WFX2

WFX2 RADIOMETRIX | Alldatasheet

Document overview

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• PDF pages: 7

Technical content

Features

/square4 Conforms to EN 300 220-2 and EN 301 489-3 /square4 High performance double superhet Low noise PLL Synthesizer with TCXO /square4 Data rates up to 5 kbps for standard module /square4 Usable range over 5km /square4 Fully screened /square4 Feature-rich interface (RSSI, analogue and digital baseband) /square4 User configurable via serial interface

Applications

/square4 Heavy vehicle/machine remote controls /square4 Data loggers /square4 Industrial / Commercial Telemetry and Telecommand /square4 In-building environmental monitoring and control /square4 High-end security and fire alarms /square4 Vehicle data up/download Technical Summary /square4 Operating frequency: 458.525-459.1MHz (UK) /square4 Up to 256 channels (32 individually programmed channels). /square4 Transmit power: +27dBm (500mW) nominal /square4 Supply range: 5V DC /square4 Current consumption: 380mA transmit, 35mA receive /square4 Data bit rate: 5kbps max. (standard module) /square4 9600baud GMSK for (–G variant) /square4 Receiver sensitivity: -118dBm (for 12 dB SINAD) The WFX2 is a high power fast - switching multi-channel narrowband FM tran sceiver, capable of 500mW RF power output on 458.5 -459.5MHz. Figure 1: WFX2 -458 -5 500mW High power, fast, multi-channel transceiver 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, 28 May 2012 WFX2

Radiometrix Ltd WFX2 Data Sheet page 2 Figure 2: WFX2 Block Diagram

Radiometrix Ltd WFX2 Data Sheet page 3 Figure 3: WFX2 basic footprint Pin Description Notes: 1. There is a 47k Ω pull-up to 5V on RXD output 2. Logic inputs (P3, P2, P1, P0/PGM, /TXE) have internal pull-ups to 5V (Approximately 50k Ω on P3, P2 and P1. 10k Ω 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 1.5k Ω 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 Pins Normal mode User

1 GND Ground

2 RXON Active Low Receiver ON Indicator logic output

3 TXON Active Low Transmitter ON Indicator logic output

4 TXE Active Low Transmit Enable Input. /TXE=5V or Open for Receiver Enable 5 TXD Transmit Data Input DC coupled for 3V-12V CMOS logic. (5kbps standard) 1V pk-pk , 2.5V biased DC coupled AFIN input (-G variant for 9600 baud GMSK)

6 VCC Externally regulated +5V <400mA DC supply

7 P3 P3 (MSB) Parallel Channel Selection Input ‘0’=5V (NC), ‘1’=0V (GND)

8 P2 P2 Parallel Channel Selection Input ‘0’=5V (NC), ‘1’=0V (GND)

9 P1 P1 Parallel Channel Selection Input ‘0’=5V (NC), ‘1’=0V (GND)

10 P0/PGM 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. 47k Ω internal pull-up to VCC 2a AF 300mV pk-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

Radiometrix Ltd WFX2 Data Sheet page 4 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 serial select of channel aaa (ch0 to 255) and program to EEPROM GOTEMP aaa volatile serial select of channel aaa (ch0 to 255) LOAD aa nnnnn set value of N for channel aa (channels 0 to 31) LOADTB nnnnn set value of N for start of sequential table (chan 32) LOADMX aaa set highest usable channel number (applies to sequential table only) setting this to zero disables the sequential table RVALUE rrrr set value for R register SINGLE nnnnn set value of N for single channel operation. N value NOT stored in e2prom INCREM x sequential table step value SETPAR channel selected by 4 bit parallel input (ch0 to 15 only) (also cancels a LOCKSM command) SETSER channel selected by most recent 'gochan' operation LOCKSM unit now defaults to serial operation at power up DUMPEE outputs the whole e2prom memory field at 2400 baud, using P3 as an output (128 consecutive unformatted bytes) <cr> 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) 17485 25 4 .21 525 .458 4 .21 =−=−= kHz MHz MHz kHz MHz fN RF )(520 25 13 usually kHz MHz f fR frequency comparison TCXO ===

Radiometrix Ltd WFX2 Data Sheet page 6 Condensed specifications Frequency 458.525 - 459.1MHz (UK) Other country specific licence-exempt 0.5W UHF band subject to SAW filter availability Frequency stability ± 1.5kHz Channel spacing 25kHz or 12.5kHz (5kbps standard) 25kHz only (-G variant) Number of channels 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) Transmit Output power +27dBm (500mW) ±1dB TX on switching time <10 ms Modulation type FM, FSK (F1D, F3D) TX modulation bandwidth DC – 3kHz Input for CMOS/TTL compatible data (a wide bandwidth -G version has DC to >5KHz and an analogue input) Deviation ± 3kHz (for 25kHz channel spacing) Adjacent channel TX power -37dBm TX Spurii All compliant with EN 300-220 (harmonics <-36dBm) Receive Sensitivity -118dBm for 12 dB SINAD image / spurious -80dB blocking -88dB adjacent channel <-65dB (Tested per. ETSI EN 300 086) Outputs RSSI, Audio, Data Spurious radiations Compliant with ETSI EN 300 220-3 and EN 301 489-3 Supply Voltage +5V DC (externally regulated) Current 380mA nominal transmit 35mA receive Interface user 10pin 0.1" pitch molex 4 pin 0.1" pitch molex (4 way DIP switch) RF 4 pin 0.1" pitch molex 50 Ω impedance Operating temperature -20 to +55 °C (Storage -30 to +70 °C) Intended approval ETSI EN 300 220-2 (radio) ETSI EN 301 489-3 (EMC) FCC Part 90 compliance

Ordering Information

Part Number Variant description WFX2-458-5 5kbps (max) standard WFX2-458-G 9600 baud external GMSK modem variant WFX2-458-5-PWC RF Power Control option WFX2-458-G-PWC RF Power Control option for –G variant

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/ 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 information.requests@ofcom.org.uk European Communications Office (ECO) Peblingehus Nansensgade 19 DK 1366 Copenhagen Tel. +45 33896300 Fax +45 33896330 ero@ero.dk www.ero.dk