NTR2 RADIOMETRIX [Radiometrix Ltd], NTR2 Datasheet
NTR2
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NTR2 Summary of contents
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... Channel spacing Longer range compared to Wide Band FM modules Available for licence-exempt operation in the 433MHz (EU) and 458MHz (UK) bands, the NTR2 modules combine effective screening with internal filtering to minimise spurious radiation and susceptibility thereby ensuring EMC compliance. They can be used in existing low data rate (<10kbps) applications where the operating range of the system using wide band transceivers need to be extended ...
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... Functional description The transmit section of the NTR2 consists of a frequency modulated Voltage Controlled Crystal Oscillator (VCXO) feeding a frequency multiplier with two stage amplifier and RF filter. Final Power Amplifier stage is factory pre-set to appropriate band power level. Operation can be controlled by the TXE line. The transmitter achieves full RF output typically within 5ms of this line being pulled low. The RF output is filtered to ensure compliance with the appropriate radio regulations and fed to the 50Ω ...
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... TBA 500 NTR2 transceiver data sheet max. units notes +60 °C +70 ° MHz kHz - 11 dBm 2 -40 dBm - dBm kHz 3 ±2.5 kHz 4 ±3.5 - F3D 5 kHz - ...
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... See applications information for further details. 8. Exceeds EN/EMC requirements at all frequencies. 9. For received signal with ±3kHz FM deviation 10. For 50:50 mark to space ratio (i.e. squarewave). Radiometrix Ltd., pin min. typ NTR2 transceiver data sheet max. units notes 0.1 ms Page 4 ...
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... NTR2 Received Signal Strength Indicator (RSSI) The NTR2 incorporates a wide range RSSI which measures the strength of an incoming signal over a range of 55dB or more. This allows assessment of link quality and available margin and is useful when performing range tests. The output on pin 3 of the module has a standing DC bias of <0.5V with no signal, rising maximum indication ...
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... Data formats and range extension The NTR2’s TXD input is normally driven directly by logic levels but will also accept analogue drive (e.g. 2- tone signalling). In this case it is recommended that TXD (pin 9) be DC-biased to 1.2V approx. with the modulation ac-coupled and limited to a maximum of 2V modulator in the NTR2 introduces some 2 predistortion of the analogue waveform ...
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... Loops are relatively inefficient but have good immunity to proximity detuning, so may be preferred in shorter range applications where high component packing density is necessary. Integral antenna summary: Feature Ultimate performance Ease of design set-up Size Immunity to proximity effects Radiometrix Ltd., whip helical loop *** ** * *** ** * * *** ** ** * *** NTR2 transceiver data sheet 2 ), tuned and Page 7 ...
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... RF 433 MHz = 24 turns Feed point 15% to 25% of total loop length track width = 1mm RF-GND inside area C1 RF wire, rod, PCB-track or a combination of these three RF 433 MHz = 16.4 cm total from RF pin. NTR2 transceiver data sheet Page 8 ...
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... Module mounting considerations The modules may be mounted vertically or bent horizontal to the motherboard. Note that the components mounted on the underside of the NTR2 is relatively fragile – avoid direct mechanical contact between these and other parts of the equipment if possible, particularly in situations where extreme mechanical stresses could routinely occur (as a result of equipment being dropped onto the floor, etc). Good RF layout practice should be observed. 50Ω ...
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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 ...