Nedap N V PAGSLS Remote Alarm Notification device User Manual MD Pager Transmitter v1 00

N. V. Nederlandsche Apparatenfabriek NEDAP Remote Alarm Notification device MD Pager Transmitter v1 00

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PAGSLS User Manual

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Date: 27 May 2004 Version 1.00 This information is furnished for guidance, and with no guarantee as to its accuracy or completeness; its publication conveys no license under any patent or other right, nor does the publisher assume liability for any consequence of its use; specifications and availability of goods mentioned in it are subject to change without notice; it is not to be reproduced in any way, in whole or in part, without the written consent of the publisher. _________________________________________________________________________________________________________ © Nedap Retail Support P.O. Box 102 NL-7140 AC Groenlo the Netherlands Metal Detection Pager - Transmitter

3 MD Pager - Transmitter V1.00 | Nedap Retail Support Technical Support: 2 Visitor’s address: 2 Postal address: 2 Fax 2 Table of content 3 General 4 Block diagram 5 Wireless Alarm Transmitter art. No. 8008272 5 Wireless Alarm Receiver art. No. 8008299 5 Transmitter Unit and PCB 6 RX Pager Unit and PCB 7 Datasheet TXM 433 Transmitter Module 8 Datasheet SILRX Receiver Module 19 Table of content

4 MD Pager - Transmitter V1.00 | Nedap Retail Support The Wireless Alarm unit is intended to transmit an alarm, OST or MD, to a small handheld receiver unit. The Transmitter unit is supplied with 24Vdc from the NCC or IQ or EQ unit. One of the alarm relays on the NCC , IQ or EQ unit is then wired tot the input of the transmitter board, for instance connector K3 between GND and input 1. A short pulse of a normally open contact is enough to trigger a short burst of data onto 433Mc. This data consists of an address and alarm number (1, 2, 3 or 4). In the handheld receiver this burst is detected and the alarm will sound in addition one of the led’s will light for a couple of seconds which indicates the alarm input that is triggered. If necessary an opto coupled input is also available on the transmitter. In this case 24V has to be supplied to the appropriate input. Both, the transmitter and the receiver are equipped with an address switch to its possible to use more than one transmitter receiver combinations in the same “shop”. The battery in the receiver has to be charged regularly, for this purpose the receiver has a battery charge input with charge led. While charging the pager does not function. The working range depends on the location of the transmitter and the total construction of the building. A range of 10 to 20 meters is practical and must give a sure alarm. General

5 MD Pager - Transmitter V1.00 | Nedap Retail Support Wireless Alarm Transmitter art. No. 8008272 pic16c84TX mod.TXM-433optocoupleroc inin4x 3,84MHz Either an opto coupled or a normal input is triggered and translated in a code by the pic. This code will be transmitted via a standard transmitter module on 433 MHz. Wireless Alarm Receiver art. No. 8008299 pic16c84RX mod.SILRX-4334x 3,84MHz A standard 433 MHz receiver module receives the alarm data and output it to a pic 16c84. The pic will read the code and will turn on the appropriate led and gives audible alarm. Block diagram

6 MD Pager - Transmitter V1.00 | Nedap Retail Support Transmitter Unit and PCB

7 MD Pager - Transmitter V1.00 | Nedap Retail Support RX Pager Unit and PCB

8 MD Pager - Transmitter V1.00 | Nedap Retail Support Datasheet TXM 433 Transmitter Module

Radiometrix Ltd, TXM Data Sheet page 1 Typical features include: CE Certified by independent Notified Body Verified to comply with harmonised radio standard ETSI EN 300 220-3 and EMC standard ETSI EN 301 489-3 by accredited Test Laboratory PCB Mounting, space saving SIL style SAW controlled wide band FM transmission High data rates, 5kbps and 10kbps versions Analogue or Digital data input Wide supply range 2.7V-4.0 or 6.0V-9.0V @ <17mA The transmitter modules are most commonly employed in Wireless Security systems. The transmitter and the matching receiver (RX2) are approved to harmonised radio standard ETSI EN 300 220-3 and EMC standard ETSI EN 301 489-3. The TXM and RX2 modules will suit one-to-one and multi-node wireless links in applications including car and building security, EPOS and inventory tracking, remote industrial process monitoring and computer networking. Because of their small size and low power requirements, both modules are ideal for use in portable, battery-powered applications such as hand-held terminals. Typical applications include :- Domestic and commercial security Guard patrol / lone worker protection Medical Alert / Nurse Call systems Mobile panic attack Computer networking Remote industrial process monitoring Data transfer through hazardous environments Lighting control, Garage door openers Fire alarms Picture / antique protection alarms Remote control, Access control The TXM-433-5 and TXM-433-10 integrate a low power FM UHF radio transmitter on a small module. Together with the matching RX2-433-14 or RX2-433-40 receiver a one-way radio data link can be achieved over a distance up to 200 metres on open ground. TXM-433-10 transmitter (back & front view) Radiometrix Hartcran House, Gibbs Couch, Watford, WD19 5EZ, England Issue 5, February 2002 TXM-433 UHF Radio Telemetry Transmit ModuleUHF Radio Telemetry Transmit ModuleUHF Radio Telemetry Transmit ModuleUHF Radio Telemetry Transmit Module Tel: +44 (0) 20 8428 1220, Fax: +44 (0) 20 8428 1221

Radiometrix Ltd, TXM Data Sheet page 2 Brief description The TXM is designed to work with the matching SILRX receiver. With the addition of simple antenna the pair may be used to transfer serial data up to 200m. The range of the radio link is very variable and depends upon many factors, principally, the type of antenna employed and the operating environment. The 200m quoted range is a reliable operating distance over open ground using 1/4 whip antenna at both ends of the link at 1.5m above ground. Smaller antenna, interference or obstacles (e.g. building etc.) will reduce the reliable working range (down to 30m in extreme cases). Increased antenna height, slow data or a larger receive antenna will increase the range (our best is 3km). Pin Description pin 1 RF GND This pin should be connected to the ground plane against which the integral antenna radiates. It is internally connected to pin 4. pin 2 RF OUT Connects to the integral antenna. Output impedance is 50Ω. pin 3 Vcc Positive supply , supply voltages from +6V to +9V may be used. pin 4 Vss 0V connection for the modulation and supply. pin 5 DATA IN Should be driven directly by a CMOS logic device running on the same supply voltage as the module. figure 1: TXM’s block diagram figure 2: mechanical dimensions

Radiometrix Ltd, TXM Data Sheet page 3 Performance data TXM-433-5 Absolute Maximum Ratings: Supply voltage Vcc pin 3 -0.7V to + 12V Modulation input pin 5 -0.7V to + 9V Operating temperature -10 °C to + 55 °C Storage temperature -40 °C to + 100 °C Performance Data: ambient temperature: 20°C supply voltage: +8.0V, unless noted otherwise test circuit: figure 3 Parameter Min Typical Max Units Notes Operating supply range (Vcc) 6.0 - 9.0 V - Supply current, Vcc = 6.0V 3.0 6.0 10.0 mA - Vcc = 9.0V 5.0 10.0 17.0 mA - Radiated power (ERP) Vcc = 6.0V -16 -10 -7 dBm 1 Vcc = 9.0V -13 -8 -5 dBm 1 Transmit frequency (Frf) 418.00 / 433.92 MHz - Initial frequency accuracy -80 - +80 kHz - Overall frequency accuracy -95 - +95 kHz 2 Spurious radiation Meets the EN300 220-1 standard 3 FM deviation (+/-) 15 25 40 kHz 4 Modulation Bandwidth (-3dB) analogue DC - 10 kHz 4 Modulation digital pulse width 100 - - µs 5 Notes 1. Module on 50mm square ground plane, helical antenna 2. Supply 6V to 9V, temp -10°C to +55°C. 3. <-54 dBm in bands 41-68, 87.5-118, 162-230 & 470-862 MHz <-36 dBm else where below 1GHz , <-30dBm above 1GHz 4. Standard modulation: 2kHz square wave, 0 to Vcc 5. High or Low pulse. figure 3: TXM 5kbps version test circuit

Radiometrix Ltd, TXM Data Sheet page 4 Performance data TXM-418-10 and TXM-433-10 Absolute Maximum Ratings: Supply voltage Vcc pin 3 -0.7 to + 6V Modulation input pin 5 -0.7 to + 13V Operating temperature -10°C to + 55°C Storage temperature -40°C to + 100°C Performance Data: ambient temperature: 20 °C supply voltage: 3.0V, unless noted otherwise test circuit: figure 4 Parameter Min Typical Max Units Notes Operating supply range (Vcc) 2.7 3.2 4 V - Supply current,Vcc = 2.7V 3.0 6.0 13.0 mA - Vcc = 4.0V 5.0 10.0 17.0 mA - Conducted power in to 50 Ω, Vcc = 2.7V - -5 - dBm 1 Vcc = 3.6V - 0 - dBm 1 Transmit frequency (Frf) 433.92 MHz - Initial frequency accuracy -85 0 +85 kHz - Overall frequency accuracy -95 0 +95 kHz 1 Spurious radiation 2 FM deviation (+/-) 15 25 40 kHz 3 Modulation Bandwidth (-3dB) analogue DC - 20 kHz 3 Modulation digital pulse width 50 - - µs 4 Notes 1. Supply 2V to 3.6V, temp -10°C to +55°C. 2. <-54 dBm in bands 41-68, 87.5-118, 162-230 & 470-862 MHz <-36 dBm else where below 1GHz , <-30dBm above 1GHz 3. Standard modulation: 2kHz square wave, 0 to Vcc 4. High or Low pulse.

Radiometrix Ltd, TXM Data Sheet page 5 The TXM-UHF transmitter requires only a data modulation input, supply, ground and an antenna. Power supply requirements • The module will operate over the range 6V to 9V and is typically powered by either 9 Volt 'PP3'. • The module is not reverse polarity protected. Reverse supply voltages higher than 2V will cause damage and must therefor be externally protected against. Modulation requirements • The TXM-UHF transmitter has a DC to 10kHz modulation bandwidth and will accept direct analogue (AFSK) or digital data. A modulation low-pass filter (10kHz @ -6dB, 1st order) is use internally. • Although the modulation bandwidth of the transmitter extends down to DC as does the AF output of the receivers, it is not possible to pass data with a DC component due to frequency errors & drifts between the transmitter and receiver. Frequency differences between the transmitter and receiver will produce a DC offset error which causes the data slicer in the receiver module to give errors on long high or low pulses which exceed the maximum pulse width, see the receiver's data sheet for more detailed information. figure 4: TXM 10kbps version test circuit figure 5: Typical performance curves

Radiometrix Ltd, TXM Data Sheet page 6 • Data Input, pin 5, is normally driven directly by CMOS logic levels from a data encoder IC. There is a wide range of encoder/decoder IC’s available which may be used with the modules: MM57C200, 57410 National Semiconductor UM3750 UMC HT12 series Holtek MC14026 Motorola AS2787 Austria Systeme International GmbH • The encoder normally being run on the same supply voltage as the transmitter. Analogue drive eg. 2 tone FSK, is also possible, the pk to pk level should be between 5V and 9V peak to peak and must not drive pin 5 below 0V. There will be some 2nd harmonic distortion due to the varactor modulator (typ. <15%), this may be reduced if necessary by predistortion of the analogue waveform Antenna requirements Three types of integral antenna are recommended and approved for use with the module: A) Helical: Wire coil, connected directly to pin 2, open circuit at other end. This antenna is very efficient given it's small size (20mm x 4mm dia.). The helical is a high Q antenna, trim the wire length or expand the coil for optimum results. The helical de-tunes badly with proximity to other conductive objects. B) Loop, A loop of PCB track tuned by a fixed or variable capacitor to ground at the 'hot' end and fed from pin 2 at a point 20% from the ground end. Loops have high immunity to proximity de-tuning. C) Whip This is a wire, rod ,PCB track or combination connected directly to pin 2 of the module. Optimum total length is 17cm (1/4 wave @ 418MHz) Keep he open circuit (hot) end well away from metal components to prevent serious de-tuning. Whips are ground plane sensitive and will benefit from internal 1/4 wave earthed radial(s) if the product is small and plastic cased Antenna selection chart A B C helical loop whip Ultimate performance ** * *** Easy of design set-up ** * *** Size *** ** * Immunity proximity effects ** *** * Range open ground to similar antenna 80m 50m 120m The antenna choice and position directly controls the system range. Keep it clear of other metal in the system, particularly the 'hot' end. The best position by far, is sticking out the top of the product. This is often not desirable for practical/ergonomic reasons thus a compromise may need to be reached. If an internal antenna must be used try to keep it away from other metal components, particularly large ones like transformers, batteries and PCB tracks/earth plane. The space around the antenna is as important as the antenna itself.

Radiometrix Ltd, TXM Data Sheet page 7 Duty Cycle requirements The duty cycle is defined as the ratio, expressed as a percentage, of the maximum transmitter “on” time on one or more carrier frequencies, relative to a one hour period. Where an acknowledgement message is required, the additional transmitter “on” time shall be included. There is a 10% duty cycle restriction on 433.050-434.790 MHz band in most of the EU member states. The TXM-433 is a RF module intended to be incorporated into a wide variety of applications and finished products, Radiometrix has no control over the end use of the TXM-433.The harmonised band 433.050 to 434.790 MHz as detailed in Annex 1 Band E of CEPT/ERC Recommendation 70-03 (which can be downloaded at http://www.ero.dk/scripts/docmanag98/dm.dll/QueryDoc?Cat=Recommendation) has list of countries where Duty Cycle restriction apply. Module users should, therefore, ensure that they comply with the stated Duty Cycle requirements of the version of CEPT/ERC Recommendation 70-03 in place at the time of incorporation of the TXM-433 into their product. It should be noted that the stated Duty Cycle must not be exceeded otherwise any approval granted for the TXM-433 will be invalidated. figure 6: Antenna configurations

Radiometrix Ltd, TXM Data Sheet page 8 Ordering information The following are standard: TXM-433-5 5kbps data rate Transmitter RX2-433-14-5V 14kbps data rate matching Receiver RX2-433-40-5V 40kbps data rate matching Receiver SILRX-433-5 5kbps data rate matching Receiver TXM-433-10 10kbps data rate Transmitter RX2-433-14-5V 14kbps data rate matching Receiver RX2-433-40-5V 40kbps data rate matching Receiver SILRX-433-10 10kbps data rate matching Receiver 3V versions of the RX2 receivers are available and should be ordered with a -3V suffix on the part number. (e.g. RX2-433-14-3V is set-up for 3V to 4V operation) All modules are available in a 418MHz version for UK use.

Radiometrix Ltd, TXM Data Sheet page 9 CE Certificate of TXM and its variants

Radiometrix Ltd Hartcran House, Gibbs Couch, Watford, WD19 5EZ, ENGLAND Tel: +44 (0)20 8428 1220, Fax: +44 (0)20 8428 1221 info@radiometrix.co.uk www.radiometrix.co.uk 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 Radiocommunications Agency (RA) web site: http://www.radio.gov.uk/topics/conformity/conform-index.htm The Library and Information Service The Radiocommunications Agency Wyndham House 189 Marsh Wall London United Kingdom E14 9SX Tel: +44 (0)20 7211 0502/0505 Fax: +44 (0)20 7211 0507 library@ra.gsi.gov.uk For further information on radio matters contact the Agency's 24 Hour Telephone Enquiry Point: +44 (0)20 7211 0211 European Radiocommunications Office (ERO) Midtermolen 1 DK 2100 Copenhagen Denmark Tel. +45 35250300 Fax +45 35250330 ero@ero.dk www.ero.dk

9 MD Pager - Transmitter V1.00 | Nedap Retail Support Datasheet SILRX Receiver Module

Radiometrix Ltd, SILRX-UHF Data Sheet page 1 Typical features include: • PCB mounting, space saving SIL style • 418 MHz SAW controlled wide band FM reception • Selective double conversion superhet • Sensitive typ. 0.5µV (-113 dBm) for 20 dB S/N • High data rates, 5kbps and 10kbps • Analogue and Digital data outputs • Carrier detect output • Fast enable time,< 3ms for duty cycle power save use • Wide supply range, 4.0V to 9.0V • Low current, 13 mA continuous, 130µA on power save (100:1) • The SILRX radio receiver and the matching DTI (RA) approved transmitter (TXM-418-5) are self contained, PCB mounting modules capable of transferring analogue or digital data up to a distance of 200m. The SILRX receiver module is particularly suitable for battery powered portable applications where it’s low power requirements and small size are of advantage. It may also be used as a lower cost option to the RXM-418-10 in fixed applications where the higher data rates and signal strength output of the RXM-418-10 are not required. Typical applications include:- Site paging receivers Paging car alarms Line powered telephone auto diallers Domestic and commercial security Guard patrol/lone worker protection Medical Alert/Nurse Call system Mobile panic attack Remote industrial process monitoring Battery powered half duplex data networks Data transfer through hazardous environments Lighting control, Garage door openers Fire alarms Picture/antique protection alarms Remote control, Access controlThe SILRX-418-5 and SILRX-433-5 integrate a complete FM superhet UHF radio receiver on a small module. Together with the matching TXM-418-5 or TXM-433-5 transmitter a one-way radio data link can be achieved over a distance upto 200 metres on open ground UK version: SILRX-418-5 / SILRX-418-10 Euro version: SILRX-433-5 / SILRX-433-10 left: TXM-418-5 transmitter right: SILRX-418-5 receiver Radiometrix Hartcran House, Gibbs Couch, Watford, WD19 5EZ, England Issue 3, 13 April 2001 SILRX-UHF UHF Radio Telemetry Receiver Module Tel: +44 (0) 20 8428 1220, Fax: +44 (0) 20 8428

Radiometrix Ltd, SILRX-UHF Data Sheet page 2 Brief description The SILRX receiver is a double conversion FM superhet with a data slicer driven by the AF output. Additionally a fast acting carrier detect signal is available to indicate to external circuits that a signal is present. This signal is extremely useful when implementing duty cycle power save circuits (see fig 4) or to indicate to external logic that a signal is being received. It is internally derived from the degree of noise quieting due to the presence of a receive carrier. The SILRX-418 is designed to work with the matching transmitter (TXM-418). With the addition of simple antenna the pair may be used to transfer serial data up to 200m. The range of the radio link is very variable and depends upon many factors, principally, the type of antenna employed and the operating environment. The 200m quoted range is a reliable operating distance over open ground using 1/4 whip antenna at both ends of the link at 1.5m above ground. Smaller antenna, interference or obstacles (e.g. building etc.) will reduce the reliable working range (down to 30m in extreme cases). Increased antenna height, slow data or a larger receive antenna will increase the range (our best is 3km). We recommend that the module evaluation kit, EVAL-418-A, can be used to assess the reliable working range under the anticipated conditions of use. The following figure shows the receiver’s block diagram.figure 1: Block diagram figure 2: Test cicuit

Radiometrix Ltd, SILRX-UHF Data Sheet page 3 Pin Description pin 1 RF IN The receiver antenna connects to this input. It has nominal RF impedance of 50Ω and is capacitively isolated from the internal circuit pin 2 RF GROUND This pin should be connected to any ground plane against which the antenna works. It is internally connected to pin 4. pin 3 DETECT This pin may be used to derive a carrier detect to enable external circuits when a signal is being received. If the detect function is not being used a 10 kΩ pull-up to pin 5 (Vcc) should be connected. Refer to applications note for further details on the use of this pin. pin 4 0 volt Ground for supply. pin 5 Vcc Positive supply of 4V to 9V 13 mA. The supply must be clean (<2mV pp) stable and free of high frequency digital noise. A supply filter is recommended unless the module is driven from it’s own regulated supply. pin 6 AF This is the FM demodulator output. It has an standing DC bias of approximately 1.4V and may be used to drive analogue data detectors such as modem chips or DTMF decoders. Load impedances as low as 2 kΩ and up to 100 pF can be driven pin 7 DATA This digital output from the internal data slicer is a squared version of the signal on pin 6 (AF) This signal is used to drive external digital decoders, it is true data (i.e. as fed to the transmitters data input). Load impedances as low as 1 kΩ and up to 1 nF can be driven .figure 3: Mechanical Dimensions:

Radiometrix Ltd, SILRX-UHF Data Sheet page 4 Performance data SILRX-418-5 and SILRX-433-5 ambient temperature: 20°C supply voltage: + 5 Volt test circuit: fig. 2 Parameter Min. Typical Max. Units Notes Operating voltage range (Vcc) pin 5 4.0 5.0 9.0 V - Supply current pin 5 11 14 17 mA - Receive frequency - 433.92 - MHz - Overall frequency accuracy - 100 0 + 100 kHz 1 Sensitivity for 20 dB S/N pin 1 - 0.5 1.0 µV 2 Carrier detect, threshold pin 1 - 0.5 2.0 µV - RF input impedance pin 1 - 50 - Ω - IF bandwidth - 250 - kHz 3 AF output level pin 6 - 500 - mVpp 2, 3 AF bandwidth pin 6 DC - 5 kHz 3 Frequency/voltage conversion pin 6 - 10 - mV/kHz - Data output, Logic low pin 7 0 0.2 0.8 V 4 Logic high pin 7 4.0 4.5 5 V 5 Data bit duration 0.2 - 20 ms 6 Data Mark:Space 20 % - 80 % 7 Data settling time pin 7 - - 15 ms 8 (minimum preamble duration) Enable time pin 3 - - 2.5 ms 3, 9 Signal detect time pin 3 - - 0.5 ms 3, 9 Notes: 1. over supply and temperature range 2. ±25kHz deviation, 1 kHz tone 3. 3µV input 4. 1mA sink 5. 1mA source 6. time between transitions 7. (time high / time low) * 100 %, averaged over any 20 ms period 8. time from valid carrier detect to stable data output 9. from application of supply to carrier detect low (active) 10. from application of signal to carrier detect low (active) Absolute maximum ratings: Supply voltage Vcc, pin 5 - 0.3 to + 10 V Operating temperature - 10°C to + 50°C Storage temperature - 40°C to + 100°C RF input, pin 1 0 dBm Any input or output pin - 0.3 to Vcc V, ±10 mA

Radiometrix Ltd, SILRX-UHF Data Sheet page 5 Performance data SILRX-418-10 and SILRX-433-10 ambient temperature: 20°C supply voltage: +5V test circuit: fig. 2 Parameter Min. Typical Max. Units Notes Operating voltage range (Vcc) pin 5 4.0 5.0 9.0 V - Supply current pin 5 11 14 17 mA - Receive frequency - 433.92 - MHz - Overall frequency accuracy - 100 0 + 100 kHz 1 Sensitivity for 20 dB S/N pin 1 - 1.0 2.0 µV 2 Carrier detect, threshold pin 1 - 2.0 4.0 µV - RF input impedance pin 1 - 50 - Ω - IF bandwidth - 250 - kHz 3 AF output level pin 6 - 500 - mVpp 2, 3 AF bandwidth pin 6 DC - 20 kHz 3 Frequency/voltage conversion pin 6 - 10 - mV/kHz - Data output, Logic low pin 7 0 0.2 0.8 V 4 Logic high pin 7 4.0 4.5 5 V 5 Data bit duration 0.05 - 2 ms 6 Data Mark:Space 20 % - 80 % 7 Data settling time pin 7 - - 5 ms 8 (minimum preamble duration) Enable time pin 3 - - 1 ms 3, 9 Signal detect time pin 3 - - 0.3 ms 3, 10 Notes: 1. over supply and temperature range 2. ±25 kHz deviation, 1 kHz tone 3. 3 µV input 4. 1mA sink 5. 1mA source 6. time between transitions 7. (time high / time low) * 100 %, averaged over any 20 ms period 8. time from valid carrier detect to stable data output 9. from application of supply to carrier detect low (active) 10. from application of signal to carrier detect low (active) Absolute maximum ratings: Supply voltage Vcc, pin 5 - 0.3 to + 10 V Operating temperature - 10°C to + 50°C Storage temperature - 40°C to + 100°C RF input, pin 1 0 dBm Any input or output pin - 0.3 to Vcc V, ±10 mA

Radiometrix Ltd, SILRX-UHF Data Sheet page 6 figure 4: Typical performance curves figure 5: Timing wave forms

Radiometrix Ltd, SILRX-UHF Data Sheet page 7 Antenna configurations The positioning of the antenna is of the up most importance and is one of the main factors in determining system range. The following notes should assist in obtaining optimum performance:- 1. Keep it clear of other metal in the system, particularly the ‘hot’ (top) end. 2. The best position by far, is sticking out the top of the product. This is often not desirable for practical/ergonomic reasons thus a compromise my need to be reached. 3. If an internal antenna must be used try to keep it away from other metal components, particularly large ones like transformers, batteries and PCB tracks/earth plane. The space around the antenna is as important as the antenna itself. 4. Keep it away from interference sources, bad interference can easily reduce system range by a factor of 5. High speed logic is one of the worst in this respect fast logic edges have harmonics which extend into the UHF band and the PCB tracks radiate these harmonics most efficiently. Single chip microprocessors and ground planed logic boards reduce this problem significantly. The next diagrams (fig 6) show three different antenna configurations which can be used on both the transmitter and the receiver. Additionally a coax fed external dipole or 1/4 wave ground plane antenna may be considered if system range is paramount. figure 6: Antenna configurations

Radiometrix Ltd, SILRX-UHF Data Sheet page 8 Module Mounting considerations 1. The module may be mounted vertically or bent horizontal to the motherboard. 2. No conductive items should be placed within 4 mm of the modules’ component side to prevent detuning. 3. Observe RF layout practice between the module and it’s antenna i.e. < 10 mm unscreened track, use 50Ω microstrip or coax for >10mm 4. It is desirable, but not essential, to earth plane all unused area around the module. 5. Mount as far as possible from high frequency interference sources, Microprocessors with external busses are totally incompatible with sensitive radio receivers and must be keep at least 1 metre from the receive antenna. Single chip micros are not a problem. 6. In some applications it is advantageous to remote the receiver and it’s antenna away from the main equipment. This avoids any interference problems and allows flexibility in the sighting of the receive antenna for optimum RF performance. Using the DETECT output Pin 3 of the module may be used in several ways:- 1. Pulled up to pin 5 (Vcc) with a 47 kΩ resistor unmutes the AF and DATA outputs for normal operation. 2. Pulled down to 0 Volts with a 47 kΩ mutes the AF and DATA Outputs (both go to 0V). 3. To drive the base of a PNP transistor (see fig 2) to derive a logic compatible carrier detect. The data detect output on pin 3 may be used for duty cycle power saving control in portable equipment where battery life is a problem. By pulsing the receiver on/off the average supply current may often be reduced by a factor of 20 or more depending upon the system requirements the data detect output is valid 1.5 ms (2.5 ms worst case) after application of the supply and is used to inhibit the power saving while data decoding is done. Internal data slicer A CMOS compatible data output is available on pin 7, this output is normally used to drive a digital decoder IC or a microprocessor which is performing the data decoding. The data slicer in the receive module is designed to accept data with a wide range of pulse widths and mark: space ratio’s, see specification table for limiting values. The data slicer has a 10 ms transient response time this is the settling time of the adaptive comparator, i.e. the first 10 ms of signal may be corrupt at the data output. System coding The transmit and receive modules have no internal digital coding/decoding thus allowing the flexibility to send many types of data. Encoder and decoder IC’s are required to give the system a high degree of protection from false triggers due to noise/interference/neighbouring systems and often for security reasons. There are wide range of suitable encoder/decoder IC’s which may be used with the modules, including :- MM57C200, MM57410,National Semiconductor UM3750, UMC HT12 series, Holtek MC145026 series, Motorola AS2787, Austria Mikro Systeme International GmbH Additionally IR. remote control, DTMF, Selcall and modem IC’s can be easily interfaced to the modules.

Radiometrix Ltd, SILRX-UHF Data Sheet page 9 AF output This output is the FM demodulator’s output after buffering and filtering. Since it is taken before the data slicer in the module, it may be used to drive external data slicers / demodulator’s in cases where the internal data slicer is not suitable. This is the case where an analogue subcarrier is being employed e.g. 2 tone AFSK or DTMF tones. In these cases the AF output is used to drive the FSK / DTMF decoder directly. The AF output is also a very useful test point for monitoring signals or interference. The AF output is DC coupled to the FM demodulator thus the DC level Varies with the frequency of the incoming signal. Supply requirements The module requires a clean supply. Noise and ‘hash’ in the 5 to 500 kHz band and 16 MHz ±1 MHz must be less than 2 mV, We recommend a 10 µF capacitor to ground on pin 5 (Vcc) and a 10Ω series feed resistor in cases where the cleanness of the supply is in doubt. . Additional Reading BS 0799 British standard for Wire-free intruder alarm systems BS 4737 British standard for intruder alarm systems in buildings from British standards institution - Tel. 44 171 629 900 MPT1340 DTI type approval specification for 418 MHz Telemetry from department of Trade and Industry - 44 171 211 0502/0505 ARRL Handbook Excellent radio engineering text ARRL Antenna Book Practical antenna design book Warning: Don’t be tempted to adjust the trimmer on the module, it controls the receive frequency and can only be correctly set-up with an accurate RF signal generator!

Radiometrix Ltd, SILRX-UHF Data Sheet page 10 Applications note Four Channel Receiver with battery saver Fig 7 shows a simple four channel paging receiver with 256 setable codes. The CMOS 555 timer provides a duty cycle power save circuit which latches ON when a signal is present. The values used in the example give 4ms ON; 400 ms OFF, i.e. 1:100 duty cycle. The total quiescent current is less than 200µA, thus a 9V alkaline battery (500 mA/hr) will give a life of over 2000 hours. The ON time is determined by the receiver’s power up settling time (3 ms worst case) + any tolerance of the duty cycle oscillator. The OFF time is controlled by R8 in the circuit and should be selected to suit the application depending upon the required response time and any limits imposed upon the duration of the transmission. It is recommended that the OFF time be no longer than 1/2 for the transmission preamble duration. Ordering information SAW based OEM Transmit and Receive modules. TXM-418-5 UK Transmitter on 418 MHz, Type approved to MPT1340 TXM-418-10 Fast transmitter on 418 MHz, Type approved to MPT1340 RXM-418-5 matching UK receiver module on 418 MHz SILRX-418-5 Low current UK receiver module on 418 MHz BiM-418-10 Bi-directional short range module on 418 MHz RPC-418-5 Self-contained module wich integrates the BiM transceiver with a Radio Packet Controller EVAL-418-A Evaluation kit for TXM & RXM EVAL-418-B SILRX supplementary PCB for EVAL-418-A BiM-KIT Evaluation kit for BiM-UHF modules. All modules are available in a 433.92 MHz version for use in other European countries. figure 7: Four Channel Receiver with power save

Radiometrix Ltd Hartcran House Gibbs Couch Watford WD19 5EZ ENGLAND Tel: +44 (0)20 8428 1220 Fax: +44 (0)20 8428 1221 info@radiometrix.co.uk www.radiometrix.co.uk 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 Radiocommunications Agency (RA) web site: http://www.radio.gov.uk/topics/conformity/conform-index.htm The Library and Information Service The Radiocommunications Agency Wyndham House 189 Marsh Wall London United Kingdom E14 9SX Tel: +44 (0)20 7211 0502/0505 Fax: +44 (0)20 7211 0507 library@ra.gsi.gov.uk For further information on radio matters contact the Agency's 24 Hour Telephone Enquiry Point: +44 (0)20 7211 0211 European Radiocommunications Office (ERO) Midtermolen 1 DK 2100 Copenhagen Denmark Tel. +45 35250300 Fax +45 35250330 ero@ero.dk www.ero.dk