Datasheet > TDH2R-433-4

TDH2R-433-4

更新时间： 2025-09-01 03:28:27

品牌	Logo	应用领域
RADIOMETRIX		调制解调器无线
页数	文件大小	规格书
11页	351K
描述
UHF Multi Channel Hi Power Radio Modem

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TDH2R-433-4 数据手册

Radiometrix

Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England

Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233

Issue 2, 06 October 2006

TDH2

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.

Figure 1: TDH2-433-9 radio modem

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

Radiometrix Ltd

TDH2 Data Sheet

page 1

12 3 4 5 6 7...11

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