radiometrix ltd LMT3 data sheet page 1 features conforms to en 300 220-3 and en 301 489-3 pll synthesizer with tcxo data rates up to 5 kbps for standard module usable range over 500m @ 25mw fully screened, low profile low power requirements applications social alarm 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 social alarm frequencies: ch0: 869.2125mhz, ch1: 86 9.2375mhz custom frequency within 865mhz - 870mhz 32 channels transmit power: +10dbm (10mw) / +14dbm (25mw) supply range: 3.1 ? 15v (tx @ 10mw), 4.1 ? 15v (tx @ 25mw) current consumption: 34ma @ 10mw, 68ma @ 25mw data bit rate: 5kbps max. (standard module) serial configuration by inverted rs232 at 3v cmos l evel evaluation platforms : nbek + lm series carrier matching receiver: cor3-869-5 the LMT3 is a 25khz channel narrowband multichannel transmitter offering up to 25mw rf power. LMT3 can be paired with the category 1 compliant receiver intended for european 869.2- 869.25mhz social alarm application. it can also be used for any 868 - 870mhz band non- specific srd applications. the module offers a low power, reliable data link in an industry- standard pin out and footprint. figure 1: LMT3 transmitter nbfm multi-channel transmitter for 868mhz srd band hartcran house, 231 kenton lane, harrow, middlesex, ha3 8rp, england tel: +44 (0) 20 8909 9595, fax: +44 (0) 20 8909 223 3, www.radiometrix.com issue 1, 22 january 2013 LMT3
radiometrix ltd LMT3 data sheet page 2 figure 2: LMT3 block diagram
radiometrix ltd LMT3 data sheet page 3 figure 3: LMT3 footprint (top view) pin description ? LMT3 pin name function 1a vcc 3.1 ? 15v power supply (@ 10mw) 4.1 ? 15v power supply (@ 25mw) 2a 0v ground 3a txe transmit enable (active low) 4a txd dc coupled input for 3v cmos logic. r in =47k 5a no pin not present in LMT3 1b p0/pgm parallel channel select lsb serial frequency programming / configuration 1 2b p1 parallel channel select 3b p2 parallel channel select 4b p3 parallel channel select msb 5b no pin not present in LMT3 notes: 1. serial programming is by an inverted, cmos logic level, 2400 baud rs232 datastream applied to the p0 pin. 2. channel select inputs have pullups (50k ) to 3v internal rail. do not exceed 3v logic level s on this port. 3. channel select inputs are active low 4. txe has a 100k pullup to vcc 5. all pins are on an 0.1" grid 6. the pins 5a/b are not present, but are included in footprint for compatibility with other units in this family 7. in the 'off' state a pin switch open circuits th e rf output pin. there are no 'off' state spuri. 8. 10mw unit will operate (with marginally reduced specifications and lower (6-8mw) output power) from a 3.0v rail. this must be well regulated and w ithout noise or ripple, as in this state the unit's internal regulator no longer operates, and provides no supply rejection.
radiometrix ltd LMT3 data sheet page 4 serial interface commands 2400 baud rs232. 8 bit data, no parity, 1 start bi t, 1 or 2 stop bits. serial data is sent to the unit on one of the paral lel channel select pins (p0). it is very important that the unit does not 'decode' switch bounce in ordinary operati on as a command string, or spurious re-writing of t he e2prom will result. for this reason the user must s end the 16 character string enableserialmode (followed by a carriage return) to activate the ser ial command mode before sending any of the command strings listed below. command mode is disabled on p ower down, or on reception of a # character. to successfully program the unit, it must be enabled ( txe low). gochan aa serially select channel aa, where aa is ch0 to ch31 load aa nnnnn set value of n register for channe l aa, where aa is channels 0 to 31 setpar channel selected by 4 bit parallel inputs (c h0 to ch15 only) setser channel selected by most recent gochan opera tion rvalue rrrr set value for r register single nnnnn set value of n for single channel oper ation. n value not stored in eeprom process entry / clear all buffers # disable command mode 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) 34768 25 200 . 869 = = = khz mhz f f n cing channelspa rf tx khz mhz f f r cing channelspa tcxo 25 13 = = , so r=520 note : a pause of at least 50ms must be allowed between co mmand strings (eeprom programming time). single mode does not store the n value in eeprom. t herefore the unit is inoperative after a power down until either another valid single comm and is received, or mode is changed by a gochan, setpar or setser command. single mode is intended for frequency agile applications. if an n value greater than 65535 is needed then an offset of +65536 can be selected by setting bit 15 of the r value high (the n value is then reduced by 65536 of course)" example: fout = 869.2125 fcomp = 12.5khz n = 69537 this exceeds 65535, so: bit 15 of r is set : rvalue 33808 65536 is subtracted: load00 4001
radiometrix ltd LMT3 data sheet page 5 condensed specifications frequency social alarm (sal) variant: ch0: 869.2125mhz, ch1: 869.2375mhz user customisable frequencies: 865mhz ? 870mhz frequency stability 1.5khz channel spacing 25khz number of channels 16 channels controlled by parallel port or 32 via rs232 interface operating temperature -10 oc to +60 oc (storage -3 0 oc to +70 oc) spurious radiations compliant with etsi en 300 220- 3 and en 301 489-3 transmitter output power +10dbm (10mw) 1db +14dbm (25mw) 1db peak deviation 3khz tx on switching time 30ms from txe transition modulation type fsk (f3d) tx modulation bandwidth dc ? 5khz (3v cmos compatib le) adjacent channel tx power <-37dbm tx spurious <-45dbm (no rf output in standby) supply voltage 3.1v ? 15v (10mw) 4.1 ? 15v (25mw) current 34ma @ 10mw (nominal) 68ma @ 25mw (nominal) <5 a standby (txe high or floating) inputs data (cmos/ttl compatible) size 33 x 23 x 9mm interface user 10 (8) pin 0.1" pitch dual row (5+5) header rf 2pin 0.1? pitch recommended pcb hole size 1.2mm ordering information: part no. frequency (mhz) rf power (mw) channel spacing (khz) data rate (kbps) LMT3-869.2125-5 869.2125 10 25 5 LMT3-869-5-sal 869.200 - 869.250 10 25 5 LMT3-869-5 868 - 870 10 25 5 LMT3-869-5-25mw 868 - 870 25 25 5 matching cor3 receiver part number frequency module mounting pins cor3-869.2125-5-h 869.2125mhz horizontal mounting, perpendicular pins rf, rfgnd, rssi, gnd, vcc, af, rxd cor3-869-5-sal 869.2-869.25mhz vertical mounting, parallel pins rf, rfgnd, rssi, gnd, vcc, af, rxd p0/pgm cor3-869-5-sal-h 869.2-869.25mhz horizontal mounting, perpendicular pins rf, rfgnd, rssi, gnd, vcc, af, rxd p0/pgm cor3-869-5 868-870mhz vertical mounting, parallel pins rf, rfgnd, rssi, gnd, vcc, af, rxd p3, p2, p1, p0/pgm
radiometrix ltd LMT3 data sheet page 6 appendix [mw] [mhz] rf power [erp] 10 100 500 600khz 500khz 250khz 300khz 25mw 25mw cept/erc rec 70-03, 868 mhz band plan applications channel spacing duty cycle 5mw 500mw 10mw 100khz 868.0 868.60 868.70 869.20 869.25 869.30 869.65 869.40 870.0 869.70 <1% or lbt no spacing non-specific srd non-specific srd non-specific srd no spacing up to 100% <0.1% or lbt <1% <10% or lbt <10% no spacing 25khz or wide band 25khz alarm alarm <1% 25khz or wb alarm social alarm 10mw 25khz <0.1% 100khz 25mw 10mw 50khz 50khz 10mw non-specific srd 25khz 50khz
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 co pyrighted 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 bel ieved 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 lt d does not assume any liability arising from the application or use of any product or circuit descri bed herein, nor for any infringements of patents or other rights of third parties which may result from the u se of its products. this data sheet neither states nor implies warranty of any kind, including fitness for any particular application. these radio devices ma y 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 particula r equipment. further details are available on the office of comm unications (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
|
