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| EW N Issue 4, 27 July 2005 Radiometrix Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233 TLC2/RLC2 UHF Narrow Band FM Low Cost multi channel radio modules multi The TLC2 transmitter RLC2 receiver modules offer a low power, reliable data link in an industry-standard pin out and footprint. This makes the TLC2/RLC2 pair ideally suited to those low power applications where existing wideband modules have insufficient range, or where low cost multi-channel operation is needed without compromising on RF specification or regulatory requirement. Figure 1: RLC2 receiver, TLC2 transmitter Features * * * * * * * * * 433MHz version conforms to EN 300 220-3 and EN 301 489-3 High performance double superhet. PLL synthesizer with TCXO SAW front-end filter Data rates up to 5 kbps for standard module Usable range over 500m Fully screened. Low profile Feature-rich interface (RSSI, analogue and digital baseband) Re-programmable via RS232 interface Low power requirements Applications * * * * * * * * * Handheld terminals EPOS equipment, barcode scanners Data loggers Industrial telemetry and telecommand In-building environmental monitoring and control High-end security and fire alarms DGPS systems Vehicle data up/download Heavy vehicle/machinery controls Technical Summary * * * * * * * * * Operating frequency: 433.875-434.650MHz Any custom frequency on 433MHz - 435MHz 32 channels in 433MHz band Transmit power: +10dBm (10mW) Supply range: 4.0 - 15V (TLC2), 1.8 - 10V (TLC2LV) 3.7 - 15V (RLC2) Current consumption: 32mA (TX), 18mA (RX) Data bit rate: 5kbps max. (standard module) Receiver sensitivity: -120dBm (for 12 dB SINAD) Serial configuration by inverted RS232 at 3V CMOS level Radiometrix Ltd TLC2/RLC2 Data Sheet page 1 Radiometrix Ltd TLC2/RLC2 Data Sheet Figure 2: TLC2 block diagram page 2 Figure 3: TLC2 footpint (top view) Pin description - TLC2 Pin 1 2 3 4 5 P0/PGM P1 P2 P3 Jumper P4 Name Vcc No pin TXD No pin 0V Parallel channel select, bit 0 Parallel channel select, bit 1 Parallel channel select, bit 2 Parallel channel select, bit 3 Parallel channel select, bit 4 (MSB) Function power supply : 4 - 15V (TLC2) and 1.8 - 10V (TLC2LV) Not present TLC2: DC coupled input for 3V CMOS logic. Rin=100k TLC2LV: DC coupled input for CMOS logic5. Rin=47k Not present Ground True logic (0V = low). Weak pullup to 3V; Serial frequency programming / configuration1 True logic (0V = low). Weak pullup to 3V True logic (0V = low). Weak pullup to 3V True logic (0V = low). Weak pullup to 3V Jumper soldered, P4=0 (Channel 00 - Channel 15 at 50kHz step) Jumper clear, P4=1 (Channel 16 - Channel 31 at 50kHz step) 1. Serial programming is by an inverted 2400 baud RS232 at 3V CMOS level command into the PGM. If connection to a true RS232 port is desired, then a suitable inverting level shifter / buffer (MAX232 or NPN switch transistor) is needed. 2. Parallel channel selection is by a true logic (0V=0, 3V=1), 4-pin parallel input (MSB selected by jumper). 3. Channel select inputs have 10k weak internal pull-up to 3V internal rail. Do not exceed 3V logic levels on this port. 4. TLC2LV will shutdown if Vcc falls below 1.6V 5. TXD (TLC2LV): logic low < 1.3V, logic high > 1.7V. TXD maximum voltage = 10V Radiometrix Ltd TLC2/RLC2 Data Sheet page 3 Radiometrix Ltd TLC2/RLC2 Data Sheet Figure 4: RLC2 block diagram page 4 Figure 5: RLC2 footpint (top view) Pin description - RLC2 Pin 1 2 3 4 5 P0/PGM P1 P2 P3 Jumper P4 Name Vcc RSSI 0V RXD AF Parallel channel select, bit 0 Parallel channel select, bit 1 Parallel channel select, bit 2 Parallel channel select, bit 3 Parallel channel select, bit 4 Function DC supply (3.7V to 15V, at 18mA). 0.5V-2.5V DC level. 60dB dynamic range. 40k output impedance Ground Open collector digital data output with internal 47k pull-up to Vcc 600mV pk-pk audio. DC coupled, approx 0.8V bias. True logic (0V = low). Weak pullup to 3.5V Serial frequency programming / configuration1 True logic (0V = low). Weak pullup to 3.5V True logic (0V = low). Weak pullup to 3.5V True logic (0V = low). Weak pullup to 3.5V Jumper soldered, P4=0 (Channel 00 - Channel 15 at 50kHz step) Jumper clear, P4=1 (Channel 16 - Channel 31 at 50kHz step) NOTES: 1. Serial programming is by a 2400 baud inverted 'RS232' (3V CMOS levels) datastream applied to the P0 pin. If connection to a true RS232 port is desired, then a suitable inverting level shifter / buffer (MAX232 or NPN switch transistor) is needed. 2. Parallel channel select is by a 4 pin parallel input (MSB selected by jumper). 3V CMOS levels should be used. 3. As supplied the frequency table is thus: ch 0-15 433.875 - 434.625 MHz (50KHz steps) ch 16-31 433.9 - 434.65 MHz (50KHz steps) Radiometrix Ltd TLC2/RLC2 Data Sheet page 5 Serial interface commands 2400 baud RS232. 8 bit data, no parity, 1 start bit, 1 or 2 stop bits. Serial data is sent to the unit on one of the parallel channel select pins (P0). It is very important that the unit does not `decode' switch bounce in ordinary operation as a command string, or spurious rewriting of the EEPROM will result. For this reason the user must send the 16 character string ENABLESERIALMODE to fully enable the serial command mode before sending any of the command strings listed below. Command mode is disabled on power down, or on reception of a # character. GOCHAN xx LOAD aa nnnnn SETPAR SETSER RVALUE rrrr SINGLE nnnnn xx = a channel number from 00 to 31 aa = a two digit channel number from 00 to 31 nnnnn = synthesizer N register value (up to 65535) rrrr = synthesizer R register value (up to 16383) N TX = f RF f Channelspacing = 433.875MHz = 17355 25kHz R= f TCXO f channelspacing = 13MHz , So R=520 25kHz N RX = f RF - 21.4MHz 433.875MHz - 21.4 = = 16499 f Channelspacing 25kHz Note: A pause of at least 25ms 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. Radiometrix Ltd TLC2/RLC2 Data Sheet page 6 TLC2, RLC2 channels are spaced at 50kHz interval into two frequency groups. 50kHz spacing between sequential channels minimises adjacent channel interference. P4 jumper link determines which frequency group is selected. Channel (P4 soldered) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Frequency (MHz) 433.875 433.925 17 433.975 18 434.025 19 434.075 20 434.125 21 434.175 22 434.225 23 434.275 24 434.325 25 434.375 26 434.425 27 434.475 28 434.525 29 434.575 30 434.625 31 434.650 434.600 434.550 434.500 434.450 434.400 434.350 434.300 434.250 434.200 434.150 434.100 434.050 434.000 433.950 Channel (P4 clear) 16 Frequency (MHz) 433.900 Radiometrix Ltd TLC2/RLC2 Data Sheet page 7 Condensed specifications Frequency Peak deviation Frequency stability Channel spacing Number of channels Operating temperature Spurious radiations Transmitter Output power TX on switching time Modulation type TX modulation bandwidth Adjacent channel TX power TX spurious Supply Voltage Current 433.875-434.675MHz (custom variants on 433MHz - 435MHz) 3kHz 1.5kHz 25kHz (12.5kHz by special order) 32 channels selected via RS232 interface or 2 x 16 groups by parallel port -10 C to +60 C (Storage -30 C to +70 C) Compliant with ETSI EN 300 220-3 and EN 301 489-3 +10dBm (10mW) 1dB (1mW or 5mW by special order) 50ms from power up FSK (F3D) DC - 5kHz (3V CMOS compatible) <-37dBm <-50dBm (<-60dBm in standby) TLC2: 4.0V - 15V TLC2LV: 1.8V - 10V (do not exceed 10V) TLC2: 32mA nominal TLC2LV: 27mA nominal at 5V 66mA at 2V 45mA at 3V 20mA at 7V 17mA at 9V analogue, data (CMOS/TTL compatible) 37 x 27 x 8mm 3pin 0.2" pitch molex 4pin 0.1" pitch molex 2pin 3mm pitch 1.2mm Inputs Size Interface User Channel RF Recommended PCB hole size Receiver Sensitivity S/N ratio AF bandwidth (-3dB) image / spurious / adjacent channel Blocking LO re-radiation Supply Voltage Current Outputs Size Interface User Channel RF Recommended PCB hole size Power on to valid audio Power on to stable data out (50:50 mark / space) -112dBm for 1 part per 1000 BER -120dBm for 12 dB SINAD 35dB (min), 40dB (typ) on AF output 4kHz <-60dB <-85dB <-60dBm 3.7V - 15V 18mA RSSI, audio, data 50 x 30 x 10mm 5pin 0.1" pitch molex 4pin 0.1" pitch molex 2pin 0.1" pitch molex 1.2mm 28ms 50ms 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 TLC2/RLC2 Data Sheet page 8 RX Received Signal Strength Indicator (RSSI) The RLC2 has wide range RSSI that measures the strength of an incoming signal over a range of 60dB or more. This allows assessment of link quality and available margin and is useful when performing range tests. The output on pin 2 of the module has a standing DC bias of up to 0.4V with no signal, rising to 2.5V at maximum indication (RF input levels of -40dBm and above). Vmin-max is typically 2V and is largely independent of standing bias variations. Output impedance is 40k. Pin 2 can drive a 100mA meter directly, for simple monitoring. Figure 6: RSSI level with respect to received RF level at RLC2 antenna pin Low Cost TLC2 transmitter differs from standard BMT2 transmitter in the following key features. BMT2 Industry standard (extra 2 pins) 400-480MHz (any 5MHz band) 32 parallel or 256 serial 5 bit optional 4 pins (and 1 jumper link) Pin 2 Pin 4 1200 baud modem 2.4V-15, 40mA TLC2 Industry standard 433.875 - 434.650Hz (only) 32 parallel/serial Not available 4 pins (and 1 jumper link) Via S0/PGM pin not present on TLC2 Not available 4V-15, 32mA Footprint Frequency band Channels Channel select switches Parallel channel select Serial Frequency programming Transmit Enable Modem Supply Low Cost RLC2 receiver differs from standard BMR2 receiver in the following key features. BMR2 Industry standard 400-480MHz (any 5MHz band) 32 parallel or 256 serial 5 bit internal 4 pins (and 1 jumper link) Via RSSI/PGM pin 1200 baud modem 3.7V-15, 18mA 65dB-70dB -118dBm TLC2/RLC2 Data Sheet Footprint Frequency band Channels Channel select switches Parallel channel select SAW front end filter Serial Frequency programming Modem Supply Spurii Sensitivity Radiometrix Ltd RLC2 Industry standard 433 - 435 MHz 32 parallel/serial Not available 4 pins (and 1 jumper link) Yes via S0/PGM pin Not available 3.7V-15, 20mA <-60dB -120dBm page 9 Antenna requirements Three types of integral antenna are recommended and approved for use with the module: A) Whip This is a wire, rod ,PCB track or combination connected directly to RF pin of the module. Optimum total length is 16.4cm (1/4 wave @ 433MHz). Keep the open circuit (hot) end well away from metal components to prevent serious de-tuning. Whips are ground plane sensitive and will benefit from internal 1/4 wave earthed radial(s) if the product is small and plastic cased Wire coil, connected directly to RF pin, open circuit at other end. This antenna is very efficient given it's small size (20mm x 4mm dia.). The helical is a high Q antenna, trim the wire length or expand the coil for optimum results. The helical de-tunes badly with proximity to other conductive objects. A loop of PCB track tuned by a fixed or variable capacitor to ground at the 'hot' end and fed from RF pin at a point 20% from the ground end. Loops have high immunity to proximity de-tuning. B) Helical C) Loop Ultimate performance Easy of design set-up Size Immunity proximity effects Range open ground to similar antenna A whip *** *** * * 500m B helical ** ** *** ** 200 C loop * * ** *** 100 The antenna choice and position directly controls the system range. Keep it clear of other metal in the system, particularly the 'hot' end. The best position by far, is sticking out the top of the product. This is often not desirable for practical/ergonomic reasons thus a compromise may need to be reached. If an internal antenna must be used, try to keep it away from other metal components, particularly large ones like transformers, batteries and PCB tracks/earth plane. The space around the antenna is as important as the antenna itself. 0.5 mm enameled copper wire close wound on 3.2 mm diameter former RF 433 MHz = 24 turns A. Helical antenna Feed point 15% to 25% of total loop length RF-GND C2 C3 C4 C1 track width = 1mm 4 to 10 cm inside area 2 RF B. Loop antenna 16.4cm wire, rod, PCB-track or a combination of these three RF C. Whip antenna 433 MHz = 16.4 cm total from RF pin. Figure 7: Antenna types Radiometrix Ltd TLC2/RLC2 Data Sheet page 10 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/licensing/licensing_policy_manual/ 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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