SMX1-151-5

SMX1 RADIOMETRIX | Alldatasheet

Document overview

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Technical content

Features

! Conforms to ETSI EN 300 220-3 and EN 301 489-3 ! Conforms to Australian/New Zealand AS/NZS 4268:2003 ! North American version compliant with FCC part 90. ! High performance double superhet, 128 channel PLL synthesizer ! Data rates up to 5 kbps for standard module ! Usable range over 1km ! Fully screened. Low profile ! Feature-rich interface (RSSI, analogue and digital baseband) ! Incorporate a 1200baud dumb modem ! Re-programmable 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 ! Operating frequency: 173.200 – 173.325MHz (UK) 150.825 – 152.450MHz (Australia) 154.45625 - 154.47875MHz (North America) 173.20375 - 173.39625MHz (North America) ! Custom variants from 130 – 180MHz on any 1MHz band ! 128 channels controlled via RS232 interface ! Transmit power: +10dBm (10mW) nominal. Adjustable 1 – 50mW ! Supply range: 4.2V - 16V ! Current consumption: 40mA (10mW) - 65mA (50mW) transmit, 20mA receive ! Data bit rate: 5kbps max. (standard module) ! Receiver sensitivity: -120dBm (for 12 dB SINAD) ! Size: 53 x 32 x 12mm SMX1 is small multi-channel VHF transceive r operating on 173.200MHz-173.325MHz band. I t is also available on 151MHz band Australian and 154/173MHz band FCC part 90 allocation. SMX1 offers a fast-route to custom frequenc y on any VHF band from 130MHz to 180MHz with 25kHz / 12.5kHz channel spacing. Figure 1: SMX1-173-5 VHF Narrow Band FM 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 2, 09th November 2009SMX1

Radiometrix Ltd SMX1 Data Sheet page 2 Figure 2: SMX1 block diagram

Radiometrix Ltd SMX1 Data Sheet page 3 Figure 3: SMX1 footprint (Top) view Pin Description Pin Name Function 1a RSSI DC level between 0.5V and 2.5V. 60dB dynamic range 2a Vcc DC supply input. (4.2 – 16V at 40mA nominal) 3a TXD DC coupled input for TTL/ CMOS logic. 4a AF out 500mV p-p audio. DC coupled, approx 0.8V bias. 5a RXD Open collector output of data slicer. Need external pull-up 6a TXE Transmit enable. Low = RX mode. High = TX. (10k pull down) 7a PGM Serial programming / control input (true RS232) 8a 0V Ground 1b 0V Ground 2b S0 Parallel channel select LSB 3b S1 Parallel channel select 4b S2 Parallel channel select MSB Pin description of SMX1 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 (if transmit data is sent to the unit then a transmit burst commences immediately and the contents of the receive data buffer is lost) Pin Name Function 1a RSSI DC level between 0.5v and 2.5v. 60dB dynamic range 2a Vcc DC supply input. (4.2 - 16v at 40mA nom.) 3a NC Leave unconnected 4a NC Leave unconnected 5a MOD RXD Open collector RS232 compatible data output 6a MOD TXD RS232 data input 7a PGM Serial programming/control input (true RS232) 8a 0V Ground 1b 0V Ground 2b S0 Parallel channel select LSB 3b S1 Parallel channel select 4b S2 Parallel channel select MSB NOTES: 1. No inversion occurs between TXD and RXD. However AF out is inverted relative to TXD. 2. Parallel channel selects are active LOW and have internal pullups to 4V 3. There are no pullups on the open collector outputs. 4. The software incorporates a 1200 baud modem, compatible with that implemented in other Radiometrix narrowband units ( i1200 tones and format ). Modem operation is selected by the SETMOD command. TXE pin (6a) becomes an RS232 input, and RS232 compatible data is output on the RXD pin (5a). If true +/- levels are desired then an inverter and a MAX232 should be used on data out. 5. RS232 input pins (6a and 7a) tolerate true +/- levels. No buffering is required. 6. If analogue transmit modulation is needed, then connect a series 1F cap + 500k Ω trimmer in the

Radiometrix Ltd SMX1 Data Sheet page 4 ‘baseband in’ circuit. Adjust trimmer for 90% of peak deviation (+/- 2.7KHz) at mean input level. 7. If parallel channel select is not wanted, the 4 pin connector 'b' can be removed 8. For UK version the following channel assignment is supplied: 9. For Australian version the following channel assignment is supplied: 10. FCC Part 90.238 Telemetry frequency channels (12.5KHz spacing) Channels 173MHz band 154MHz band CH0 173.20375 154.45625 CH1 173.21000 154.46375 CH 2 173.23750 154.47125 CH 3 173.28750 154.47875 CH 4 173.31250 154.45625 CH 5 173.33750 154.46375 CH 6 173.36250 154.47125 CH 7 173.39625 154.47875 FCC frequency units do not use the standard 128 channel code and a special technique is used to provide these frequencies. FCC units are not customer re-programmable (Only SETMOD, GOCHAN, SETPAR, SETSER work. There are no RVALUE or LOAD commands available to the user) Channel Frequency (MHz) 0 173.250 1 173.275 2 173.300 3 173.325 4 -7 173.225 (only used for alarm applications) 8 - 127 173.325 Channel Frequency (MHz) N vlaue 0 150.825 /LOAD 00 6033 1 150.850 /LOAD 01 6034 2 150.875 /LOAD 02 6035 3 150.900 /LOAD 036036 4 150.925 /LOAD 04 6037 5 150.950 /LOAD 05 6038 6 150.975 /LOAD 06 6039 7 151.000 /LOAD 07 6040 8 151.025 /LOAD 08 6041 9 151.050 /LOAD 09 6042 10 151.075 /LOAD 10 6043 11 151.100 /LOAD 11 6044 12 151.125 /LOAD 12 6045 13 151.150 /LOAD 13 6046 14 151.175 /LOAD 14 6047 15 151.200 /LOAD 15 6048 16 151.225 /LOADTB 6049 17 - 65 in sequence starting at CH 17 (151.250)

Radiometrix Ltd SMX1 Data Sheet page 5 SMX1 serial interface commands 2400 baud at RS232 level. 8 bit data, no parity, 1 start bit, 1 or 2 stop bits, No flow control. Transmit (pin 3 on DB9) and Signal Ground (pin 5 on DB9) should be connected to PGM and 0V respectively. SINGLE nnnnn Set value of N for single channel operation (value not stored in eeprom) GOCHAN xx Serial select of channel xx (0 to 127) LOADMX xx Set highest permitted (serial selected) channel xx (others default to ch0) LOAD aa nnnnn Set value of N for channel aa (channels 0 to 15) LOADTB nnnnn Set value of N for channel 16 (channels 17 to 127 then in sequence) RVALUE rrrr Enter value for R register SETPAR Channel selected by 3 bit parallel input (0 to 7). Also disables modem SETSER Channel selected by most recent 'gochan' operation SETMOD Enable internal modem. Frequency selected by most recent 'gochan' or 'single' OFFSET ooo Set receive frequency offset (for 25KHz channel this is 856) <cr> Process entry / Clear all buffers xx = channel number from 00 to 127 aa = two digit channel number from 00 to 15 nnnnn = synthesizer N register value, (up to 65535) rrrr = synthesizer R register value, (up to 16383) ooo = frequency offset 5760kHz25 MHz144 f fN cingChannelspa RF === kHz25 MHz10 f fR cingchannelspa Xtal == , So R=400 RX OFFSET = IF/Channel spacing = 21.4MHz /25kHz = 856 Notes: 1. A pause of at least 100ms 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. Old mk1 units had a 13MHz (RVALUE 520) reference, while new (current) mk2 units have 10MHz (RVALUE 400).

Radiometrix Ltd SMX1 Data Sheet page 6 Condensed specifications Frequency Any 2MHz band from 130-180MHz 173.200 - 173.325 MHz UK std. 150.825 - 152.450MHz Australian std 154.45625 - 154.47875MHz (12.5kHz steps) – FCC part 90 173.20375 - 173.39625MHz (12.5kHz steps) - FCC part 90 Frequency stability +/-5ppm (better than ±1.5kHz) Channel spacing 25kHz (12.5kHz for North America) Number of channels 128 channels selected via serial RS232 interface 8 channels selected via 3 frequency select pins used as standard; 151MHz band (Australian) unit has 66 channels Supply voltage 4.2V-16V Current 40mA (10mW); 65mA (50mW) transmit 20mA receive (or modem ‘idle’) Operating temperature -20 to +70 °C (Storage -30 to +70 °C) Size 53 x 32 x 12 mm Spurious radiations Compliant with ETSI EN 300 220-3 and EN 300 686 Interface user 8 pin 0.1" pitch molex Power 4 pin 0.1" pitch molex RF 3 pin 0.1" pitch molex Recommended PCB hole size 1.2mm (min.) Intended approval Australian/New Zealand AS/NZS 4268:2003, US FCC part 90.238 ETSI EN 300 220-3 (radio) and EN 301 489-3 (EMC) standards Transmitter Output power UK standard +10dBm(10mW) ± 1dB (factory adjustable: 1 - 50mW) TX on switching time <50 ms Modulation type FM, FSK (F1D, F3D) TX modulation bandwidth DC – 3kHz Deviation ±2.6kHz to ±3kHz Adjacent channel TX power -37dBm Inputs data (CMOS/TTL compatible) Receiver Sensitivity -120dBm for 12dB SINAD image / spurious -65dB blocking -85dB adjacent channel -65dB Outputs RSSI, Audio, Data Power on to valid audio 28ms Power on to stable data out 50ms (for 50:50 mark / space) 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

Ordering Information

Part No. Description Frequency band (MHz) SMX1-151-5 Australian version 150.825 – 152.450MHz SMX1-173-5 UK version 173.200 - 173.325 MHz SMX1-154-5-12K5-FCC North American version 154.45625 - 154.47875MHz SMX1-173-5-12K5-FCC North American version 173.20375 - 173.39625MHz SMX1-xxx-5 Where xxx is any 2MHz band from 135MHz to 175MHz

Radiometrix Ltd SMX1 Data Sheet page 7 Application circuits RSSI (1a) Vcc (2a) TXD (3a) AF (4a) RXD (5a) TXE (6a) PGM (7a) 0V (1b) S0 (2b) S1 (3b) S2 (4b) 1kΩ 1kΩ 1kΩ RX TX Microcontroller SMX1

3 TXD

4.2-16V Figure 4: SMX1 interfaced to host microcontroller and serial port for configuration RSSI (1a) Vcc (2a) TXD (3a) AF (4a) MOD RXD (5a) MOD TXD (6a) PGM (7a) 0V (1b) S0 (2b) S1 (3b) S2 (4b) SMX1 (for 5V) Figure 5: SMX1 interfaced to PC serial port (0V / 5V RS232 level) RSSI (1a) Vcc (2a) TXD (3a) AF (4a) MOD RXD (5a) MOD TXD (6a) PGM (7a) 0V (1b) S0 (2b) S1 (3b) S2 (4b) SMX1 (for 5V) MAX232 16 (+5V) Figure 6: SMX1 interfaced to serial port (+10V / -10V RS232 level)

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 wholeor 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