB
host port
RF path TX is
active
RF path RX is
active
Solid
Green
Power on and
functions OK
and no alarms
Processor
Block is OK
USB interface
OK
Tx path OK
Rx path OK
LED Colour
Severity
Green
No alarm –information only
Orange
Warning alarm
Red
Critical, major or minor alarm
Ethernet and RS-232 RJ-45 LED Indicators
LED
Status
Ethernet Explanation
RS-232 Explanation
Green
On
Ethernet signal received
RS-232 device connected
Orange
Flashing
Data traffic present on the interface
Data present on the interface

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2.
Installation
The Aprisa SRi is shipped to you in a box containing an Aprisa SRi radio fitted with power connector.
The following figure shows a typical installation of the unit. The following sub-section describe the main requirements for
installation.
2.1.
Install the Aprisa SRi Radio and Connect the Protection Earth
The Aprisa SRi has four threaded holes (M4) in the base and two holes (for M5 screws) through the enclosure for mounting.
Mounting options include:
•DIN rail mounting with the Aprisa SRi Mounting Bracket (optional accessory part number ‘APSB-MBRK-DIN’)
•Wall and rack shelf mounting
•Outdoor enclosures
The Aprisa SRi mounting options are shown below:

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The Aprisa SRi has an earth connection point on the top left and the top right of the
enclosure. Use the supplied M4 screws to earth the enclosure to a protection earth.
The antenna feeder cable should use grounding kits for lightning protection as specified
or supplied by the coaxial cable manufacturer to properly ground or bond the cable outer.
Warning: If the Aprisa SRi is operated in an environment where the ambient temperature exceeds 50°C, the Aprisa SRi must
be installed within a restricted access location to prevent human contact with the enclosure heatsink.
2.2.
Connect the Antenna and Apply Power to the Aprisa SRi Radio
Connect the antenna to the antenna port TNC female connector. If the antenna is not available, terminate
the ‘TX / Ant’ port with a TNC male 50 ohm terminator (10 Watts min).
Warning: Do not directly connect the radio antenna port without attenuation of at least 40 dB. The receiver
can be damaged if signals greater than +10 dBm are applied to the antenna port.
The Aprisa SRi is operated from a DC source of voltage between +10 VDC and +30 VDC (negative earth) and
consumes up to 20 Watts. External power supplies are available from 4RF as accessories (see the Aprisa SRi
User Manual).
The power connector (Molex 2 pin female) is supplied fitted to the radio. Wire your power source to the
power connector (- / +) and plug the connector into the radio. The connector screws should be fastened to
secure the connector.
Note: The radio fuses will blow if the connected power supply is over voltage or the polarity is reversed.
Two spare fuses are located inside the enclosure (see the ‘Spare Fuses’ section of the Aprisa SRi User
Manual).
Turn your power source on. The radio LEDs will flash orange for one second and then the OK, MODE, AUX LEDs will light solid
green and the TX and RX LEDs will flash red. This is because the factory default Terminal Operating Mode for all Aprisa SRi
radios is set to Remote Station.
When the radio has been configured and has registered with the network, the TX and RX LEDs will be solid or flash green if the
network is operating correctly.
The Aprisa SRi radio is ready to operate.
Warning: On link operation, RF energy is radiated from the antenna. Do not stand in front of the antenna.

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2.3.
Connect to the Aprisa SRi Radio (via SuperVisor or CLI)
The Aprisa SRi has a factory default IP address of 169.254.50.10 with a subnet mask of 255.255.0.0.
Each radio in the Aprisa SRi network must be setup with a unique IP address on the same subnet.
If the IP address of the radio is known or is the default IP address, it can be changed via the Ethernet port:
•Setup your PC for a compatible IP address e.g. 169.254.50.1 with a subnet mask of 255.255.0.0.
•Connect your PC network port to one of the Aprisa SRi Ethernet ports.
•Open a browser and enter https://169.254.50.10.
Note: The Aprisa SRi has a Self Signed security certificate which may cause the browser to prompt a certificate
warning. It is safe to ignore the warning and continue. The valid certificate is ‘Issued By: 4RF-APRISA’ which can be
viewed in the browser.
•Login to the radio with the default login ‘admin’ and password ‘admin’.
•Change the IP address, Subnet mask and Gateway to network compatible IP addresses.
If the IP address of the radio is unknown, it can be changed via the Command Line Interface on the radio MGMT USB port:
•Connect your PC USB port to the Aprisa SRi MGMT USB port. USB to UART Bridge VCP Drivers are required to connect
the radio USB port to your PC. You can download and install the relevant driver from
https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers. Set the PC serial
port to 38,400 baud, 8 data bits, no parity and 1 stop bit, with no hardware flow control.
•Login to the radio with the default login ‘admin’ and password ‘admin’.
•At the command prompt >> type ‘cd APRISASR-MIB-4RF’ and enter.
- type ‘set termEthController1IpAddress xxx.xxx.xxx.xxx’ and enter.
- type ‘set termEthController1SubnetMask 255.255.0.0’ and enter.
- type ‘set termEthController1Gateway xxx.xxx.xxx.xxx’ and enter.

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3.
Setup the Aprisa SRi Radio
The Aprisa SRi has a factory default ‘Terminal Operating
Mode’of Remote Station.
One radio in the Aprisa SRi network must be setup as a Base
Station.
The other radios in the Aprisa SRi network are setup as
Remote Stations.
Set the required ‘Ethernet Operating Mode’.
Set the unique radio ‘Base Station ID' to be the same in your
entire network. Every base station and it’s attached
remote radios (i.e. base station network) shall have a
unique ‘Base station ID’ in case of close proximity or close
coverage between two or more base station networks.
Set the Aprisa SRi TX Power and Channel Size to comply
with your site license.
Setup the Aprisa SRi Zones / Channels.
Specific channels within the selected zone hop can be
disabled if there is a known transmission within the channel
that may cause interference to the operation of this
network. The minimum number of enabled channels is 50.
If a channel is selected in a zone that is disabled, the zone
will be enabled when the channel selection is saved. The
default is all zones enabled.
The zone frequencies are pre-defined in the Aprisa SRi for
the zone number. The zone frequencies are spaced at the
hop frequency of 62.5 kHz.
You can now configure the remaining terminal and network parameters and settings. Please refer to the Aprisa SRi User Manual
for detailed instructions, such as the radio security settings and more.

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4.
Monitoring and Troubleshooting the Aprisa SRi Radio
4.1.
Monitor the Aprisa SRi Radio Signal Strength
When the network is installed, the radio signal strength can be monitored on remote
stations by setting the radio to Test Mode.
To enter Test Mode, press and hold the TEST button on the radio LED panel until all
the LEDs flash green (about 3 - 5 seconds).
In Test Mode, the LED Display panel presents a real time visual display of the RSSI.
This can be used to adjust the antenna for optimum signal strength.
Note: The response time is variable and can be up to 5 seconds.
To exit Test Mode, press and hold the TEST button until all the LEDs flash red (about
3 –5 seconds).
The OK, MODE and AUX LEDs will be solid green and the TX and RX LEDs will be solid
or flash green if the network is operating correctly.
The RSSI result is displayed on the LED display panel as a combination of LED states.
For more information, please refer to the Aprisa SRi User Manual available from the 4RF website https://www.4rf.com/secure
(login required).
4.2.
Fault Management and Troubleshooting
The Aprisa SRi support extensive alarms for every section and building block of the device including the interfaces. SuperVisor
allows user to view the main summary alarm at the top of the SuperVisor page which mimic the device LEDs and in addition all
the detailed alarms of the device (see SuperVisor > Events > Alarm Summary). In addition, SuperVisor allows user to troubleshoot
any alarm issue by using the event history log page for more information about the alarm (see SuperVisor > Events > Event
History). For more information see the Aprisa SRi user manual.

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4.3.
Performance Monitoring (RF and Data Traffic)
The Aprisa SRi support extensive performance monitoring statistics and diagnostic per the device and per data ports. The Aprisa
SRi Terminal, Serial, Ethernet, Radio and User Selected Monitored Parameter results have history log views for both Quarter
Hourly and Daily. SuperVisor allows user to view trends of the performance monitoring parameters in graph or tabular format
(see SuperVisor > Monitoring). For more information see the Aprisa SRi user manual.

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5.
Compliance Considerations
The Aprisa SRi is a professional radio product and as such must be installed by a suitably trained and qualified installer who is
aware of the local regulatory requirements existing at the time of installation and is capable of ensuring that the regulations
are adhered to.
The maximum Equivalent Isotropic Radiated Power (EIRP) permitted from the Aprisa SRi is regulated and must not exceed the
limits provided in the following table. To meet this regulatory requirement; knowledge of the antenna gain and feeder cable
loss must be known before setting the transmitter output power.
Regulatory Requirement
Frequency Range
Maximum
EIRP1
SRi Equivalent Maximum
Average Power (RdBm)
USA, FCC Part 15.247
902 MHz to 928 MHz
+36 dBm PEP
+32 dBm
Canada, ISED RSS-247
902 MHz to 928 MHz
+36 dBm PEP
+32 dBm
Australia, ACMA AS/NZS 4268
915 MHz to 928 MHz
+30 dBm
+30 dBm
New Zealand, General User Radio
Licence for Short Range Devices
915 MHz to 928 MHz
+30 dBm
+30 dBm
New Zealand, General User Radio
Licence for Short Range Devices
920 MHz to 928 MHz
+36 dBm
+36 dBm
Brazil, Act No. 14.448, of December 4,
2017
902 MHz to 907.5 MHz &
915 MHz to 928 MHz
+36 dBm PEP
+30 dBm
Mexico, NOM-208-SCFI-2016
902 MHz to 928 MHz
+36 dBm PEP
+30 dBm
Peru
915 MHz to 928 MHz
+30 dBm
+30 dBm
The Aprisa SRi has a maximum mean output power of +26 dBm into a 50 ohm antenna which equates to a maximum peak power
of +30 dBm PEP. To determine the maximum power to be set on the Aprisa SRi, the following installation parameters must be
known:
1.
Aprisa SRi equivalent average power for maximum permitted EIRP (specified in dBm)
RdBm
2.
Antenna isotropic gain (specified in dBi)
GdBi
3.
Feeder coax loss between Aprisa SRi and antenna (specified in dB/m)
LdB/m
4.
Length of feeder coax between Aprisa SRi and antenna (specified in metres)
dm
From these the above information, the power setting of the Aprisa SRi (PdBm) can be calculated to ensure operation within the
regulatory requirements using the formula:
     
Antenna gain information can be obtained from the Antenna manufacturer and is either expressed in terms of dBi, referenced
to an isotropic radiator, or dBd, referenced to a dipole.
If the gain is expressed in dBd, it can be converted to dBi by adding 2.15 dB to the gain value.
The following is an example of transmitter power calculations:
Antenna Type
and Gain
Feeder Coax Length and Loss
Regulatory
Limit
Maximum SRi
Power Setting
Yagi, 11 dBi
10 m of ½” Heliax @ 0.11 dB/m gives 1.1 dB loss
+36 dBm PEP
22 dBm
Panel, 12 dBi
33 m of RG214 @ 0.22 dB/m gives 7.3 dB loss
+30 dBm
25 dBm
Dipole, 3.5 dBi
3 m of RG214 @ 0.22 dB/m gives 0.66 dB loss
+30 dBm
26 dBm
Grid, 18 dBi
15 m of ½” Heliax @ 0.11 dB/m gives 1.65 dB loss
+30 dBm
13 dBm
1
These are correct at the time of printing. The installer must ensure that the installation complies with the regulatory
requirements at the time of installation.

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Canada
This radio transmitter Aprisa SRi ISED: 6772A-SI902M160 has been approved by Industry Canada to operate with the antenna
types listed below with the maximum permissible gain indicated. Antenna types not included in this list, having a gain greater
than the maximum gain indicated for that type, are strictly prohibited for use with this device.
Cet émetteur radio Aprisa SRi ISED: 6772A-SI902M160 a été approuvé par Industrie Canada pour fonctionner avec les types
d'antenne énumérés ci-dessous avec le gain maximum autorisé indiqué. Les types d'antennes non inclus dans cette liste,
ayant un gain supérieur au gain maximum indiqué pour ce type, sont strictement interdits d'utilisation avec cet appareil.
Mexico
La operación de este equipo está sujeta a las siguientes dos condiciones:
(1) es posible que este equipo o dispositivo no cause interferencia perjudicial y
(2) este equipo o dispositivo debe aceptar cualquier interferencia, incluyendo la que pueda causar su operación no
deseada.
Este equipo ha sido diseñado para operar con las antenas que enseguida se enlistan y para una ganancia máxima de antena de
6 dBi.
El uso con este equipo de antenas no incluidas en esta lista o que tengan una ganancia mayor que 6 dBi quedan prohibidas. La
impedancia requerida de la antena es de 50 ohms.