전자부품 데이터시트 검색엔진 |
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TDH2R-433-9 데이터시트(PDF) 1 Page - Radiometrix Ltd |
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TDH2R-433-9 데이터시트(HTML) 1 Page - Radiometrix Ltd |
1 / 11 page Radiometrix Ltd TDH2 Data Sheet page 1 Provided no two devices attempt to transmit simultaneously no further restrictions on data transmission need be made, as all transmit timing, valid data identification and datastream buffering is conducted by the unit. Synchronisation and framing words in the packet prevent the receiver outputting garbage in the absence of wanted RF signal or presence of interference. For multiple radio systems (polled networks) a TDH2 can be set to 1 of 8 unique addresses. As well as having unique addresses, the TDH2 allows operation on one of 5 pre-set frequencies in the 433MHz band. These frequencies are non-overlapping and simultaneous operation of TDH2s in the same area on different channels will be possible. Units are supplied on 433.925MHz (Ch0) as default. Features • Conforms to Australian/New Zealand AS/NZS 4268:2003 • High quality, stable crystal reference • Low noise synthesiser / VCO • SAW front-end filter and multi-stage ceramic IF filtering • Single conversion superhet • Serial modem baud rate at 9600bps (half-duplex) • Addressable point-to-point • 5 serial select wideband channels • Available as TDH2T transmitter and TDH2R receiver for one way communication Applications • PDAs, organisers & laptops • Handheld / portable terminals • EPOS equipment, barcode scanners • In-building environmental monitoring and control • Remote data acquisition system, data logging • Fleet management, vehicle data acquisition Technical Summary • Operating frequency: 433.925MHz (default) • Modulation: 16kbps bi-phase FSK • Supply: 5V at 50mA transmit, 22mA receive/idle • Transmit power: +14dBm (25mW) • Receiver sensitivity: -105dBm (for 1% BER) • 32 byte data buffer • Adjacent channel rejection: 60dB @ ±320kHz UHF Multi Channel Hi Power Radio Modem UHF Multi Channel Hi Power Radio Modem UHF Multi Channel Hi Power Radio Modem UHF Multi Channel Hi Power Radio Modem The TDH2 is a 9600baud half-duplex multi channel OEM radio modem with a power output of 25mW. It is a 100% pin-compatible drop-in replacement for the Radiometrix TDL2A and can be used to replace the TDL2A in applications where greater radiated power is desired. TDH2 acts as a transparent serial cable to attached host. TDH2 is an intermediate level OEM radio modem which is in between a raw FM radio module like BiM2 and a sophisticated OEM radio modem like SPM2. It takes care of preamble, synchronisation, bit balancing and error checking along with automatic noise squelching. Radiometrix Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England Issue 2, 06 October 2006 TDH2 NE W Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233 Figure 1: TDH2-433-9 radio modem |
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