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AFS2

器件型号:AFS2
文件大小:4374.52KB,共0页
厂商名称:RADIOMETRIX [Radiometrix Ltd]
厂商官网:http://www.radiometrix.com
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器件描述

AFS2器件文档内容

Hartcran House, 231 Kenton Lane, Harrow, Middlesex, HA3 8RP, England
Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233, www.radiometrix.com

AFS2                                                             Issue 2, 30 July 2012
500mW UHF RF power amplifier

AFS2 amplifier module is intended to
increase the transmitted power of a
Radiometrix multi channel TR2M transceiver
module. It provides transmit and receive
paths, and can be simply 'dropped into' the
aerial connection. The AFS2 may be usable
with other 100mW output devices, but no
guarantees can be offered.

Features                                                                   Figure 1: AFS2-458

          Conforms to EN 300 220-3 and EN 301 489-3
          Custom variants from 420MHz to 470MHz on any 5MHz band
          TX and RX path with <1dB loss
          500mW RF power ouput (for 100mW in)
          Operation at +5V (regulated)
          Low current consumption: 250mA transmit, <2mA receive
          Fully screened
          Small Size: 33 x 23 x 9mm

Applications

          Handheld terminals
          EPOS and inventory tracking
          Data loggers
          Industrial telemetry and telecommand
          In-building environmental monitoring and control
          High-end security and fire alarms

Figure 2: AFS2 block diagram  AFS2 data sheet                              Page 1

Radiometrix Ltd.,
User interface

Figure 3: AFS2 pin-out and dimension

Pin description

Pin                Name       Function

RF                 RF GND     RF Ground
1                  Aerial     RF connection to aerial (50 )
2                  RF GND     RF Ground

3                  Vcc        Regulated +5v supply, at <250mA
User               0V         Supply Ground
1                  TXE        Transmit mode enable (active low, 100K pullup to +5v)
2
3                  RF GND     RF Ground
RF Module          RF in/out  RF connection to radio module
1                  RF GND     RF Ground
2
3

NOTES:
     1. This amplifier expects a 100mW power level to be output from the radio on transmit.
     2. The TXE line should be tied to the TR2M TXE input. When this line is asserted (low) the amplifier is
          turned on (drawing 280-300mA) and the RF switching connects it between the module and the
          aerial. When it is inactive (high or floating) a low loss path is provided for the rx signals, from aerial
          to the module.
     3. If a low power transmit mode is needed, the receive path is bidirectional, and capable of carrying up
          to 100mW of power. In this case the radio must be set to transmit, but the AFS2 pin TXE must be left
          in the inactive (high) state.
     4. Following the return of TXE to inactive (high), the AFS2 remains in transmit mode for another 15mS,
          to allow the output of the radio to ramp down, before changing over to receive mode.
     5. This unit requires a regulated +5v rail, during transmit, and during receive.
     6. This version cannot be used with in i1200 modem mode, unless a separate means of driving the
          TXE pin is provided. (see relevant application notes)
     7. This is a 500mW output product. Good grounding (mount onto a groundplane and tack solder all can
          walls to this), good quality aerials, properly mounted, and a low impedence power supply are
          required if full performance is to be reliably obtained. If feasible, we recommend mounting the
          module, and the board it is on, inside a metal enclosure, with the RF cable taken to a bulkhead
          connector. All signal and power feeds should be filtered and/or decoupled.
          Failure to observe these measures can cause modulation distortion ('recirculation' effects) or
          instability. Also be aware of the effect that the strong RF fields generated by this device (and it's
          aerial) can have upon other adjacent circuitry if this is not properly screened, filtered or otherwise
          protected. Regulators, sensitive analogue circuitry, and microprocessors seem especially
          interference prone.

Radiometrix Ltd.,                     AFS2 data sheet                                Page 2
Condensed specifications

Frequency                        458MHz (standard)
Transmitter                      Any 10MHz wide segment within 420-470MHz band

                   Output power  500mW +/- 1dB (250mW by special order)
                   TX hold time  15mS after TXE goes high
                   TX spurii     <-40dBm

Receive path loss                <1dB (bi directional)

Supply               voltage     +5V regulated
                     Current     250mA transmit
                                 <2mA receive (TXE high or floating)
Operating temperature            -20 to +70 C (Storage -30 to +70 C)
                                 33 x 23 x 9 mm
Size                             Compliant with ETSI EN 300 220-3 and EN 301 489-3
                                 3 pin 0.1" pitch molex
Spurious radiations              3 pin 0.1" pitch molex
                                 3 pin 0.1" pitch molex
Interface          User

                   RF Module

                   RF

Variants and ordering information

AFS2 is manufactured in the 458MHz as standard:

                     AFS2-458

Matching Transceiver:

                     TR2M-458-5-A (100mW, with TXE wire for modem operation)
                     TR2M-436.5-10-ARS (435MHz -438MHz Amateur Radio Satellite band Uplink usage)

Matching Transmitters
                     LMT2-458-10 (100mW)
                     TX2M-458-5 (100mW)

Other frequency variants can be supplied to individual customer requirements in the Any 10MHz
wide segment within 420-470MHz band.

Radiometrix Ltd.,                AFS2 data sheet                                    Page 3
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                       European Radiocommunications Office (ERO)
Ofcom                                      Peblingehus
Riverside House                            Nansensgade 19
2a Southwark Bridge Road                   DK 1366 Copenhagen
London SE1 9HA                             Tel. +45 33896300
Tel: +44 (0)845 456 3000 or 020 7981 3040  Fax +45 33896330
Fax: +44 (0)20 7783 4033                   ero@ero.dk
information.requests@ofcom.org.uk          www.ero.dk
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