radiometrix ltd qpx1 data sheet page 1 features compliant with fcc part 90, part 95 (murs) high performance double superhet pll synthesizer data rates up to 5 kbps for standard module usable range over 10km feature-rich interface (rssi, cd, analogue and digi tal baseband) incorporate a 1200baud dumb modem re-programmable via rs232 interface applications amateur radio multi-use radio service (murs) industrial telemetry and telecommand high-end security systems aprs systems vehicle data up/download rov/machinery controls technical summary standard operating frequency: 151mhz / 173mhz band fcc allocation (12.5khz channel) any +/-2mhz band in 135-175mhz 8 channels controlled by parallel port or via rs232 interface) transmit power: : 2 w (+33dbm) nominal (500mw and 1 watt versions available) supply range: 12v (11 ? 15v) current consumption: 600ma transmit, 30ma receive data bit rate: 5kbps max. (standard module) receiver sensitivity: -118dbm (for 12 db sinad) size: 123 x 59 x 30mm (in eas120 case - excluding c onnectors) the qpx1 transceiver module offers a 2 watt rf output vhf radio link, in a robust aluminium extruded casing. this unit is ideally suited to applications where existing lower powered transceivers provide insufficient range. the qpx1 is a multi-channel, narrowband design, suitable for licensed and unlicensed vhf allocations, fcc part 90, part 95 (murs) operation, and the 2m amateur band. figure 1: qpx1-173-5-12k5-fcc-eas 2 watt multi - channel vhf transceive r 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, 31 july 2012 qpx1
radiometrix ltd qpx1 data sheet page 2 figure 2: qpx1 footprint (top view through casing) 1 9 8 15 figure 3: db15 connector pin arrangement user interface: (eas cased version) pin name function 1 txd dc coupled input for 3v cmos logic. r in =47k 2 txe transmitter enable. low = on, open = off. 100 k pullup to (raw vin -5v) 3 af in 250mvp-p to 2.5v p-p ac coupled input. vari able gain 4 enable overall unit 'on' (high active, high volt age tolerant) 5 rssi dc level between 0.5v and 2.5v. 60db dynami c range 6 af out 200mv p-p audio. dc coupled, approx 1v bia s. muted by squelch 7 rxd open collector output of data slicer suitable for biphase codes 8 sqf carrier level squelch. open collector. on/low = no signal 9 0v ground 10 p3 parallel frequency select inputs. inverted logic, 1 0k pullups to 5v 11 p2 12 p1 13 p0/pgm serial programming/control input (inverte d logic level rs232) 9 14 pgm true rs232 input (inverter to pin 13) 15 vcc 12v dc supply (11-15v). 550ma typ. current d rain note: 1. qpx1 does not invert the sense of the data wavef orm. there is no resulting in no net link inversion between two units. a version with an inversion in the rx data path is also available 2. carrier detect mutes the af and data outputs. it can be disabled by rotating the level set trimmer fully cw. 3. there are no pullups on the open collector outpu ts. 4. the sofware incorporates a 1200baud dumb modem, compatible with that implemented in tx2m, rx2m, tr2m and smx2 radios ( i1200 tones and format ).
radiometrix ltd qpx1 data sheet page 3 5. rs232 input pins (14 and 12 ) tolerate true +/- levels. no buffering is required. 6. this is a 2 watt output product. good grounding , good quality aerials, properly mounted, and a low impedence power supply are required if full per formance is to be reliably obtained. be aware of the effect that the strong rf fields ge nerated by this device (and it's aerial) can have upon other adjacent circuitry if this is not p roperly screened, filtered or otherwise protected. regulators, sensitive analogue circuitry, and micro processors seem especially interference prone. two watts of rf at vhf can cause an unpleasant and painful burn. be careful. 7. caution: . the txd and p1-p3 inputs are not high voltage tol erant. low voltage logic, or switches to ground, are required. 8. a simple rs232 voltage tolerant transistor inver ter connects pin 14 to pgm 9. depending on the firmware, some versions use p0- p3 as parallel select. others use p0 as a programming input only, and p1-p3 as parallel input s. refer to tech support for details. 10. enable pin (4) may be tied to +vin 11. overall thermal power dissipation in normal use is around 4 watts, rising to 6-7 watts under aerial fault conditions. 12. this design uses the smx1 mk2 transceiver rf bo ard as an internal component 13. for visual reference, this unit uses an evatron -type reas120 extrusion figure 4: qpx1 footprint (pcb mounted version) user interface (pcb mounted version) pin name function 1 gnd ground 2 pgm programming input from 5v ttl uart tx (invert ed rs232) output 3 p1 parallel frequency select inputs. inverted logic, 1 0k pullups to 5v 4 p2 5 p3 6 txd dc coupled input for 3v cmos logic. r in =47k 7 txe transmitter enable. low = on, open = off. 100 k pullup to (raw vin -5v) 8 gnd ground 9 vcc 12v dc supply (11-15v). 550ma typ. current dr ain 10 af in 250mvp-p to 2.5v p-p ac coupled input. var iable gain 11 enable overall unit 'on' (high active, high vol tage tolerant) 12 rssi dc level between 0.5v and 2.5v. 60db dynam ic range 13 af out 200mv p-p audio. dc coupled, approx 1v bi as. muted by squelch 14 rxd open collector output of data slicer suitabl e for biphase codes 15 sqf carrier level squelch. open collector. on/lo w = no signal 16 gnd ground
radiometrix ltd qpx1 data sheet page 4 modem interface (eas cased version) the 'modem' mentioned is a 1200 baud rs232 semi-int elligent unit (transmit keyed when valid serial dat a is present, so no separate tx control needed. coding i n the datastream also permits the receiver to ignor e 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. pin name function 1 nc leave open 2 txe open = normal modem operation. low = constan t tx (for test). 10k pullup to 5v 3 nc leave open 4 enable overall unit 'on' (high active, high volt age tolerant) 5 rssi dc level between 0.5v and 2.5v. 60db dynami c range 6 af out 200mv p-p audio. dc coupled, approx 1v bia s. muted by squelch 7 nc leave open 8 nc leave open 9 0v ground 10 (tba) leave open 11 mod rxd inverted "rs232" data out (to inverting buffer like max232) 12 mod txd rs232 data input (true). 10k pullups to 5v 13 pgm inverted version of pin 14 14 pgm serial programming/control input (true rs232 ) 15 vcc 12v dc supply (11-15v). 550ma typ. current d rain modem interface (pcb mounted version) pin name function 1 gnd ground 2 pgm programming input from 2400bps, 5v ttl uart t x (inverted rs232) 3 modtxd 1200bps, 8 data bits, none parity, 1 stop bit, rs232 txd input 4 modrxd 1200bps, 8 data bits, none parity, 1 stop bit, 5v t tl uart rxd output 5 nc 6 txd dc coupled input for 3v cmos logic. r in =47k 7 txe transmitter enable. low = on, open = off. 100 k pullup to (raw vin -5v) 8 gnd ground 9 vcc 12v dc supply (11-15v). 550ma typ. current dr ain 10 af in 250mvp-p to 2.5v p-p ac coupled input. var iable gain 11 enable overall unit 'on' (high active, high vol tage tolerant) 12 rssi dc level between 0.5v and 2.5v. 60db dynam ic range 13 af out 200mv p-p audio. dc coupled, approx 1v bi as. muted by squelch 14 rxd open collector output of data slicer suitabl e for biphase codes 15 sqf carrier level squelch. open collector. on/lo w = no signal 16 gnd ground
radiometrix ltd qpx1 data sheet page 5 serial programming serial data is sent to the unit on the programming input pgm (pin 14) 2400 baud at rs232 level. 8 bit data, no parity, 1 start bit, 1 or 2 stop bits, no flow control. all c ommands must be in upper case. to successfully program the unit, 'enable' (pin 4) must be 'high' (active) to enable the unit. once 'modem' mode has been selected, the unit locks into serial command mode (and the parallel port pi ns have other functions) until a setpar command return s the unit to ordinary parallel operation. unlike earlier radiometrix multichannel units, the qpx1 (and usa versions of smx1) has separate n and r registers for each channel, on transmit and on rece ive. in other words, the frequency of each channel is individually programmed in every mode. unless a complex frequency map has been selected, a ll the r value registers are likely to be programme d with the same value command function gochan a serial select of channel a (ch0 to 7) ldtxn a nnnnn set value of n for channel a , for transmit ldrxn a nnnnn set value of n for channel a , for receive ldtxr a rrrrr set value of r for channel a , for transmit ldrxr a rrrrr set value of r for channel a , for receive setpar channel selected by 3 bit parallel input 3 setser channel selected by most recent 'gochan' ope ration rvalue rrrrr set r register value used by single command single nnnnn set value of n for single channel op eration. n value not stored in e2prom setmod enable internal modem. frequency selected by most recent 'gochan' or 'single' process entry / clear all buffers # disable command mode a = a single digit channel number from 0 to 7 nnnnn = a synthesizer n register value, (up to 655 35) rrrrr = the synthesizer r register value, (up to 16383) for transmit, r khz 10 quency channelfre n tx = for receive, r khz 10 4. 21 quency channelfre n rx ? = khz 25 hz 10 f f r cing channelspa xtal = = , so r= 400 (usually) note: in 'single' mode the unit is inoperative afte r a power down until either another valid single command is received, or mode is changed by a gochan , setpar or setser command. single mode applies a receive frequency offset of 2 1.4mhz 'single' mode is intended for frequency agile appli cations. a pause of at least 50ms must be allowed between c ommand strings (eeprom programming time)
radiometrix ltd qpx1 data sheet page 6 condensed specifications frequency 154.45625 - 154.47875mhz (12.5khz steps) ? fcc part 90 173.20375 - 173.39625mhz (12.5khz steps) - fcc part 90 general: any +/-2mhz band in 135-175mhz frequency stability 1.5khz channel spacing 25khz / 12.5khz number of channels 8 channels (controlled by parallel port or via rs23 2 interface) supply voltage 11 - 15v current 600ma nominal (800ma max.) transmit 30ma receive <5ua standby ('enable' pin low) operating temperature -10 to +55 c (storage -30 to +70 c) size in eas120 case 123 x 59 x 30mm (excluding conne ctors) 107 x 55.5 x 17mm (pcb mounted version - excluding rf connector) spurious radiations < 2nw (-57dbm) interface user 15pin d type (extrusion case version) 16 pin 0.1" pitch header (pcb mounted version) rf sma intended approval us 'part 90' approval eu en300-220 (dependant on power level) transmitter output power 2w (+33dbm) +/- 1db (500mw and 1 watt versions available) tx on switching time <50 ms (from txe transition) modulation type fsk (f3d) tx modulation bandwidth dc ? 5khz (cmos compatible , or analogue af) deviation +/- 3khz (25khz) or 1.5khz (12.5khz) adjacent channel tx power -37dbm tx spurii -36dbm inputs data (cmos/ttl compatible) receiver sensitivity -118dbm for 12db sinad image / spurious -60db blocking -84db adjacent channel -60 db outputs rssi, carrier detect, 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 d ata 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 fcc part 90.238 telemetry frequency channels (12.5k hz spacing) channels 154mhz band 173mhz band ch0 154.45625 173.20375 ch1 154.46375 173.21000 ch2 154.47125 173.23750 c h3 154.47875 173.28750 ch4 154.45625 173.31250 ch5 154.46375 173.33750 ch6 154.47125 173.36250 ch7 154.47875 173.39625
radiometrix ltd qpx1 data sheet page 7 ordering information part no. description frequency band (mhz) qpx1-154-5-12k5-fcc-eas us version in extrusion cas e 154mhz qpx1-173-5-12k5-fcc-eas us version in extrusion cas e 173mhz qpx1-xxx-5-eas standard 25khz channel in extrusion case where xxx is any vhf frequency with in 135-175mhz qpx1-154-5-12k5-fcc us version as pcb mounted 154mh z qpx1-173-5-12k5-fcc us version as pcb mounted 173mh z qpx1-xxx-5 standard 25khz channel as pcb mounted where xxx is any vhf frequency with in 135-175mhz data sheet links: http://www.radiometrix.co.uk/dsheets/qpx1.pdf http://www.radiometrix.co.uk/dsheets/smx1.pdf
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 wholeor 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
|
