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 WFX2 Issue 1, 28 May 2012 500mW High power, fast, multi-channel transceiver The WFX2 is a high power fastswitching multi-channel narrowband FM transceiver, capable of 500mW RF power output on 458.5-459.5MHz. Figure 1: WFX2-458-5 Features Conforms to EN 300 220-2 and EN 301 489-3 High performance double superhet Low noise PLL Synthesizer with TCXO Data rates up to 5 kbps for standard module Usable range over 5km Fully screened Feature-rich interface (RSSI, analogue and digital baseband) User configurable via serial interface Applications Heavy vehicle/machine remote controls Data loggers Industrial / Commercial Telemetry and Telecommand In-building environmental monitoring and control High-end security and fire alarms Vehicle data up/download Technical Summary Operating frequency: 458.525-459.1MHz (UK) Up to 256 channels (32 individually programmed channels). Transmit power: +27dBm (500mW) nominal Supply range: 5V DC Current consumption: 380mA transmit, 35mA receive Data bit rate: 5kbps max. (standard module) 9600baud GMSK for (–G variant) Receiver sensitivity: -118dBm (for 12 dB SINAD) Radiometrix Ltd WFX2 Data Sheet page 1 Figure 2: WFX2 Block Diagram Radiometrix Ltd WFX2 Data Sheet page 2 Figure 3: WFX2 basic footprint Pin Description Pins User 1 2 3 4 Normal mode GND RXON TXON 5 TXE TXD 6 7 8 9 10 VCC P3 P2 P1 P0/PGM Ground Active Low Receiver ON Indicator logic output Active Low Transmitter ON Indicator logic output Active Low Transmit Enable Input. /TXE=5V or Open for Receiver Enable Transmit Data Input DC coupled for 3V-12V CMOS logic. (5kbps standard) 1Vpk-pk, 2.5V biased DC coupled AFIN input (-G variant for 9600 baud GMSK) Externally regulated +5V <400mA DC supply P3 (MSB) Parallel Channel Selection Input ‘0’=5V (NC), ‘1’=0V (GND) P2 Parallel Channel Selection Input ‘0’=5V (NC), ‘1’=0V (GND) P1 Parallel Channel Selection Input ‘0’=5V (NC), ‘1’=0V (GND) P0 (LSB) Parallel Channel Selection Input ‘0’=5V (NC), ‘1’=0V (GND) Serial Programming Input 5V TTL level UART format (Inverted RS232) User 1a RXD Open collector output of data slicer. 47kΩ internal pull-up to VCC 2a AF 300mVpk-pk Audio. DC coupled, approx 1V bias 3a RSSI DC level between 0.5V and 2.5V. 60dB dynamic range 4a GND Ground RF 1b RFGND RF Ground 2b RF RF Input/Output for Aerial connection 3b RFGND RF Ground 4b RFGND RF Ground Notes: 1. There is a 47kΩ pull-up to 5V on RXD output 2. Logic inputs (P3, P2, P1, P0/PGM, /TXE) have internal pull-ups to 5V (Approximately 50kΩ on P3, P2 and P1. 10kΩ on P0/PGM and /TXE) 3. /RXON (pins 2) and /TXON (pin 3) are CMOS logic outputs from the control processor. For interest, pin 2 goes low when the receiver circuits are enabled pin 3 goes low when the transmitter circuits activate If both are high for more than 10ms, then this indicates the PLL is out of lock Normally these pins are left Not Connected (NC) A 2mA LED (with series 1.5kΩ resistor) from /TXON to 5V will light up when the unit transmits 4. PGM uses 2400bps, 8 data bits, no parity, 1 stop bit, no flow control asynchronous data format Radiometrix Ltd WFX2 Data Sheet page 3 Programming (255 channel version) PGM Serial data is sent to the unit on one of the parallel channel select (P0) pin 10. This pin can also be connected to a parallel channel select switch, so it is very important that the unit does not 'decode' switch bounce in ordinary operation as a command string, or spurious re-writing of the EEPROM will result. For this reason the user must send the 16 character string ENABLESERIALMODE (followed by a carriage return 0x0D) to fully enable the serial command mode before sending any of the command strings listed below. Command mode is disabled on power down, on reception of a # (0x23) character, or the execution of a SETPAR command. Issuing a LOCKSM command (after an ENABLESERIALMODE, of course) will lock the unit into serial mode (useful if the module is never being used with parallel channel select). In this mode only a SETPAR will return it to the basic parallel select operation The command decoder used in the WFX2 firmware is very simple. It consists of a six character text buffer, followed by a 16 bit numeric register (in any given command entry sequence the first six characters will be interpreted as text, then any subsequent input will be interpreted as a number. Numeric input is assumed to be in decimal) The <cr> character initiates the command. The contents of the text buffer is parsed for a valid command, the command enacted and the buffer cleared. This process takes several milliseconds. If the command requires writes to the internal EEPROM, this "command latency" will extend to over fifty milliseconds. When a GOCHAN command is enacted when in serial mode, the new "default" channel is stored in EEPROM. If the unit is then cycled OFF and ON again the channel will remain the last GOCHAN value (and the parallel port remains inactive) until another ENABLESERIALMODE is sent The "channel map" relates channel number to PLL synth N register value, and hence frequency. The first 32 channels have individually programmable N values The remaining channels (32 to 255) are a sequential table, with programmable start frequency, maximum channel and step value GOCHAN aaa GOTEMP aaa LOAD aa nnnnn LOADTB nnnnn LOADMX aaa RVALUE rrrr SINGLE nnnnn INCREM SETPAR x SETSER LOCKSM DUMPEE <cr> / # serial select of channel aaa (ch0 to 255) and program to EEPROM volatile serial select of channel aaa (ch0 to 255) set value of N for channel aa (channels 0 to 31) set value of N for start of sequential table (chan 32) set highest usable channel number (applies to sequential table only) setting this to zero disables the sequential table set value for R register set value of N for single channel operation. N value NOT stored in e2prom sequential table step value channel selected by 4 bit parallel input (ch0 to 15 only) (also cancels a LOCKSM command) channel selected by most recent 'gochan' operation unit now defaults to serial operation at power up outputs the whole e2prom memory field at 2400 baud, using P3 as an output (128 consecutive unformatted bytes) process entry clear all buffers disable serial command mode aaa = channel number from 0 to 255 nnnnn = a synthesizer N register value, (up to 65535) rrrr = the synthesizer R register value, (up to 16383) x = sequential table step value (0-7) N= R= f RF − 21.4 MHz 458.525MHz − 21.4 MHz = = 17485 25kHz 25kHz f TCXO f comparison frequency Radiometrix Ltd = 13MHz = 520 (usually ) 25kHz WFX2 Data Sheet page 4 Figure 4: WFX2 Modem variant footprint Figure 5: WFX2 Power Control variant footprint Figure 6: WFX2 external Power Control circuit Radiometrix Ltd WFX2 Data Sheet page 5 Condensed specifications Frequency Frequency stability Channel spacing Number of channels Transmit Output power TX on switching time Modulation type TX modulation bandwidth Deviation Adjacent channel TX power TX Spurii Receive Sensitivity image / spurious blocking adjacent channel Outputs Spurious radiations Supply 458.525 - 459.1MHz (UK) Other country specific licence-exempt 0.5W UHF band subject to SAW filter availability ± 1.5kHz 25kHz or 12.5kHz (5kbps standard) 25kHz only (-G variant) 256 Consisting of 32 individually programmed channels, plus a sequential table covering the remaining 224. (All 255 can be selected via the serial interface, or 16 via 4 parallel input pins or optional on-board DIP switch) +27dBm (500mW) ±1dB <10 ms FM, FSK (F1D, F3D) DC – 3kHz Input for CMOS/TTL compatible data (a wide bandwidth -G version has DC to >5KHz and an analogue input) ± 3kHz (for 25kHz channel spacing) -37dBm All compliant with EN 300-220 (harmonics <-36dBm) -118dBm for 12 dB SINAD -80dB -88dB <-65dB (Tested per. ETSI EN 300 086) RSSI, Audio, Data Compliant with ETSI EN 300 220-3 and EN 301 489-3 Voltage Current +5V DC (externally regulated) 380mA nominal transmit 35mA receive user 10pin 0.1" pitch molex 4 pin 0.1" pitch molex (4 way DIP switch) 4 pin 0.1" pitch molex 50Ω impedance Interface RF Operating temperature -20 to +55 °C (Storage -30 to +70 °C) ETSI EN 300 220-2 (radio) ETSI EN 301 489-3 (EMC) FCC Part 90 compliance Intended approval Ordering Information Part Number WFX2-458-5 WFX2-458-G WFX2-458-5-PWC WFX2-458-G-PWC Radiometrix Ltd Variant description 5kbps (max) standard 9600 baud external GMSK modem variant RF Power Control option RF Power Control option for –G variant WFX2 Data Sheet page 6 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://www.ofcom.org.uk/ Information Requests Ofcom Riverside House 2a Southwark Bridge Road London SE1 9HA Tel: +44 (0)300 123 3333 or 020 7981 3040 Fax: +44 (0)20 7981 3333 [email protected] European Communications Office (ECO) Peblingehus Nansensgade 19 DK 1366 Copenhagen Tel. +45 33896300 Fax +45 33896330 [email protected] www.ero.dk