Operational Description

FCC ID: NTAXMETER10

Operational Description

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FCCID_695379

Telematics Wireless Proprietary FCC ID:NTAXMETER10 LC-TMW RF Specification Rev V1 LC-TMW Rev 1.0 Page 0 of 9

Telematics Wireless Proprietary FCC ID:NTAXMETER10 Table Of Content 1. INTRODUCTION .......................................................................................................................... 0 1.1. DEFINITIONS, ABBREVIATION AND ACRONYMS ........................................................................ 0 2. LC-TMWDESCRIPTION ............................................................................................................. 0 2.1. BLOCK DIAGRAM ...................................................................................................................... 0 2.2. OPERATIONAL MODES............................................................................................................... 0 2.3. BOARD DIMENSION ................................................................................................................... 0 3. ELECTRICAL PERFORMANCE ............................................................................................... 0 3.1. TRANSMIT UNIT ........................................................................................................................ 0 3.1.1. Transmit Parameters ......................................................................................................... 0 3.2. RECEIVE UNIT ........................................................................................................................... 0 3.2.1. Receive Parameters........................................................................................................... 0 3.3. ANTENNA .................................................................................................................................. 0 3.4. POWER SOURCE ......................................................................................................................... 0 3.5. ENVIRONMENTAL CONDITIONS ................................................................................................. 0 LC-TMW Rev 1.0 Page 0 of 9

Telematics Wireless Proprietary FCC ID:NTAXMETER10 1. Introduction The following document describes the technical specification of a Low Cost Water Meter transceiver board (called LC-TMW) for the USA market. The LC-TMW is actually a water odometer, offering Automatic Meter Reading – AMR. The LC-TMW transmits its meter readings via RF to a collecting unit. In addition specific parameters can be programmed via the RF link. The LC-TMW operates at the 900MHz ISM band. The board consists of the following units: RF Transmitter & Receiver with integral Antenna and a Microcontroller (plus simple Digital Logic), which control the operational modes of the unit. 1.1. Definitions, Abbreviation and Acronyms RFD : RF Dialog LC-TMW Rev 1.0 Page 0 of 9

Telematics Wireless Proprietary FCC ID:NTAXMETER10 2. LC-TMWDescription 2.1. Block Diagram A block diagram of the LC-TMW is described below. Battery 2.7 - 3.6V LC-TMW Rx Control Meter RF Interface RxD Recceiver Antenna LO 916.3MHz Digital Micro Control Controller Logic 916.3MHz RF Transmitter TxD Tx Control Clock Clock Generator Generator 32768Hz 26.6353MHz Figure 1: LC-TMW Block Diagram LC-TMW Rev 1.0 Page 0 of 9

Telematics Wireless Proprietary FCC ID:NTAXMETER10 2.2. Operational Modes LC-TMW Operational Modes Mode Microcontroller IR Digital RF RF Interface Logic Receiver Transmitter Transmit On (fast clock) Off On Off On Receive On (fast clock) Off On On Off Idle/Sleep On (32768Hz clock) Off Off Off Off 2.3. Board Dimension Figure 2: Board Dimension LC-TMW Rev 1.0 Page 0 of 9

Telematics Wireless Proprietary FCC ID:NTAXMETER10 3. Electrical Performance 3.1. Transmit Unit 3.1.1. Transmit Parameters FSK Transmit Parameters Parameter Value Transmit Frequency 916.3 MHz Modulation Digital Modulation – Wide Band BFSK Modulation Coding Manchester Bit rate (net data rate) ~60kbps Frequency deviation 190 kHz Bandwidth (@6dB) 500kHz – 700kHz Frequency stability (including initial <50 ppm stability, temperature and aging) Peak Output power (without Antenna) < 12dBm Peak Output power spectral density < 8dBm (without Antenna) in any 3kHz Harmonics < - 54dBm Tx Pulse duration ~4ms Transmission duty cycle Programmable. Less than 0.12% LC-TMW Rev 1.0 Page 0 of 9

Telematics Wireless Proprietary FCC ID:NTAXMETER10 3.2. Receive Unit 3.2.1. Receive Parameters Receive Parameters Parameter Value Receive frequency 916.3 MHz Sensitivity (BER 1E-3) -90 dBm Modulation FSK Frequency deviation 190 kHz Bit rate ~20 kbps Coding Manchester LC-TMW Rev 1.0 Page 0 of 9

Telematics Wireless Proprietary FCC ID:NTAXMETER10 3.3. Antenna The LC-TMW has an integral Antenna (kind of Inverted Antenna). The Antenna is Omni Directional in horizontal plane. The max gain is 3dBi. 3.4. Power Source Battery rated voltage 3.6V. Operating voltage: 2.7-3.6V LC-TMW Rev 1.0 Page 0 of 9

Telematics Wireless Proprietary FCC ID:NTAXMETER10 3.5. Environmental Conditions Operating Temperature: -40° C to + 85° C Storage Temperature: -40° C to +85° C Humidity: Up to 95% LC-TMW Rev 1.0 Page 0 of 9


Document Created: 2006-08-15 10:13:43
Document Modified: 2006-08-15 10:13:43
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