Adeunis RF ARF 73 User manual

UHF Professional Data modem
User Guide
09-07-V1-smn / 206883
A

No part of this document may be reproduced or transmitted (in electronic or
paper version, photocopy) without Adeunis RF consent.
This document is subject to change without notice.
All trademarks mentioned in this guide are the property of their respective
owner.
ADEUNIS RF
283, rue Louis Néel
38920 Crolles
France
Phone [phone]
Fax [phone]
Ref. 09-07-V1-smn

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User Guide
Ref. 09-07-V1-smn p 1
Table of Contents
Table of Contents..............................................................................1
About this document.........................................................................2
Declaration of conformity .................................................................3
Download of the user guide................................................... 3
Overview...........................................................................................4
Product Power supply .......................................................................4
Serial link wiring...............................................................................5
Radio communication .......................................................................6
Radio communication ............................................................ 6
Radio channels...................................................................... 6
Radio rate selection............................................................... 7
Power output........................................................................ 8
RSSI reading......................................................................... 8
Modem operating mode ....................................................................8
Command mode.................................................................... 9
Transceiver mode.................................................................10
Transparent mode................................................................11
Addressed mode ..................................................................11
Transceiver state machine ....................................................11
AT Commands .................................................................................13
Description ..........................................................................13
Set of commands .................................................................13
Register description..............................................................14
Specifications..................................................................................18
General technical characteristics............................................18
Radiofrequency....................................................................18
Transmitter..........................................................................18
Receiver ..............................................................................18
Protocol...............................................................................19
Glossary ..........................................................................................20
ANNEX : Firmware updates.............................................................20

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User Guide
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About this document
This guide describes the A
RF73
devices, their options and accessories.

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RF73
User Guide
Ref. 09-07-V1-smn p 3
Declaration of conformity
Manufacturer’s name: ADEUNIS R.F.
Manufacturer’s address Parc Technologique PRE ROUX IV
283 rue Louis NEEL
38920 CROLLES - FRANCE
declares that the product if used and installed according to the user guide available on our web
site www.adeunis-rf.com
Product Name: ARF73
Product Number(s): ARF7499BD
Product options:
complies with the RTTE Directive 99/5/EC:
EMC: conformity is proven by compliance to the harmonized standard EN 301-489
Safety: conformity to the standard EN 60950-1/2001
Radio: conformity is proven by compliance to harmonized standard EN 300-113 covering
essential radio requirements of the RTTE directive.
Exposure to radio frequency signals: Regarding the 1999/519/EC recommendation, when using
the device, keep the product’s antenna at least 1 m from your body at maximum power level.
This distance could be reduced for lower power levels.
For more information, please contact Adeunis RF technical offices.
This product works in licensed frequency bands. Please don’t hesitate to contact us if
you need support on this item and want to know how to address the market in such
bands.
Crolles, May 12th, 2009
VINCENT Hervé / Quality manager
Download of the user guide
Thank you for having chosen the ADEUNIS RF products. The user guide is downloadable
on our web site www.adeunis-rf.com
Index Products
Paragraph Modems > Data modem
Print version available upon request
9Tel : [phone]
9Email : [e-mail]

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User Guide
Ref. 09-07-V1-smn p 4
Overview
The ARF73 modem range provides data transmission solution for applications
requiring very long distances or working in very severe environment.
This product is available in a robust IP65 housing and is provided with an
antenna, a cable including RS232 data transmission wires and power supply.
The modem offers a transceiver mode and a command mode which allow
various configuration of the product (serial data rate, frequency and channel
selection, mode of transmission…).
This product has to be used in licensed frequency band and may be available
for 400 to 470MHz frequency range. The product is calibrated during factory
process on a dedicated sub-band and can be adjusted in +/-3.5MHz range by
using the command mode of the product.
Product Power supply
The ARF73 product is supplied from a DC voltage source. Required voltage is
10V minimum and must not exceed 28V.
The positive ‘+’ polarity must be applied on the red cable. The input voltage
is protected against reverse polarity and short transient voltage.
The total power consumption is less than 1.5A under 12V at full RF power, so
it is recommended to use a DC power 0-30V which can source at least 2A.
Positive DC
Negative DC
Serial link

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The green “ON” led is continuously lighted when the ARF73 is powered on.
Serial link wiring
The ARF73 is delivered with an RS232 cable interface with a female SUBD-9.
The modem is wired as a DCE equipment.
The outgoing data from the modem are wired on pin 2. The incoming data
from the external equipment comes on pin 3. Pin 5 is used to connect GNG
between the external equipment and the modem.
Pin 1, pin 4 and pin 6 are internally wired together.
There is no hardware flow control lines wired to the modem.
Internal SUBD9 connection

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Radio communication
Radio communication
Radio communication is performed when the modem is set in transceiver
mode (this is the default at power-up).
The radio data rate is fixed to 9600bps.
The output power may be programmed to 0.5W, 2W or 4W to either optimize
covered range or power consumption.
Radio channels
The S250 registers determined the center frequency of the bandwidth of the
modem. The modem is calibrated during factory process on this central
frequency which can not be changed by using command mode. For this
reason, S250 is a read only register.
By default, the modem is delivered with a predefined frequency table
recorded in S200 register. The central frequency corresponding to the S250
register can be found in this table at position 8. First frequency of the table is
referred has position 0.
The frequency table can freely (with respect of 12.5kHz of spacing) be
changed using command mode of the product in a range of +/-3.5MHz
around the central frequency displayed in S250. Note that the frequency
must be written with 4 digits after the point even if they are zeros. Each new
frequency must be separated by entering a <CR> char.
The channel selected from the frequency table for radio transmission and
reception is set in S201 register. S201=0 corresponds to the first channel of
the frequency table, S201=15 is the last one.

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The predefined table is setup with the following values:
Channel
S200 Frequency ≡S200 (MHz)
0 S250 – 400kHz
1 S250 – 350kHz
2 S250 – 300kHz
3 S250 – 250kHz
4 S250 – 200kHz
5 S250 – 150kHz
6 S250 – 100kHz
7 S250 – 50kHz
8 S250 frequency
(central frequency
calibrated in factory
process)
9 S250 + 50kHz
10 S250 + 100kHz
11 S250 + 150kHz
12 S250 + 200kHz
13 S250 + 250kHz
14 S250 + 300kHz
15 S250 + 350kHz
Radio rate selection
The radio rate is determined by the S254 register. For now, the only RF link
speeds available is 9600bps.
Channel
S254 RF link speed (bps)
0 Not available
1 Not available
2 9600

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Power output
The RF output power is selected by the S231 register. There is 3 RF output
power available, 500mW, 2W and 4W.
Channel
S231 RF output (W)
0 0.5
1 2
2 4
After a long use at 4W, the radiator and the box can warm until 65°C without
spoiling the working.
RSSI reading
The RSSI (Received Strength Signal Indicator) gives an indication for the
received power level of the last demodulated frame. It is available in S230
register. This level must be used with care due to dispersion between
components.
Modem operating mode
Two operating modes are available:
•Command mode for modem setup
•Transceiver mode for transmission on radio link
At power up the modem is in transceiver mode: it is able to send or receive
data to or from the radio link according to its current configuration.

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Command mode
The command mode is used to read and update the modem configuration
registers using AT command. In command mode the radio reception and
transmission is inhibited.
Entering command mode:
The command mode is entered by issuing a +++ sequence on the serial link.
The three consecutive + characters are accepted if no character have been
sent before and after the +++ sequence for a minimal duration defined by
the S214 register. The S214 value is defined in ms.
Channel
S214 Default value
0 240
TIPS 1
The freeware “Hercules” terminal from
http://www.hw-
group.com/products/hercules/index_en.html can help user to transmit the
+++ sequence according to the timing rules of S214 by sending a text file
which contain the +++ string.
TIPS 2
Exiting command mode (return back in transceiver mode): send the serial
command
ATO <cr>
EASY CHECK
When receiving a right command, modem will answer:

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Ref. 09-07-V1-smn p 10
•‘O’<cr><lf> (ASCII character 0x4f,0x0d,0x0a) for accepted
command (meaning OK)
•‘E’<cr><lf> (ASCII character 0x45,0x0d,0x0a) for error (meaning
ERROR)
Transceiver mode
In transceiver mode, two protocols are available:
•Transparent protocol
•Addressed protocol
The communication is always half-duplex. The radio transmission is processed
prior to the radio reception (when the transceiver is sending a radio frame, it
is not able to decode any incoming radio frame).
If no data are sent on the serial link, the modem is waiting for radio
reception. Each radio frame sent by another modem is received and the data
extracted from the radio frame are sent on the serial link. When the last
character has been sent on the serial link, it is possible to send an answer
after the end of this last character.
All the data received on the serial link are encapsulated in a radio frame.
The radio frame format depends on the used protocol.
When acting as transceiver, the radio frame transmission always starts under
the following conditions:
Detection of a silence greater than S217 value (in ms) after the first
char (after the last transmitted frame) transmitted on the RS232
lines,
Or when the number of received characters from the serial link is
higher to the maximum radio frame size defined in S218 (in number
of chars).

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Transparent mode
In transparent mode, the modem acts as a wired serial link. It means that
alternately, the modem sends on the radio the data received from the serial
link and sends on the serial link the data received from the radio.
The radio frame format is :
•<Preamble><synchro>DATA <postambule>.
Preamble, synchronisation and postambule are used for the radio
reception.
Addressed mode
In addressed mode, data received on the serial link are sent on the radio link
with the following format:
•<Preamble><synchro><Address> DATA <postambule>.
Preamble, synchronisation and postambule are used for the radio
reception.
•The Address field is set up with S256 value.
•In reception mode: The <Address> field of the radio frame is
checked with the reception address contained in S252
•If the radio frame address matches the transceiver reception
address (S252), DATA (and only DATA) are transmitted on the
serial link
Otherwise received data are silently discarded.
Transceiver state machine
When operating in transceiver mode the 'RF transmission' state machine is:
Idle state of the transceiver: by default the transceiver is waiting for
incoming data on the RS232 link and for incoming radio frame on the radio
link.
The RS232 link has a higher priority than the radio link (if a radio frame is
demodulated meanwhile some RS232 characters are detected on the serial
link, the radio frame will be discarded and the RS232 incoming data will be
processed).

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Processing incoming RS232 data: the incoming RS232 data are
internally buffered. The buffered data are sent in a radio frame (the RF
modulation is started) when almost one of the following conditions occurs:
when a break (silence greater than S217 timeout) is detected on
the incoming serial flow (no more data to be sent).
When the radio buffer size is reached (the number of buffered
characters is equal or greater than the S218 size).
Processing incoming radio frame: the valid data are extracted from
the incoming radio frame and internally buffered. The buffered data are sent
on the fly to the RS232 module output.

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AT Commands
Description
AT commands are interpreted only when the transceiver is in Command
mode.
Command: are used to read and update the modem parameters
A command starts with the 2 ASCII ‘AT’ characters. ‘AT’ means ‘Attention’
followed with one or several characters or other data.
Each command is ended with <cr> (carriage return).
Set of commands
Commands Description
Operating mode selection
ATO Return into normal mode
<silence>+++<silence> Command mode activation
Registers management
ATSn ? Displays the Sn register content where n represents
the register number. The response has the following
format:
Sn=y<cr><lf>
ATSn=m Set the register value with ‘m’. n represents the
register number.
AT&W Saves the new register configuration in EEPROM. Each
time you switch on the modem, the EEPROM
configuration will be loaded in the modem registers
AT/S Displays all register values. The response has the
following format:

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Sxxx=y<cr><lf> for each register. The command
ends with a double <CR><LF> sequence.
AT/V Software version display.
ATR Restore the register default values. Note that S235
and S250 are not restored by ATR.
Register description
Type Register Function Description Default
Value Note
Radio management
R/W S200 Channel table Set channel table -
R/W S201 Channel
number Select radio channel from the table:
From 0 up to 15
8
R S204 Preamble
duration Preamble duration unit in ms.
40
R/W S217 Serial Time out
for radio Serial timeout before starting radio
transmission, unit ms.
From 3 up to 240
3
R/W S218 Radio frame
length Size of the radio frame (from 1 up to 240).
When this size is reached:
the transceiver sends a
radio frame
3
R S230 RSSI level Display the reception level
of the latest received
message. Response
S230=-xxxdBm<cr><lf>
(with xxx decimal value)
none
R/W S231 RF out level Adjust the RF output level
0Æ500mW (27dBm)
1Æ2W (33dBm)
2

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2 Æ4W (36dBm)
R S250 Receiver
Frequency BW Indicates the bandwidth adjustment of the
helicoidal receiver filters.
Format is 438.5000
Depending
on
customer
demand
R/W S220 Over the air
format 0 Æaddressed mode 1 Ætransparent mode
0
R/W S252 Reception
address From 0 up to 255 Used in addressed protocol
only, for filtering incoming
frame
0
R/W S256 Transmission
address From 0 up to 255 Used in addressed protocol
only, added to out coming
frame
0
R S254 RF link speed 2 Æ9600 bps
2
R/W S255 Squelch 0 ÆLow
(about -114dBm)
1 ÆMedium
(about -100dBm)
2 ÆHigh
(about -70dBm)
0
R/W S257
CSMA mode
Under development
0 Ædisable 0
R/W S258
CSMA RSSI threshold
Under development
-130 Æ-75 -75

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Serial link management
R/W S210
Baudrate Serial link rate in bits/s ‘4’: 9 600
‘5’: 19 200
‘6’: 38 400
4
R/W S211
Data length ‘7’ : 7 bits ‘8’ : 8 bits
8
R/W S212
Parity ‘1’ : none ‘2’ : even
‘3’ : odd
1
R/W S213
Stop bits ‘1 ‘ : 1 stop bit ‘2 ‘ : 2 stop bit
1
R/W S214 Command time
out Time out duration for detecting the +++
pattern, unit in ms. From
3 up to 240ms
240
Miscellaneous
R/W S233 Transmited Call
Sign FCC ID (including letters from A to Z and numbers
from 0 to 9)
blank
R/W S234 Call sign
activation 0 Ædisable
1 Æenable
0
R/W S235 Serial Number The serial number is made
up of 11 digits:
yyyywwnnn.
Where :
yyyy : year
ww : week in the year
nnn : number in the
week
Unique for
each
product
R/W S236 Date of the last
configuration An available register to enter a date for customer
information composed of 8
00000000

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digits: yyyymmdd
Where:
yyyy : year
mm: month
dd: day
R/W S237 Owner An available register with
free format for customer
information
blank
R/W S260 Firmware
update Must always be left to 0 0 Æno upgrade
1 Æupgrade firmware
after next ATO command
0
The register value could be updated using the ATSn=m<cr> command and
displayed using ATSn?<cr> command.
The registers are shared in 2 types: read only (R) or read/write (R/W)

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Specifications
General technical characteristics
Supply voltage 10 to 28 Volts
Transmission consumption 15VA (under 4W)
Reception consumption 2VA
Operating temperature -30°C to +70 °C
Packaging IP65 Box with TNC female antenna connector
Range 50km with included antenna
Size / Weight 169x100x55 mm + antenna / 710g
Standard compliance EN300-113 / EN301-489 / EN60950
Radiofrequency
Programmable frequencies 400 to 470MHz (under licence)
Frequency stability ± 1kHz
Channel Spacing 12.5kHz – 25kHz on demand
Air rate 9600 bits/s
Transmitter
Modulation GMSK BT=0.5
Output power 0.5W (27dBm)
2W (30dBm)
4W (36dBm)
Software selectable
Output impedance 50 Ohms
Receiver
Sensitivity -115 dBm at 10-3 BER