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| EW N Issue 3, 27 April 2007 Radiometrix Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233 TR2M/TR2I MultiNarrow Band FM Multi-channel UHF Transceiver The TR2M transceiver module offers a low power, reliable data link in an industry-standard pin out and footprint. This makes the TR2M ideally suited to those low power applications where existing wideband modules have insufficient range, or where multi-channel operation is needed. Two versions are available, covering the 458.5-459.1MHz UK band (at 100mW) and the European 433.05-434.79MHz band (at 10mW). Features Figure 1: TR2I-458-5 transceiver 433MHz version conforms to EN 300 220-3 and EN 301 489-3 458MHz version to MPT 1329 (UK specs). Any 5MHz band module from 420MHz to 480MHz available as factory tuned custom variant High performance double superhet, 128 channel PLL Synthesizer with TCXO Data rates up to 5 kbps for standard module Usable range over 1km (with 100mW variant) Fully screened Feature-rich interface (RSSI, automatic noise squelch, analogue and digital baseband) Incorporates a 1200baud dumb modem User configurable via RS232 interface Low power requirements Applications Handheld terminals Heavy vehicle/machine remote controls EPOS equipment, barcode scanners Data loggers Industrial telemetry and telecommand In-building environmental monitoring and control High-end security and fire alarms Vehicle data up/download Technical Summary Size: 59 x 38 x 10mm Operating frequency: 458.5-459.1MHz or 433.05-434.79MHz Custom variants from 420MHz to 480MHz on any 5MHz band 23 channels in 458MHz band, 69 channels in 433MHz band (128 channels max.) Transmit power: +20dBm (100mW) nominal Supply range: 4.5V - 16V Current consumption: 110mA transmit, 27mA receive Data bit rate: 5kbps max. (standard module) Receiver sensitivity: -118dBm (for 12 dB SINAD) Radiometrix Ltd TR2M Data Sheet page 1 Radiometrix Ltd TR2M Data Sheet Figure 2: TR2M block diagram page 2 A: A: B: B: B: C: C: C: C: C: C: C: C: C: C: C: C: C: 1 Vcc 2 Gnd 1 RF Gnd 2 RF in 3 RF Gnd 1 TXE (MOD TX_ON) 2 TXD (MOD NC) 3 AF in (MOD NC) 4 RSSI 5 SQF (MOD NC) 6 AF out 7 RXD (MOD NC) 8 +4.4V out 9 0V 10 PGM 11 P1 (MOD TXD) 12 P2 (MOD RXD) 13 P3 (MOD NC) 59mm 3.1mm 2.7mm A 8.9 mm Squelch adj. 38.5mm 33mm 1 Input gain. B 1 53.3mm C Unit height 10mm Figure 3: TR2M Footprint (Top) Pin Description - TR2M Pins A1 A2 B1 B2 B3 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 Name Vcc GND RF GND RF RF GND TXE (MOD TX_ON) TXD (MOD NC) AF in (MOD NC) RSSI SQF (MOD NC) AF out RXD (MOD NC) +4.4V out 0V PGM P1 (MOD TXD) P2 (MOD RXD) P3 (MOD NC) Function 4.5V-16V Ground RF ground To the antenna RF ground Transmitter Enable. Low = ON, Open = RX mode. Internal 10k pull-up to 4V DC coupled digital data input for 3-12V CMOS logic. Leave open if unused AC coupled Analogue Input Limit to 1Vpk-pk 10% to keep distortion <1.5% and peak deviation >2.5kHz DC level between 0.5V and 2.5V. 60dB dynamic range Noise operated carrier detect. Open collector. ON/low = no signal 200mVpk-pk audio. DC coupled, approx 1V bias. Muted by squelch Open collector output of data slicer suitable for Biphase codes Regulated DC supply. 75mA max. drain. Present if unit is powered Ground Serial programming/configuration input at RS232 level Parallel frequency select inputs. Inverted logic, internal 10k pullups to 4V Notes: 1. TR2M receiver section inverts the sense of the baseband stream, so a logical inversion is present between input of TX and output of RX. A version is available (TR2I) which inverts the transmit datastream as well (resulting in no net inversions between a pair of TR2I radios). 2. Carrier detect on TR2M mutes the AF Out and RXD outputs. It can be factory disabled. 3. All the open collector outputs must be connected to Vcc/+4.4V out via a pull-up resistor. 4. The software incorporates a 1200baud dumb modem, compatible with that implemented in TX2M, RX2M radios (I1200 tones and format) 5. With 1200baud modem mode enabled, parallel selection of channel is unavailable as the P1-P3 lines are used for modem input/output operations. 6. PGM and MOD TXD (pin 10 and 11) tolerate true RS232 levels. No buffering is required. Radiometrix Ltd TR2M Data Sheet page 3 TXE (MOD TX_ON) (C1) TXD (MOD NC) (C2) AF in (MOD NC) (C3) RSSI (C4) Transmit Enable ADC 1k Carrier Detect Data In 10k 100nF VDD Parallel Channel Select TR2M-433-5 AF out (C6) RXD (MOD NC) (C7) +4.4V out (C8) GND (C9) PGM (C10) P1 (MOD TXD) (C11) P2 (MOD RXD) (C12) P3 (MOD NC) (13) 6 7 8 9 2 3 4 5 TXD SGD Figure 4: TR2M interfaced to host microcontroller and serial port for configuration TR2M can be directly interfaced to a host microcontroller which can generally be powered by the regulated +4.4V output on pin 8 of TR2M. Three I/O pins on the microcontroller port can be assigned to select the first 8 channels on frequency table of the appropriate band for which the module is configured by pulling the P1-P3 pins low. Channel select pins of TR2M have internal pull-up to 4V supply rail, hence channel selection operate on inverted logic. Channel 0 1 2 3 4 5 6 7 P3:P2:P1 111 110 101 100 011 010 001 000 433MHz band 433.050 433.075 433.100 433.125 433.150 433.175 433.200 433.225 458MHz band 458.525 458.550 458.575 458.600 458.625 458.650 458.675 458.700 Digital Received Data Output (RXD) pin is an open collector output, which should be pulled-up to required voltage swing level (e.g. +4.4V or Vcc). TR2M has an automatic noise squelching function which is activated when there is not any RF signal at detectable level on the channel or if the non-coherent noise like interference level is high enough to block any weak RF signal from being received. SQF is provided as an open-collector output for monitoring which should be pulled-up to required voltage swing level. SQF output will jump to pull-up voltage level if received RF signal level at the RF In/Out pin of the module is about 3dB below the level required to produce 12dB SINAD level on demodulated AF Output signal. SQF pin can be connected to an LED to act as a Carrier Detect indicator. Pull-up resistor value should be reduced (e.g. 1k) according to the current requirement to produce satisfactory brightness on the LED used. TR2M can be configured using any PC/Laptop/PDA having a serial port and modem/terminal program. TXD (pin 3) of DB9M connector can be directly wired to PGM (pin C10) of the TR2M and SGN (pin 5) of DB9M connector should be either connected to common ground or pin C9 of the TR2M. The whole frequency/channel table is user reconfigurable to 128 channels within 5MHz band of supplied frequency subject to regulatory band limits. Serial Channel Selection via PGM pin gives access to the whole of regulatory band allocation for 433.05MHz-434.790MHz (69 channels) or 458.525MHz458.925MHz (23 channels). Radiometrix Ltd TR2M Data Sheet PC serial port SQF (MOD NC) (C5) Host Microcontroller Data Out 1 page 4 Received Signal Strength 2.5 2.3 2.1 1.9 RSSI output (V) 1.7 1.5 1.3 1.1 0.9 0.7 0.5 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 RF Level (dBm) Figure 5: RSSI voltage variation with respect to RF level at TR2M If the microcontroller has a built-in Analogue to Digital Converter (ADC), the Received Signal Strength Indicator (RSSI) output voltage level can be read by the microcontroller to estimate its distance from transmitting TR2M unit or identify areas of weak signal reception. RSSI can also be used to make a decision to switch to the second antenna in fixed installations within building where the probability of null-spots are higher. Regulatory Restrictions There is a generic 10% duty cycle restriction on the 433MHz ISM band through out European countries with few exceptions. Annex 1 Band E, Band E2 of European Radio Communications Committee (ERC) Recommendation 70-03 dated February 2004 specifies the following: 433.050MHz (Ch0) 434.050MHz (Ch40) 10mW ERP, 10% duty cycle for Channelised Narrow Band and Wide Band usage 10mW ERP, 100% duty cycle for <25kHz Channelised Narrow Band usage 433.05MHz 434.040MHz 434.79MHz 433.775MHz (Ch69) 433.050-434.790 MHz, Non Specific Short Range Device, band is primarily intended for Telemetry, Telecommand, Alarms, Data in general and other similar applications. Audio and Voice signals should be avoided in the band. Radiometrix Ltd TR2M Data Sheet page 5 TR2M serial configuration commands 2400 baud RS232. 8 bit data, no parity, 1 start bit, 1 or 2 stop bits, No flow control Set value of N for single channel operation Serial select of channel xx (0 to 127) Set highest permitted (serial selected) channel xx (others default to ch0) Set value of N for channel aa (channels 0 to 15) Set value of N for channel 16 (channels 17 to 127 then in sequence) Enter value for R register Channel selected by 3 bit parallel input (0 to 7). Disable modem Channel selected by most recent 'gochan' operation Enable internal modem. Frequency selected by most recent 'gochan' or 'single' GOTEST 250Hz test tone transmission N TX = f RF f Channelspacing = 433.050 MHz = 17322 25kHz N value for TX /LOAD00 17322 /LOAD01 17323 /LOAD02 17324 /LOAD03 17325 /LOAD04 17326 /LOAD05 17327 /LOAD06 17328 /LOAD07 17329 /LOAD08 17330 /LOAD09 17331 /LOAD10 17332 /LOAD11 17333 /LOAD12 17334 /LOAD13 17335 /LOAD14 17336 /LOAD15 17337 /LOADTB 17338 /LOADMX 69 25kHz R= fTCXO f channelspacing = 13MHz , So R=520 25kHz N value for TX /LOAD00 18341 /LOAD01 18342 /LOAD02 18343 /LOAD03 18344 /LOAD04 18345 /LOAD05 18346 /LOAD06 18347 /LOAD07 18348 /LOAD08 18349 /LOAD09 18350 /LOAD10 18351 /LOAD11 18352 /LOAD12 18353 /LOAD13 18354 /LOAD14 18355 /LOAD15 18356 /LOADTB 18357 /LOADMX 23 Channel Number 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 F max 433MHz band 433.050 433.075 433.100 433.125 433.150 433.175 433.200 433.225 433.250 433.275 433.300 433.325 433.350 433.375 433.400 433.425 433.450 434.775 458MHz band 458.525 458.550 458.575 458.600 458.625 458.650 458.675 458.700 458.725 458.750 458.775 458.800 458.825 458.850 458.875 458.900 458.925 459.100 433.05 434.79 433MHz Band 458MHz Band 459.1 461.675 Figure 6: Maximum regulatory and user accessible sequential channels Radiometrix Ltd TR2M Data Sheet page 6 Go to Ch69 (434.775MHz) highest channel on 433MHz band Go to Channel 70 will wrap back to Channel 0 (433.05MHz) Increase maximum allowed Channel to 89 (435.275MHz) Serially select Channel 6 (433.200MHz) Enable Parallel Channel Selection using P1:P2:P3 Go to Channel 88 (435.250MHz) outside legal 433MHz band Go to new highest Channel 89 (435.275MHz) Set legal highest Channel as 69 (434.775MHz) below 434.790MHz Go to Channel Selected by P1:P2:P3 Set Synthesiser N value to 17332 to operate on 433.300MHz Return to Parallel Frequency Selection Change Channel 3 N value to 17338 to operate on 433.450MHz) Serially select newly set Channel 3 frequency of 433.450MHz Set the Ch3 back to factory set N value 17325 (433.125MHz) Modulate with 250Hz test tone to visualise peak FM deviation Return to Parallel Frequency Selection will not work Module should be power-reset to exit GOTEST command Go to last Serially Selected Channel 3 (433.125MHz) Change Synth. R value to 1300 to get multiple of 10kHz spacing which allows Ch0 N value to be changed to 43403 (434.030MHz) Go to newly set Ch0 (434.030MHz) if none of P1-P3 are pulled low Change Ch1 N to 43410 (434.100MHz) with non-uniform spacing Select newly set Ch1 (434.100MHz) if only P1 is pulled low Serially select newly set Channel 1 (434.100MHz) Change R value to factory set 25kHz channel spacing Change Channel 0 N value to factory set 17322 (433.050MHz) Change Channel 0 N value to factory set 17323 (433.075MHz) Go to factory set Channel 0 frequency of 433.050MHz Go to factory set Ch0 or Ch1 Change frequency to descending order with Ch0=434.775MHz with Ch1=434.750MHz to use at 100% duty cycle Serially select newly set Ch1 frequency of 434.750MHz Enable 1200 baud Modem. (Disables Parallel Channel Selection) Notes: 1. A pause of at least 50ms must be allowed between command strings (EEPROM programming time) SINGLE mode does not store the N value in EEPROM. Therefore the unit is inoperative after a power down until either another valid SINGLE command is received, or mode is changed by a GOCHAN, SETPAR or SETSER command. SINGLE mode is intended for frequency agile applications. 2. /SETPAR command should be issued at the end of channel programming to put the module back into parallel frequency select mode 3. In 458MHz band, channel 12 (458.825MHz) and channel 15 (458.900MHz) are allocated specifically for fixed alarm and radio keys/vehicle paging applications respectively and should not be used for general purpose applications. 4. User can modify the frequency table of 128 channels to any desired frequency by changing N, R values of synthesizer within 2.5MHz of factory set Channel 0 frequency subject to the Radio Regulatory Band Allocation in the country of intended use. 5. All other frequency, power, analogue input gain and automatic noise squelching adjustment will be treated as custom variants of the module to be set by factory. Radiometrix Ltd TR2M Data Sheet page 7 Pin description of TR2M with Modem mode selected The 'modem' mentioned is a 1200 baud RS232 semi-intelligent unit (Transmit keyed when valid serial data is present, so no separate TX control needed. Coding in the datastream also permits the receiver to ignore noise and only output valid serial data). This is a half duplex unit, so collisions between transmitted and received packets must be dealt with by the user. Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 Name MOD TX_ON MOD NC MOD NC RSSI MOD NC AF out NC +4.4V out 0V PGM MOD TXD MOD RXD MOD NC Function Open = normal modem operation. Low = constant TX (for test). 10k pullup to 4V Leave open Leave open DC level between 0.5V and 2.5V. 60dB dynamic range Leave open Modem tones or noise present Leave open Regulated DC supply. 75mA max. drain. Present if unit is powered Ground Serial programming/configuration input at RS232 level RS232 data input (true). 10k pullup to 4V Inverted RS232 data out (to inverting buffer like MAX232) Leave open TR2Ms on both ends should be configured to required operating frequency using GOCHAN command before starting to use the internal 1200 baud modem, because the P1-P3 pins will be used as Modem Data pins and the modem will operate on the last serially selected channel after SETMOD command is used to enable the Modem. TXE (MOD TX_ON) (C1) TXD (MOD NC) (C2) AF in (MOD NC) (C3) RSSI (C4) TR2M-433-5 SQF (MOD NC) (C5) AF out (C6) RXD (MOD NC) (C7) +4.4V out (C8) GND (C9) PGM (C10) P1 (MOD TXD) (C11) P2 (MOD RXD) (C12) P3 (MOD NC) (13) SW1 VDD Serial COM Port 6 7 8 9 1 2 3 4 5 SGD RXD TXD RS232 driver Figure 7: TR2M interfaced to PC serial port in modem mode Note: Baud rate used for Modem is half that of used for serial configuration. Attached RS232 devices should be set with the following: 1200bps, 8 Data bits, No Parity, 1/2 stop bits, no flow control TXD (Pin 3) of a Serial Port can be switched from PGM (Pin C10) to MOD TXD (Pin C11) with no RS232 driver in between. However, MOD RXD (Pin C12) requires an RS232 line driver before it can be connected to RXD (pin 2) of a serial port. Some of the RS232 line drivers can be powered from the regulated +4.4V out (Pin C8). Radiometrix Ltd TR2M Data Sheet page 8 Condensed specifications Frequency Frequency stability Channel spacing Number of channels 458.5-459.1MHz or 433-434MHz (any 5MHz band from 420-480MHz) +/- 1.5kHz 25kHz (12.5kHz by special order) 128 channels controlled via RS232 interface (8 parallel selected) 4.5-16V 110mA nominal transmit 27mA receive -10 to +60 C (Storage -30 to +70 C) 59 x 38 x 10 mm Compliant with ETSI EN 300 220-3 and EN 301 489-3 13pin 0.1" pitch molex 2pin 0.1" pitch molex 3pin 0.1" pitch molex 1.2mm (min.) Supply voltage Current Operating temperature Size Spurious radiations Interface user Power RF Recommended PCB hole size Intended approval ETSI Radio standard EN 300 220-3 and EMC standard EN 301 489-3 +20dBm (100mW) 1dB (factory adjustable 1-100mW) 50 ms FM, FSK (F1D, F3D) DC - 3kHz -37dBm analogue, data (CMOS/TTL compatible) Transmitter Output power TX on switching time Modulation type TX modulation bandwidth Adjacent channel TX power Inputs Receiver Sensitivity image / spurious blocking adjacent channel Outputs Power on to valid audio (no noise mute) Power on to valid audio (with noise mute) Power on to stable data out (50:50 mark / space) -112dBm for 1 part per 1000 BER -118dBm for 12 dB SINAD -70dB -85dB <-60dB (Tested per. ETSI EN 301 489-3 RSSI, carrier detect, audio, data 28ms 45ms 50ms (with or without mute) Notes: 1. The data slicer cannot be depended upon for data waveform frequencies below 250Hz 2. When RX is on and a transmitter keys up, again a 50ms period is required to stabilise data output mark/space. i.e. allow at least 50ms of preamble Radiometrix Ltd TR2M Data Sheet page 9 Transceiver Variants TR2M is designed to be pin and polarity compatible with existing industry standard modules. Analogue and Digital Data Output are inverted relative to original transmitted signal in Receive Mode. The transceiver is available in two variants - TR2I and TR2M TR2M, in Transmit Mode, frequency modulates the carrier frequency in the normal sense whereby higher modulating voltage increases the carrier frequency and lower modulating voltage decreases the carrier frequency which results in an inverted Analogue and Digital Data output on the TR2M in Receive Mode. This will be the standard module and exact plug-in replacement for existing industry standard modules. No modulation 0V 3V Data slicer Vcc AF RXD TR2M (TX mode) TR2M 433.047MHz 433.05MHz 433.053MHz (RX mode) Figure 8: Data polarity change from TR2M (in transmit mode) to TR2M (in receive mode) TR2I, in Transmit Mode, reverses the Frequency Modulating order whereby the higher modulating voltage decreases the carrier frequency and lower modulating voltage increases carrier frequency which results in non-inverting Analogue and Digital Data output on the receiver. This variant can be used for applications where data inversion will be problematic. No modulation 3V 0V Data slicer Vcc AF RXD TR2I (TX mode) TR2I 433.047MHz 433.053MHz 433.05MHz (RX mode) Figure 9: Data polarity change from TR2I (in transmit mode) to TR2I (in receive mode) Ordering information Part Number TR2M-433-5 TR2I-433-5 TR2M-458-5 TR2I-458-5 TR2M-458-10 TR2I-458-10 Radiometrix Ltd Description Frequency band Data rate (max) 5kbps 5kbps 5kbps 5kbps 10kbps 10kbps page 10 TR2M transceiver (inverting receiver) 433.05MHz-434.790MHz TR2I transceiver (inverting transmitter & receiver) 433.05MHz-434.790MHz TR2M transceiver (inverting receiver) 458.525MHz-459.100MHz TR2I transceiver (inverting transmitter & receiver) 458.525MHz-459.100MHz TR2M transceiver (inverting receiver) 458.525MHz-459.100MHz TR2I transceiver (inverting transmitter & receiver) 458.525MHz-459.100MHz TR2M Data Sheet 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 |
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