RPM3-869-17-SMA [RADIOMETRIX]
UHF Radio Packet Modem; UHF无线分组调制解调器
| 型号： | RPM3-869-17-SMA |
| 厂家： | 
RADIOMETRIX LTD |
| 描述： | UHF Radio Packet Modem |
| 文件： | 总15页 (文件大小：737K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Radiometrix
Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England
Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233
16 May 2006
RPM3
UHF Radio Packet Modem
The UHF Radio Packet Modem (RPM3) is a low cost intelligent radio packet modem
that enables a two way radio network/link to be simply implemented between a
number of digital devices. The RPM3 uses addressable data packets with error
checking, packet acknowledgements and retransmissions to achieve a reliable
transparent wireless data link. Built for ease of use and rapid installation, the serial
interface ensures direct connection to microprocessors or to RS232 port via RS232
driver while remote configuration enables post installation setup of the modem.
Features
Addressable point-to-point
Point-to-Multipoint and broadcast modes
Inverted RS232 interface at 5V or 3VCMOS level
DTE speed 600-115200bps
Overall throughput:
17kbps with ACK
28kbps without ACK
Single 5V or 3V supply
Figure 1: RPM3-914-17
15mA during data streaming at maximum rate
Flow control – Hardware (CTS), None
Available in 869.85MHz (EU), 914.50MHz (North America)
Usable range up to 200m (650ft.)
No Duty Cycle Restriction
Built-in command line configuration
Built-in RF link diagnostics
Remote over-air unit configuration
Low operating current, Auto standby mode
Conforms to European ETSI EN 300 220-3 and EN 301 489-3
Conforms to FCC Part 15.249
Dimensions: 39mm X 23mm X 10mm
Applications
Telemetry and telecontrol
EPOS equipment, barcode scanners, belt clip printers, stock control, job allocation
Remote data acquisition system, data loggers
In-building, environmental monitoring and control systems
High-end security and alarm signalling
Automated Monitoring and Control Systems
Fleet management, vehicle data acquisition
Radiometrix Ltd.
UHF FM Radio Packet Modem
page 1
I
NTRODUCTION
The RPM3 is a self-contained Radio Packet Modem module that requires only a simple antenna, 5V
supply and a serial I/O port on a host microcontroller or PC.
The module provides all the RF circuits and processor intensive low level packet formatting and packet
recovery functions required to inter-connect any number of devices with serial port in a radio network.
A continuous stream of serial data downloaded by a Host microcontroller into the RPM3 serial receive
buffer is transmitted by the RPM3’S transceiver and will "appear" in the serial buffer of the addressed
RPM3 within radio range.
Figure 2: Point to point wireless link with RPM3 + Host microcontroller
1. FUNCTIONAL
DESCRIPTION
The RPM3 is a connection oriented modem module for sending and receiving serial data via an RF
communications link.
The RPM3 handles all necessary protocol related functions of validation and retries to ensure error free
and uninterrupted data is sent over the communications link. All data transfers between a pair of RPM
are fully acknowledged, thus preventing the loss of data. Bit coding and checksums are used on the data
packets to ensure the validity of the received data at the remote end.
S
Figure 3: RPM3 block diagram
Radiometrix Ltd.
UHF FM Radio Packet Modem
page 2
1.1 OPERATING STATES
The RADIO ACKET MODEM has three normal operating states:
P
•
•
•
S
S
C
HUTDOWN
TANDBY
ONNECTED
S
HUTDOWN
The SHUTDOWN state is entered by asserting the WAKE/DTR input pin high (Vcc). It effectively
forces the RPM3 into a suspended state. Communications cannot be made with the RPM3 in this
state. WAKE/DTR pin should be pulled Low by host or connected to 0V to Enable the RPM3.
S
TANDBY
Immediately after power up and during normal operation, the RPM3 will automatically enter
standby mode where it is waiting for a connection request from a remote RPM3 module.
While in this mode a remote connection request can be received which will place the RPM3 into a
connected state allowing it to then start receiving data from the remote unit. The connected host
device can also send data to the RPM3 via the serial interface which will force the module to send
a connection request to the remote RPM3 module, thus effectively setting up a logical connection
between two units and allowing data to be transferred.
C
ONNECTED
On receipt of a connection request from a remote unit, the RPM3 immediately enters a connected
state. This effectively allows the RPM3 modems to start sending and receiving data.
In-coming data is sent to the host via the serial port in the same form as it was given to the
remote RPM3 module.
Figure 4: RPM3 transmitting data at 28kbps during ZMODEM file transfer to a remote RPM3
Radiometrix Ltd.
UHF FM Radio Packet Modem
page 3
2 The Host Interface
2.1 SIGNALS
The connection to the RPM3 is a full duplex serial interface supporting baud rates from 600bps to
115200bps. Additional control signals are provided to assist in flow control, configuration and power
saving in the RPM3.
Figure 5: Physical dimensions and pinouts
Pin name Pin
Pin Function
RF signal ground
RF signal
In/Out
Description
BNC casing/coax braid connection
Antenna pin/coax core connection
RF GND
1, 3
RF
2
Input or
Output
Input
or Output
Input
or Output
Input
or Output
NC
RXSELCT
TX SELECT
TXD/AF
4
5
7
Receiver Select
Internal RF Receiver Enable to BiM3A
or RF Receiver Active Indicator
Internal RF Transmitter Enable to BiM3A
or RF Transmitter Active Indicator
Transmitted Packetised Data to BiM3A
Analogue Demodulated signal from BiM3A
Internal data line between RPM and FRPC
Internal data line between RPM and FRPC
Valid preamble indicator
Resets FRPC which also isolates BiM3A
RPM to FRPC download Request Acknowledge
Valid Data packet indicator
Transmitter Select
Transmitted Data
or demodulated signal
FRPC Data line
FRPC Data line
Preamble Detect
FRPC reset
Receive Acknowledge
Receive Request
Reset
D3
8
D2
9
NC
Output
NC
SIGNAL
RST
RXA
RXR
RESET
SETUP
10
11
12
13
14
15
NC
Output
Input
Input
Input
Input
Output
Output
Input
Input
-
Hardware reset of the RPM3
Enter Setup
Enter RPM3 configurator after a RESET
Wakes RPM3 when low, shuts down when high
Host (DTE) to RPM3 serial transmit data
RPM3 to host (DTE) serial received data
Hardware flow control of data from host (DTE)
Force the RPM3 serial interface to 9600bps
+5VDC or +3VDC regulated supply
WAKE/DTR 16
Wake or Shutdown
Serial transmitted data
Serial Received data
Clear To Send
Force 9600bps
Vcc Supply
TXD
17
RXD
18
CTS
19
DEFAULT
VCC
20
21
GND
6, 22
Ground
Supply Ground internally connected to GND
Notes: 1. RXD/TXD lines are true data
2. Active low SETUP, DEFAULT inputs require external 10kΩ pull-up to VCC.
3. Logic levels are 5V CMOS unless 3V variant is used.
4. WAKE pin should be pulled to ground if DTE cannot provide DTR signal
5. TXSELECT, RXSELECT, SIGNAL, RXR, CTS can be connected to LEDs via 1kΩ series resistors
2.2 RADIO
PACKET MODEM RESET
RESET
The Reset signal is internally pulled up to Vcc via a 10kΩ resistor. A reset aborts any transfers in
progress and restarts the RPM3.
HOST DRIVEN RESET
Minimum low time: 1.0 µs, after reset is released (returned high). The host should allow a delay
1ms after reset for the RPM3 to initialise itself.
Radiometrix Ltd.
UHF FM Radio Packet Modem
page 4
2.3 HOST
TO RADIO PACKET MODE DATA TRANSFER
Data is transferred between the RPM3 and the HOST using an asynchronous serial protocol. The default
protocol settings are 8 data bits, no parity and 1 stop bit (8n1). The baud rate setting for the serial
interface is user settable from 600bps to 115200bps.
TXD
Data from the connected host (DTE) is received by the RPM3 through TXD pin.
CTS
A single handshake line, CTS, controls the flow of data into the RPM3. The serial receive buffer of
the RPM3 is 96 bytes deep. The CTS will be asserted High (VCC) by the RPM3 when the receive
buffer hits approximately 66% full. It is advisable to limit the number of characters sent to the
RPM3 after the CTS control line is asserted. This will help to reduce the possibility of lost data
due to internal buffer overruns in the RPM3. The RPM3 will clear the CTS when the internal
serial receive buffer falls below 33% full.
RXD
Upon the RPM3 receiving data from a remote unit, the received data is sent to the connected host
(DTE) device through the RXD pin..
2.4 ENTERING
RADIO PACKET MODEM CONFIGURATOR
Configuring the RPM3 is accomplished by using a built-in command line configurator. The configurator
is entered by asserting the SETUP input of the RPM3 while resetting the RPM3.
S
ETUP
Holding SETUP low during a reset cycle will force the modem into the configurator. The state of
this input is checked while the RPM3 starts up from either power on or reset.
HOST DRIVEN SETUP
The Setup pin may either be driven by the host (recommended) to enable host controlled
configuration of the RPM3 or pulled up to VCC via a suitable pull-up resistor (10kΩ).
2.5 FORCING
DEFAULT SERIAL BAUD RATE
Asserting this pin low forces the RPM3 to start-up with a default baud rate of 9600bps, 8 data bits, one
stop and no parity.
DEFAULT
During a RESET the HOST must hold DEFAULT low to force the RPM3 serial interface to default to
9600bps. This is ideal if the serial baud rate has been forgotten or incorrectly set.
HOST DRIVEN DEFAULT
The DEFAULT pin may either be driven by the host (recommended) or pulled up to VCC via a
suitable pull-up resistor (10kΩ).
2.6 FORCING
RADIO PACKET MODEM INTO SLEEP MODE
Asserting the WAKE input high forces the modem into a low power sleep mode. This effectively shuts
down the RPM3 and prevents it from sending or receiving any data. It is a method for conserving power
when the modem is not required.
WAKE / DTR
During normal operation WAKE pin can be pulled high to force the RPM3 to shutdown into low
power sleep mode.
HOST DRIVEN WAKE
The WAKE pin may either be driven by the host (recommended) or pulled Low to 0V.
Radiometrix Ltd.
UHF FM Radio Packet Modem
page 5
TECHNICAL SPECIFICATION
General
Operating Voltage
Operating Current
ACKMODE ON
Transmitting
Receiving
5VDC or 3VDC
Average 15mA (Data streaming)
Average 15mA (Data streaming)
ACKMODE OFF
Transmitting
Receiving
Average 14mA (Data streaming)
Average 15mA (Data streaming)
4mA (Waiting for Connection)
70µA
Auto-Standby
Power-down
Standard Operating frequency
869.85MHz (EU)
914.50MHz (USA, Canada)
TX spectral bandwidth @ -40dBc
Operating Temperature
Configuring options
250kHz
-20ºC to +70ºC
Built-in command line configurator
Interface
Serial Interface
Serial Protocol
Inverted RS232 at 5V or 3V CMOS level
8 data/1 stop/no parity
Serial Signals
RXD, TXD, CTS, WAKE
Power down Control
Serial Handshaking
DTE Interface Speed
Via WAKE/DTR signal
Selectable as CTS signal or none
600/1200/2400/4800/9600/19200/38400/57600/115200 bps
Air Interface Speed
64kbps
Overall throughput – Acknowledged
17kbps (max)
3.6kbps (slots)
1.8kbps (slotsw)
– Unacknowledged 28kbps (max)
3.6kbps (slots)
1.8kbps (slotsw)
Receiver
Sensitivity
LO leakage (conducted)
-100dBm for 1ppm BER
-110dBm (max)
Transmitter
Output Power (typical)
+2dBm (EU version)
-1dBm (US version)
-40dBm max
Spurious Emissions
Note:
1.
RPM3 uses BiM3A (64kbps UHF Wide Band FM) transceiver for its RF interface. Please refer
to BiM3A data sheet for further details on the RF specification.
2.
BiM3A consumes 7mA on transmit and 11mA on receive
Radiometrix Ltd.
UHF FM Radio Packet Modem
page 6
3.0 RADIO
P
ACKET
HE
M
ODEM
CONFIGURATION
3.1 ENTERING
T
CONFIGURATOR
The RPM3 is configured by entering the built-in software configurator. Current argument can be
displayed by entering parameter / command without argument
3.2 USER
CONFIGURABLE PARAMETERS
C
ONFIG
Display a list of the current RPM3 configuration.
This will also set FLOW control to none to enable simple 3 wire serial communication
Valid range
None
DEFAULT
Set all RPM3 configuration settings to their factory default values.
Valid range
None
RESET
Exit the modem and force a software reset.
Any changed parameters will take effect after the modem has restarted.
When exiting the configurator, the HOST device must ensure the SETUP pin is high
otherwise the configurator will be re-entered after the reset.
None
Valid range
UNIT
Sets the unit number.
Two RPM3 modules can communicate with each other provided they have matching Unit
numbers and Site codes.
default
0
Valid range
0 to 15
S
ITE
Sets the Site address
The site number is used to distinguish between groups of operating modems. The site
code is an address extension to the unit number.
default
0
valid range
0 to 7
A
DDR
Updates the unit number value.
This command is used for changing the unit number in RAM without updating the unit
number stored in EEPROM. This enables the RPM3 to support point-to-multipoint
communications.
Upon using this command the configurator is exited and the modem operation is
resumed. The modem is not reset when the configurator is exited.
default
0
Valid range
0 to 15
B
AUD
Sets the host interface baud rate.
The changed baud rate will take effect after resetting the RPM3.
9600
default
valid range
600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200
T
HRUPUT
Sets the on-air data throughput.
Three possible settings are provided.
max: sets the maximum data throughput of the RPM3.
slots: effectively reduces the on-air throughput. This opens up ‘time slots’
allowing other RPM3 pairs, operating within close proximity, equal opportunity
to transmit data.
slotsw: increases the ‘time slots’ even further to allow more RPM3 pairs to
operate.
max
default
valid range
max, slots, slotsw
Radiometrix Ltd.
UHF FM Radio Packet Modem
page 7
FLOW
Sets the serial flow control between the host and RPM3.
Using no flow control enables the RPM3 to be used with a 3 wire serial link (TXD, RXD,
GND). Care must be taken in order to prevent overflowing the 96 byte serial receive
buffer in the RPM3.
Using hardware flow control enables the RPM3 to control the flow of serial data being
received.
none
default
valid range
hw, none
S
ERDLY
Sets the serial data receive to packet transmit delay.
When the RPM3 receives the first byte of data from the host, it starts a timer running.
Either a full buffer of data to send or a timeout of this timer will allow the packet to be
transmitted.
Fine tuning this delay for the baud rate the RPM3 is operating at can significantly
increase throughput while reducing unnecessary transmissions.
2 (x10ms)
default
valid range
2 to 255 (x10ms)
S
HDN
Sets the action of the WAKE input.
Setting shutdown to ON will cause the RPM3 to monitor the WAKE input. When WAKE is
taken high the RPM3 will be forced into low power sleep mode, thus reducing current
consumption. Subsequently lowering the WAKE input will bring the RPM3 out of low
power sleep mode.
SHDN should be set to OFF or WAKE pin should be pulled Low when the host (DTE)
cannot provide DTR control signal to wake RPM3 in a 3-wire serial interface.
default
On
valid range
on, off
RETRY
Sets the number of data retry attempts.
RF interference can cause a transmitted data packet to be lost or corrupt on reception. If
this happens the RPM3 will retransmit any unacknowledged transfer. The transmission
will be retried the specified number of times before the link to the remote unit is
considered ‘lost’ and the data purged.
default
5
valid range
1 to 63
S
TRTMSG
Enables the startup message.
The startup message is enabled by default, thus giving an immediate indication of the
operation of the RPM3. The message can be disabled prior to deployment of the RPM3
module.
On
default
valid range
on, off
A
CKMODE
Enables transfer acknowledgements.
This function enables packet transfer acknowledgements to be returned for every
outgoing packet. Packet acknowledgements aid in the delivery of error free and
consistent data transfers between a pair of modems. Disabling the acknowledgements
results in higher data throughput between modems, but does not protect against lost data
due to RF interference. It should be disabled while using RPM3 in a broadcast mode.
On
default
valid range
on, off
REMOTE
Enables remote configuration.
Over-air remote configuration of a RPM3 module is possible once it has been enabled.
The remote command is used to send remote configuration commands. See the following
chapter for a overview of remotely configuring a RPM3 module.
default
On
valid range
on, off
RADAR
Starts the radar test.
Used as a range or confidence test between RPM3 modules within the same site.
Unit number between 0 and 15.
parameter
Radiometrix Ltd.
UHF FM Radio Packet Modem
page 8
To configure the RPM3 the HyperTerminal should be set with the following settings.
Figure 6: Serial Port settings to use RPM3 Configurator
Hardware flow control should be disabled. Default baud rate of the RPM3 is 9600bps. However if the
default baud rate of the RPM3 is changed then the baud rate of the HyperTerminal should be matched or
DEFAULT pin should be pulled Low to force the RPM3 baud rate to 9600bps.
Figure 7: RPM3 configuration using HyperTerminal
User configurable parameters described in section 3.2 should be entered in the command prompt >
followed by Carriage Return (CR) key. Then SETUP should be pulled-up to VCC and RPM3 should be
RESET to exit the configurator and for the new parameters to be used by RPM3.
Radiometrix Ltd.
UHF FM Radio Packet Modem
page 9
4.0 EXTENDED
4.1 THROUGH
R
ADIO
PACKET MODEM FEATURES
P
UT
The RPM3 supports three rates, max (17kbps), slots (3.6kbps) and slotsw (1.8bps), of over-air throughput.
AX: When set to maximum and streaming data at the RPM3, the data is sent as quick as
M
possible. For host baud rates above 9600bps, data is transmitted continuously with minimal
delay between sequential packets. When this occurs, there is effectively no airtime for another
pair, operating in close proximity, to transmit without causing collisions. The maximum over-air
throughput that can be achieved is 17kbps with ACK and 28kbps without ACK..
Figure 8: RPM3 streaming data with ACK at maximum throughput
In Figure 8, RS232 serial data bytes accumulated in the receive buffer is transmitted as two 10kbps
bursts by transmitting RPM3 with gaps just enough to receive ACK from receiving RPM3.
Figure 9: RPM3 streaming data without gap for anotherRPM3 pair
For continuous data transmission at baud rates above 9600bps (with ACK) or 19200bps (without ACK),
hardware flow control should be used to prevent the host from causing receive buffer overrun errors.
RPM3 will signal CTS pin to stop/allow the host depending on its Receiver Buffer level.
Radiometrix Ltd.
UHF FM Radio Packet Modem
page 10
S
LOTS: Setting the throughput to SLOTS provides a method of opening about 85ms ‘time slots’ for other
RPM3 pairs operating in close proximity. The effective streaming on-air throughput between a pair of
RPM3 is effectively reduced to approximately 3.6kbps (with/without ACK).
Figure 10: RPM3 operating in slots throughput mode with ACK for each transmission
S
LOTSW: This setting effectively widens the SLOTS to about 185ms, reducing the over-air
throughput to approximately 1.8kbps (with/without ACK). It allows more RPM3 pairs to share
the same frequency. Host should obey CTS flow control signal from RPM3 when using SLOTS or
SLOTSW mode.
Figure 11: RPM3 operating in slotsw throughput mode
Overall throughput of the RPM3 is fixed according to thruput mode selected. Effective throughput will
vary according to the file transfer protocol used. ZMODEM is the most popular and fastest protocol but it
still adds its own header, CRC, link control bits to the data packet being transmitted reducing the actual
throughput.
Radiometrix Ltd.
UHF FM Radio Packet Modem
page 11
4.2 Remote Configuration
Remote configuration of a RPM3 module is possible using the REMOTE command from within the
configurator. The remote RPM3 unit should be on or in auto-standby mode.
Initially the REMOTE command is used to enable and disable the ability to remotely configure a module,
as described in section 3.2: User Configurable Command.
Once remote configuration is enabled the REMOTE command is then used to issue configuration
commands to a remote RPM3. The format for the remote command then becomes:
REMOTE
<SERIAL NUM> <COMMAND> <PARAMTER>
The <SERIAL NUMBER> of the remote RPM3 must be known in order for the remote configuration
request to be executed on the appropriate RPM3 module.
The <COMMAND> to be executed can be any of the following:
Baud 600,1200,2400,4800,9600,19200,38400,57600,115200
Unit 0 to 15
Site 0 to 7
Shdn on/off
Flow hw/none
Serdly 2 to 255
Retry 1 to 63
Strtmsg on/off
The <PARAMETER> is optional, and if not specified the setting for that command is returned and
displayed.
4.3 POINT-TO-MULTIPOINT
The RPM3 can be used for point-to-multipoint communications. One module must be considered to be the
master, which is used to address up to 15 remote units in any one site.
During normal operation, the base unit can be set to address another unit dynamically by entering the
configurator and using the ADDR command to change the unit address. Upon execution of this command,
provided the parameters are correct, the configurator is exited immediately. A period (‘.’) is sent to the
connected host device to indicate that the change has been registered and the RPM3 is now ready for
communications to the new unit address.
A
DDR is very similar to the Unit command, except that ADDR does not update the stored EEPROM unit
value. As the EEPROM has a limited number of write cycles, using ADDR for addressing multiple units in
a point to multipoint network is recommended. Also, the ADDR command will exit the configurator
immediately, which is required to resume communications very quickly.
4.4 BROADCAST
MULTIDROP
The RPM3 has a broadcast mutidrop mode which provides a mechanism for building a large networks.
This mode of operation is determined by the configuration command keyword ACKMODE being set to
OFF.
In broadcast mutidrop mode, the RPM3 does not implement network layer functionality related to data
packet routing, acknowledgement and retries. The connected host device should provide network layer
functionality.
The site code and unit address is still used by the radio modem when working in broadcast multidrop
mode. For a given multipoint network all radio modems within a group must contain the same site code
and unit address.
Radiometrix Ltd.
UHF FM Radio Packet Modem
page 12
4.5 RADAR: DIAGNOSTIC
TEST
Built into the configurator is a diagnostic test suitable for range testing and link confidence testing. The
Radar test effectively sends a small request packet to a remote unit then waits for a reply. The remote
unit must not be in the configurator otherwise it will not respond.
Upon receipt of a positive response from the remote unit, a success is recorded before the process is
repeated. This test will continue indefinitely until it is ended by a key press.
4.6 Radio Packet Modem Error Handling
The RPM3’s radio decoder module is deliberately non bit error tolerant, i.e. no attempt is made to repair
corrupt data bits. All of the redundancy in the code is directed towards error checking. For an FM radio
link using short packet lengths, packets are either 100% or so grossly corrupt as to be unrecoverable. By
the same reasoning, the Host is not informed or sent corrupt data since corrupt information is of little
value. The RPM3 implements packet acknowledges, timeouts and re-transmission to accomplish reliable
error handling.
Ordering information
Part number
Supply SMA
SMA
European: 869.85MHz
Connector Antenna
RPM3-869-17
RPM3-869-17-3V
5V
3V
RPM3-869-17-SMA
RPM3-869-17-3V-SMA
5V
3V
Yes
Yes
RPM3-869-17-ANT
RPM3-869-17-3V-ANT
5V
3V
Yes
Yes
Yes
Yes
Part number
Supply RPSMA
RPSMA
North American: 914.5MHz
Connector Antenna
RPM3-914-17
RPM3-914-17-3V
5V
3V
RPM3-914-17-RPS
RPM3-914-17-3V-RPS
5V
3V
Yes
Yes
RPM3-914-17-ANT
RPM3-914-17-3V-ANT
5V
3V
Yes
Yes
Yes
Yes
Notes:
1. Standard RPM3 module will be supplied with neither the connector nor antenna and RF pin (2).
2. If an SMA (or Reverse Polarity SMA) connector or 1/4 wavelength wire antenna is soldered on the
protruding PCB section for SMA connector, then the RF pin (2) should be cropped with side
cutters for better RF performance.
3. If the RF output is going to be taken from the RF pin (2) to on-board antenna or connector on the
host PCB (motherboard) via 50Ω microstrip, the protruding section of the RPM3 PCB can be cut
along the width of the RPM3 to remove the redundant connector section.
4. RPM3 is supplied with 7mm long pins which need to be trimmed to mount the module as close as
possible to the host PCB (motherboard). Ideally, the black coloured plastic spacer on the RPM3
pinheader should be touching (resting on) the host PCB.
5. North American version can also be supplied with SMA connector and antenna. However, only
the RSPMA antenna version is approved under FCC Part 15.249.
Radiometrix Ltd.
UHF FM Radio Packet Modem
page 13
Appendix A
Radiometrix Ltd.
UHF FM Radio Packet Modem
page 14
Radiometrix Ltd
Hartcran House
231 Kenton Lane
Harrow, Middlesex
HA3 8RP
ENGLAND
Tel: +44 (0) 20 8909 9595
Fax: +44 (0) 20 8909 2233
sales@radiometrix.com
www.radiometrix.com
Copyright notice
This product data sheet is the original work and copyrighted property of Radiometrix
Ltd. Reproduction in whole or in part must give clear acknowledgement to the
copyright owner.
Limitation of liability
The information furnished by Radiometrix Ltd is believed to be accurate and reliable.
Radiometrix Ltd reserves the right to make changes or improvements in the design,
specification or manufacture of its subassembly products without notice. Radiometrix
Ltd does not assume any liability arising from the application or use of any product or
circuit described herein, nor for any infringements of patents or other rights of third
parties which may result from the use of its products. This data sheet neither states nor
implies warranty of any kind, including fitness for any particular application. These
radio devices may be subject to radio interference and may not function as intended if
interference is present. We do NOT recommend their use for life critical applications.
The Intrastat commodity code for all our modules is: 8542 6000.
R&TTE Directive
After 7 April 2001 the manufacturer can only place finished product on the market under the
provisions of the R&TTE Directive. Equipment within the scope of the R&TTE Directive may
demonstrate compliance to the essential requirements specified in Article 3 of the Directive, as
appropriate to the particular equipment.
Further details are available on The Office of Communications (Ofcom) web site:
http://www.ofcom.org.uk/radiocomms/ifi/
Information Requests
Ofcom
European Radiocommunications Office (ERO)
Peblingehus
Riverside House
Nansensgade 19
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London SE1 9HA
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ero@ero.dk
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