BIM1H

EW N Radiometrix Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233 Issue 1, 01 November 2007 BiM1H VHF Narrow Band FM 500mW transceiver VHF The BiM1H transceiver modules offer a 500mW RF output VHF data link in Radiometrix transceiver standard pin-out and footprint. This makes the BiM1H ideally suited to those low power applications where existing wideband transceivers provide insufficient range. Features • • • • • • • Standard frequency 151.300MHz band Other frequencies from 120MHz to 180MHz Data rates of up to 3kbps for standard module Usable range over 10km Fully screened Feature-rich interface (RSSI, analogue and digital baseband) Low power requirements Figure 1: BiM1H-151.300-3 The BiM1H is a half duplex radio transceiver module for use in long range bi-directional data transfer applications at ranges up to 10kilometres. Applications • • • • • • • • • Tracing and asset tracking systems Meter reading systems Industrial telemetry and telecommand Data loggers In-building environmental monitoring and control Social alarms High-end security and fire alarms DGPS systems Vehicle data up/download Technical Summary • • • • • • • Size: 33 x 23 x 12mm Operating frequency: 151.300MHz Supply range: +5V regulated supply Current consumption: 290mA transmit, 8mA receive Data bit rate: 3kbps max. (standard module) RSSI output with >60dBm range -120dBm sensitivity (for 12 dB SINAD) Radiometrix Ltd., BiM1H transceiver data sheet Page 1 BiM1H transceiver contains a 500mW BiM1HT transmitter circuit and BiM1R receiver circuit with their RF output and input connected to a common RF pin via an internal RF switch. Radiometrix Ltd., BiM1H transceiver data sheet Figure 2: BiM1H block diagram Page 2 Functional description The transmit section of the BiM1H consists of a frequency modulated Voltage Controlled Crystal Oscillator (VCXO) feeding a frequency doubler with two stage amplifier and RF filter. Final Power Amplifier stage is factory pre-set to appropriate band power level. A Tx Select line controls the operation; the transmitter achieves full RF output typically within 8ms of this line being pulled low. The RF output is filtered to ensure compliance with the appropriate radio regulations and fed via a fast Tx/Rx changeover switch to the 50Ω antenna pin. The receive section is a double conversion FM superhet with IF at 21.4MHz and 455kHz fed by a Low Noise Amplifier (LNA) on the RF front-end. The receiver is controlled by RX Select line and will power up typically 1m separation). 2. The end-fed half wave is the same length as the dipole but consists of a single rod or whip fed at the bottom via a matching network. Mounting options are similar to those for the quarter-wave whip. A ground plane is sometimes used but is not essential. The end-fed arrangement is often preferred over the centre-fed dipole because it is easier to mount in the clear and above surrounding obstructions. Yagi. This antenna consists of two or more elements mounted parallel to each other on a central boom. It is directional and exhibits gain but tends to be large and unwieldy – for these reasons the yagi is the ideal choice for links over fixed paths where maximum range is desired. Radiometrix Ltd., BiM1H transceiver data sheet Page 9 Module mounting considerations Good RF layout practice should be observed. If the connection between module and antenna is more than about 20mm long use 50Ω microstrip line or coax or a combination of both. It is desirable (but not essential) to fill all unused PCB area around the module with ground plane. Variants and ordering information The BiM1H transceiver is manufactured in the following variants as standard: Standard: BiM1H-151.300-3 BiM1H-151.300-3 BiM1H-151.300-10 (10kbps) BiM1H-151.300-10 (10kbps) Special: Other variants can be supplied to individual customer requirements at frequencies from 120MHz to 180MHz and/or opitomized for specific data speeds and formats. However these are subject to minimum order quantity (MOQ) and long lead time. Please consult the Sales Department for further information. Radiometrix Ltd., BiM1H transceiver data sheet Page 10 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 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