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 Issue 1, 12 February 2013 SFX2 500mW NBFM Multi-channel UHF Transceiver The SFX2 transceiver module offers a 500mW RF power output in the UK 458MHz band. This makes the SFX2 ideally suited to those low power applications where existing multi-channel narrow band devices like TR2M have insufficient range. Features Figure 1: SFX2-458-5 transceiver Conforms to EN 300 220-3 and EN 301 489-3 High performance double superhet, 255 channel PLL Synthesizer with TCXO Data rates up to 5 kbps for standard module Fast TX switching time (5ms typ.) Usable range over 5km (@ 500mW) Fully screened Feature-rich interface (RSSI, automatic noise squelch, analogue and digital baseband) User configurable via RS232 interface 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 Operating frequency: 458.5-459.1MHz UK (23 channels) Up to 255 channels (8 parallel selected). Transmit power: +27dBm nominal (adjustable 100 - 500mW) Supply range: 6V - 9V (100% duty cycle), 6V – 15V (10% duty cycle) Current consumption: 350mA transmit, 35mA receive Data bit rate: 5kbps max. (standard module) Receiver sensitivity: -118dBm (for 12 dB SINAD) Size: 59 x 39 x 15mm Evaluation platforms: NBEK + xx2M Series carrier Radiometrix Ltd SFX2 Data Sheet page 1 Figure 2: SFX2 block diagram Radiometrix Ltd SFX2 Data Sheet page 2 Figure 3: SFX2 Footprint (Top) view Pin Description - SFX2 Pins A1 A2 Name Vcc GND Function 6V - 15V Ground B1 B2 B3 RF GND RF RF GND RF ground To the antenna RF ground C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 TXE TXD AF in RSSI SQF AF out RXD +5V out 0V PGM P1 P2 P3 Transmitter Enable. Low = ON, Open = RX mode. Internal 10kΩ pull-up to 5V DC coupled digital data input for 3-12V CMOS logic. Leave open if unused 50mV - 2.5v p-p AC coupled input. Variable gain 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. 100mA max. drain. Present if unit is powered Ground Serial programming/configuration input at RS232 level Parallel frequency select inputs. Inverted logic, internal 50kΩ pullups to 5V Notes: 1. By changing specific links and components, either the rx and/or the tx path can be made to invert the sense of the baseband waveform, or not. Standard issue SFX2 inverts on both tx and rx paths (so is equivalent to a TR2I-458-5) 2. Carrier detect mutes the AF and DATA outputs. It can be disabled by either rotating the level set trimmer fully ACW (disabling both) or by removing the solder link (which disables only the AF mute). The carrier detect is relatively slow (approx 25mS) so is not compatible with the full sub 10mS tx/rx switching speed capability of the unit 3. There is no pullup on the SQF open collector output. RXD has 47K to internal 5v 4. Unlike the parent TR2M, the SFX2 does not incorporate an i1200 modem 5. RS232 input (pin 10) tolerates true +/- levels. No buffering is required. Radiometrix Ltd SFX2 Data Sheet page 3 Channel mapping The SFX2 has a 255 channel capacity. The first 32 channels are individually programmable (they have their own N register stores). The remaining channels (32-255) constitute a sequential table In serial mode the channel is selected by a GOCHAN xxx command In parallel mode the lowest 8 channels are selected by the state of P1, P2, P3 SFX2 serial configuration commands 2400 baud RS232. 8 bit data, no parity, 1 start bit, 1 or 2 stop bits, No flow control SINGLE nnnnn GOCHAN xxx GOTEMP xxx LOAD aa nnnnn LOADTB nnnnn LOADMX aaa RVALUE rrrr INCREM i SETPAR SETSER DUMPEE <cr> / Set value of N for single channel operation. N value NOT stored in EEPROM Serial select of channel aaa (ch0 to 255), store to EEPROM Volatile version of GOCHAN Set value of N for channel aa (channels 0 to 31) Set value of N for channel 32 (channels 32 to 255 then in sequence) Set highest permitted (serial selected) channel xxx (others default to ch0) Set value for R register Set increment value for sequential table (0-7) Channel selected by 3 bit parallel input (ch0 to 7 only) (Disable LOCKSM command) Channel selected by most recent 'gochan' operation Output entire EEPROM contents (128 unformatted bytes) using the P3 pin as an output Process entry Clear all buffers xxx = channel number from 0 to 255 aa = a two digit channel number from 00 to 31 nnnnn = a synthesizer N register value, (up to 65535) rrrr = the synthesizer R register value, (up to 16383) i = sequential table step value (0-7) f RF − 21.4 MHz 458.525MHz − 21.4 MHz = = 17485 25kHz 25kHz f TCXO 13MHz R= = = 520 (usually ) f comparison frequency 25kHz N= 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 SFX2 Data Sheet page 4 Condensed specifications Frequency Frequency stability Channel spacing Number of channels Supply voltage Current 458.5 - 459.1MHz (in UK allocation) as standard Other UHF frequencies available on request +/- 1.5kHz 25kHz (12.5kHz by special order) 255 channels controlled via RS232 interface (8 parallel selected) 6v - 9v (100% duty cycle) 6v - 15v (10% duty cycle) 5v regulated only version available 350mA nominal transmit 35mA receive ο ο Operating temperature Size Spurious radiations Interface user Power RF Recommended PCB hole size 13pin 0.1" pitch molex 2pin 0.1" pitch molex 3pin 0.1" pitch molex 1.2mm (min.) Intended approval ETSI Radio standard EN 300 220-3 and EMC standard EN 301 489-3 Transmitter Output power TX on switching time Modulation type Deviation TX modulation bandwidth Adjacent channel TX power Inputs Spurious radiations +27dBm (500mW) ±1dB (factory adjustable 100 - 500mW) 5 ms nominal (sub 10ms guaranteed) FM, FSK (F1D, F3D) ± 3kHz DC – 3kHz <-37dBm (<200nW) analogue, data (CMOS/TTL compatible) Compliant with ETSI EN 300 220-3 and EN 301 489-3 Receiver Sensitivity adjacent channel image / spurious blocking Outputs SFX2 timing TXE low to TX full power TXE high to valid data on RXD RSSI attack/delay time Carrier Detect response -10 to +55 C (Storage -30 to +70 C) 59 x 39 x 15 mm Compliant with ETSI EN 300 220-3 and EN 301 489-3 -118dBm for 12 dB SINAD 65dB >70dB 85dB or better RSSI, carrier detect, audio, data 5ms 5ms <20ms approx. 20 – 30ms (25ms typical) Ordering information Part No. SFX2-458-5 Radiometrix Ltd Frequency band 458.5-459.1MHz UK (23 channels) SFX2 Data Sheet Data rate (max) 5kbps page 5 Radiometrix Ltd Hartcran House 231 Kenton Lane Harrow, Middlesex HA3 8RP ENGLAND Tel: +44 (0) 20 8909 9595 Fax: +44 (0) 20 8909 2233 [email protected] 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://stakeholders.ofcom.org.uk/spectrum/technical/rtte/ 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 [email protected] European Radiocommunications Office (ERO) Peblingehus Nansensgade 19 DK 1366 Copenhagen Tel. +45 33896300 Fax +45 33896330 [email protected] www.ero.dk