HVR2 RADIOMETRIX | Alldatasheet

Document overview

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  • PDF pages: 7

Technical content

Features

  • 433MHz version conforms to EN 300 220-3 and EN 301 489-3
  • High performance double superhet. PLL synthesizer with TCXO
  • DDC local oscillator
  • 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
  • Immune to mechanical vibration up to 500Hz

Applications

  • Heavy vehicle/machinery (e.g. crane) controls
  • 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 Technical Summary
  • Operating frequency: 433.05 - 434.775MHz
  • 32 channels
  • Supply voltage: 3.7 – 15V
  • Current consumption: 30mA (receive)
  • Data bit rate: 5kbps max.
  • Receiver sensitivity: -120dBm (for 12 dB SINAD)
  • Serial configuration by inverted RS232 at 3V CMOS level UHF Narrow Band FM Vibration Resistant Multi Channel Receiver The HVR2 receiver is the high vibration resistant version of the low cost RLC 2 receiver. Its unique local oscillator design makes the unit almost immune to mechanica l vibrations below 500Hz. This makes the HVR 2 (with the matching TLC2H-433-5 transmitter) to be used in mechanically troublesome areas such as crane and machine tool control, an d remote operated vehicles. Radiometrix Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England Issue 3, 27 April 2007 HVR2 NEW Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233 Figure 1: HVR2-433-5 receiver

Radiometrix Ltd HVR2 Data Sheet page 2 Figure 4: HVR2 block diagram

Radiometrix Ltd HVR2 Data Sheet page 3 Pin description Pin Name Function 1 Vcc DC supply (3.7V to 15V, at 30mA). 2 RSSI 0.5V-2.5V DC level. 60dB dynamic range. 40kΩ output impedance 3 0V Ground

4 RXD Open collector digital data output with internal 47kΩ pull-up to Vcc

5 AF 600mV pk-pk audio. DC coupled, approx 0.8V bias. S0/PGM Parallel channel select, bit 0 True logic (0V = low). Weak pullup to 3.5V Serial frequency programming / configuration1 S1 Parallel channel select, bit 1 True logic (0V = low). Weak pullup to 3.5V S2 Parallel channel select, bit 2 True logic (0V = low). Weak pullup to 3.5V S3 Parallel channel select, bit 3 True logic (0V = low). Weak pullup to 3.5V Jumper Parallel channel select, bit 4 Jumper is soldered (S4=0), Selects Channel 16 to Channel 31 at 50kHz step. NOTES: 1. Serial programming is by a 2400 baud inverted 'RS232' (3V CMOS levels) datastream applied to the S0 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 16-31 433.9 - 434.65 MHz (50KHz steps) ch 0-15 433.875 - 434.625 MHz (50KHz steps) Channels 00-15 cannot be accessed by the parallel port , only by a serial GOCHAN command. This format maintains compatibility with the low cost RLC2 receivers (which are supplied with their S4 jumpers unfitted therefore accessing channels 00-15). If no connection is made to the ports, the unit operates on channel 31 (434.65MHz). Figure 5: HVR2 footpint (top view)

Radiometrix Ltd HVR2 Data Sheet page 4 Serial interface commands HVR2 frequency/channel can be serially configured using HyperTerminal or any other terminal program configured with following setup: 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 (S0). 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 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. Owing to the complex nature of the DDS programming in the HVR2, the user does not have direct access to the synthesizer registers (as is the case in the simpler RLC2). Instead, the user has a table of 32 channels (accessible by parallel port, or by the GOCHAN command). Each of these channels can be assigned to one of the HVR2's pre-set frequencies (433.05 - 434.775MHz) (note: the parallel port accesses the higher 16 channels, from 16-31, as if a '5th parallel select bit' is always ‘low’). GOCHAN aa Serial select of channel aa (0 to 31) (stored in non-volatile EEPROM) HOPPER nn Temporary select of frequency number nn (0 to 69) LOAD aa nn Set a frequency (nn) for channel aa (channels 0 to 31) SETPAR Channel selected by 5 bit parallel inputs (4pins S0-S3 + S4 always high) SETSER Channel selected by most recent GOCHAN operation <cr> Process entry / Clear all buffers # Disable command mode aa = a two digit channel number from 00 to 31 (values 00-15 can only be selected by a GOCHAN command) nn= abstract ‘frequency number’ relating to one of the pre-set operating frequency Channel frequency = 433.05 + (nn x 0.025) MHz For example: nn = 01 relates to a channel frequency of 433.075MHz, and the commnd: LOAD 00 01 will set channel number 0 to 433.075MHz Note: A pause of at least 25ms must be allowed between command strings (EEPROM programming time). The HVR2 has no equivalent to the RLC2 'SINGLE' command. The 'HOPPER' command provides some similarity, but on power up (or SETPAR, SETSER or GOCHAN command) the radio reverts to ordinary operation.

Radiometrix Ltd HVR2 Data Sheet page 5 Condensed specifications Frequency 433.05-434.775MHz Frequency stability ±1.5kHz Channel spacing 25kHz Number of channels 32 channels selected via RS232 interface or 16 channels by parallel port Operating temperature -10 C to +60C (Storage -30C to +70 C) Spurious radiations Compliant with ETSI EN 300 220-3 and EN 301 489-3 Interface User 5pin 0.1" pitch molex Channel 4pin 0.1" pitch molex RF 2pin 0.1" pitch molex Sensitivity -112dBm for 1 part per 1000 BER -120dBm for 12 dB SINAD S/N ratio 25dB (min), 30dB (typ) on AF output AF bandwidth (-3dB) 4kHz image / spurious / adjacent channel <-55dB Blocking <-85dB LO re-radiation <-60dBm Supply Voltage 3.7V – 15V Current 30mA Outputs RSSI, audio, data Size 50 x 30 x 10mm Channel to channel hop <5ms Power on to valid audio <10ms Power on to stable data out (50:50 mark / space) <10ms 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 10ms period is required to stabilise data output mark/space. i.e. allow at least 10ms of preamble The high vibration resistant HVR2 receiver differ from the Low Cost RLC2 receiver in the following key features: HVR2 RLC2 Footprint Industry standard Industry standard Frequency band 433.05 – 434.775MHz 433 - 435 MHz Channels 32 serial, 16 parallel 32 parallel/serial Parallel channel select 4 pins 4 pins (and 1 jumper link) SAW front end filter Yes Yes Supply 3.7V-15, 30mA 3.7V-15, 18mA Spurii <-55dB <-60dB Sensitivity -120dBm -120dBm Ultimate S/N 25dB (min), 30dB (typical) 35dB (min), 40dB (typical) Start up time (preamble) <10ms ~50ms Channel to channel hop <5ms ~25ms Reprogramming (frequency) Limited Full Vibration resistant High, up to 500Hz Limited Local Oscillator Direct Digital Synthesiser (DDS) Voltage controlled (VCO)

Radiometrix Ltd HVR2 Data Sheet page 6 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 B) Helical 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. C) Loop 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. A B C whip helical loop Easy of design set-up * * Immunity proximity effects * * Range open ground to similar antenna 500m 200 100 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. A. Helical antenna B. Loop antenna RF C1C2 C4C3 RF-GND C. Whip antenna 16.4cm RF 0.5 mm enameled copper wire close wound on 3.2 mm diameter former

433 MHz = 24 turns

Feed point 15% to 25% of total loop length track width = 1mm 4 to 10 cm inside area wire, rod, PCB-track or a combination of these three 433 MHz = 16.4 cm total from RF pin. RF Figure 6: Antenna types

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