radiometrix ltd., AFS2 data sheet page 1 features conforms to en 300 220-3 and en 301 489-3 custom variants from 420mhz to 470mhz on any 5mhz b and tx and rx path with <1db loss 500mw rf power ouput (for 100mw in) operation at +5v (regulated) low current consumption: 250ma transmit, <2ma recei ve 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 figure 1: AFS2-458 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. 500mw uhf rf power amplifier hartcran house, 231 kenton lane, harrow, middlesex, ha3 8rp, england tel: +44 (0) 20 8909 9595, fax: +44 (0) 20 8909 223 3, www.radiometrix.com issue 2, 30 july 2012 AFS2
radiometrix ltd., AFS2 data sheet page 2 user interface figure 3: AFS2 pin-out and dimension pin description 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 inpu t. when this line is asserted (low) the amplifier i s 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 lo w loss path is provided for the rx signals, from ae rial to the module. 3. if a low power transmit mode is needed, the rece ive path is bidirectional, and capable of carrying up to 100mw of power. in this case the radio must be s et 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, befo re 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 note s) 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 moun ted, and a low impedence power supply are required if full performance is to be reliably obta ined. if feasible, we recommend mounting the module, and the board it is on, inside a metal encl osure, with the rf cable taken to a bulkhead connector. all signal and power feeds should be fil tered and/or decoupled. failure to observe these measures can cause modulat ion distortion ('recirculation' effects) or instability. also be aware of the effect that the s trong rf fields generated by this device (and it's aerial) can have upon other adjacent circuitry if t his is not properly screened, filtered or otherwise protected. regulators, sensitive analogue circuitry , and microprocessors seem especially interference prone. pin name function rf 1 rf gnd rf ground 2 aerial rf connection to aerial (50 ) 3 rf gnd rf ground use r 1 vcc regulated +5v supply, at <250ma 2 0v supply ground 3 txe transmit mode enable (active low, 100k pullup to +5v) rf module 1 rf gnd rf ground 2 rf in/out rf connection to radio module 3 rf gnd rf ground
radiometrix ltd., AFS2 data sheet page 3 condensed specifications frequency 458mhz (standard) any 10mhz wide segment within 420-470mhz band transmitter 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) size 33 x 23 x 9 mm spurious radiations compliant with etsi en 300 220- 3 and en 301 489-3 interface user 3 pin 0.1" pitch molex rf module 3 pin 0.1" pitch molex rf 3 pin 0.1" pitch molex 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 individ ual customer requirements in the any 10mhz wide segment within 420-470mhz band.
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 co pyrighted 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 bel ieved 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 lt d does not assume any liability arising from the application or use of any product or circuit descri bed herein, nor for any infringements of patents or other rights of third parties which may result from the u se of its products. this data sheet neither states nor implies warranty of any kind, including fitness for any par ticular application. these radio devices may be sub ject to radio interference and may not function as intended if interference is present. we do not recommend th eir 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 th e directive, as appropriate to the particular equip ment. further details are available on the office of comm unications (ofcom) web site: http://www.ofcom.org.uk/radiocomms/ifi/ information requests ofcom riverside house 2a southwark bridge road london se1 9ha tel: +44 (0)845 456 3000 or 020 7981 3040 fax: +44 (0)20 7783 4033 information.requests@ofcom.org.uk european radiocommunications office (ero) peblingehus nansensgade 19 dk 1366 copenhagen tel. +45 33896300 fax +45 33896330 ero@ero.dk www.ero.dk
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