Telematics Witreless Proprietary FCC ID:NTAEMMR1 EMMR Specification Rev V1 Operational_description_16 373_rev1.doc March 22, 2005 Page 0 of 10 Telematics Witreless Proprietary FCC ID:NTAEMMR1 Table Of Content 1. INTRODUCTION ..........................................................................................................................3 1.1. DEFINITIONS, ABBREVIATION AND ACRONYMS ........................................................................3 2.2.1. 2. EMMR DESCRIPTION ................................................................................................................4 2.1. BLOCK DIAGRAM ......................................................................................................................4 2.2. OPERATIONAL MODES...............................................................................................................5 Software and FPGA Downloading ...................................................................................5 2.3. BOARD LAYOUT AND SIZE ........................................................................................................5 3. ELECTRICAL PERFORMANCE ...............................................................................................5 3.1. RECEIVE UNIT ...........................................................................................................................5 3.2. TRANSMIT UNIT ........................................................................................................................5 PSK Transmit Mode..........................................................................................................5 FSK Transmit Mode..........................................................................................................5 Antenna.............................................................................................................................5 3.3. ENVIRONMENTAL CONDITIONS .................................................................................................5 3.2.1. 3.2.2. 3.2.3. Operational_description_16 373_rev1.doc March 22, 2005 Page 0 of 10 Telematics Witreless Proprietary FCC ID:NTAEMMR1 Introduction The following document describes the technical specification of the Enhanced Meter &
Monitoring Reader (called EMMR) for the USA market. The EMMR is a compact RF Receiver/Transmitter unit operates at 900MHz ISM band
(multi frequency). The EMMR is used for wireless data collection (transmitted from water meters). Following the data collection, the collected data is transmitted via the RF Transmitter to another EMMR Definitions, Abbreviation and Acronyms TBD 1. 1.1. Operational_description_16 373_rev1.doc March 22, 2005 Page 0 of 10 Telematics Witreless Proprietary FCC ID:NTAEMMR1 EMMR Description Block Diagram A block diagram of the EMMR is described below. 2. 2.1. Solar Power 5V - 18V Ext. Battery In Charger Supply 10 -18V Charger
Power Supply EMMR Power Supervisor
Timer 32768Hz Int. Lithium Battery 7.2V Clock Generator 12MHz DSP FPGA USB Interface Rx Control I Q RF I&Q Receiver LO1 = 834-855MHz LO2 = 766MHz LO3 = 836MHz RF Transmitter
(PSK/FSK) TxD Tx Control Antenna T/R SW 905.44-- 923.55 MHz RS232 Interface Clock Generator 14.487 MHz P D N D D x T D x R March 22, 2005 Page 0 of 10 Operational_description_16 373_rev1.doc Telematics Witreless Proprietary FCC ID:NTAEMMR1 Figure 1 - EMMR Block Diagram Operational Modes The EMMR has 3 operational modes:
Power Down Mode The unit is switched off except the Timer. The Timer shall wake the unit when its time expired. The sleep time (power down) is programmable. Receive Mode The Receiver is enabled and collects data transmitted by water meters.. The received data is decoded and saved in the internal memory or transmitted via the RS232/USB to external PC/Lap Top/Pocket PC. Transmit Mode The Transmitter is enabled. The data collected during receive is transmitted towards the Concentrator. Mode Transmit Receive Power Down
(Timer mode) DSP On On Off Digital Logic On On Off Power Supervisor
+ Timer On On On RF RF Receiver Transmitter Off On Off On Off Off 2.2. 2.2.1. Software and FPGA Downloading By connecting the EMMR to a PC via their USB interface, software and FPGA files can be downloaded into the EMMR. Operational_description_16 373_rev1.doc March 22, 2005 Page 0 of 10 Telematics Witreless Proprietary FCC ID:NTAEMMR1 2.3. Board Layout and Size Antenna Connector Charge LED DC In 12V Indication LED On/Off Battery Conn. AutoReader Conn. Internal Rechargeable Battery Solar In USB PWR Out Comm/RS232 Operational_description_16 373_rev1.doc March 22, 2005 Page 0 of 10 Telematics Witreless Proprietary FCC ID:NTAEMMR1 Figure 2 - Board Layout Electrical Performance Receive Unit Table 1 Receive Parameters Parameter Receive frequency Sensitivity (BER 1E-3) Modulation Bit rate Chip rate Bandwidth (@6dB) Frequency stability (including initial stability, temperature and aging) Value Programmable in the range 905.44 MHz 923.55 MHz
-114dBm DPSK DSSS
~60 kbps
~900 kChip/sec 800 kHz 1100kHz
<15 ppm 3. 3.1. Operational_description_16 373_rev1.doc March 22, 2005 Page 0 of 10 Telematics Witreless Proprietary FCC ID:NTAEMMR1 Transmit Unit The EMMR transmit unit has two operational mode (selected by the software):
PSK Mode FSK Mode PSK Transmit Mode Table 2 PSK Transmit Parameters Parameter Transmit Frequency Modulation Bit rate Chip rate Bandwidth (@6dB) Frequency stability (including initial stability, temperature and aging) Peak Output power (without Antenna) Peak Output power spectral density
(without Antenna) Harmonics Value Programmable in the range 905.44 MHz 923.55 MHz DSSS BPSK
~60 kbps
~900 kChip/sec 800 kHz 1100kHz
<15 ppm 19.93 dBm
<8dBm in any 3kHz
< - 54dBm 3.2. 3.2.1. Operational_description_16 373_rev1.doc March 22, 2005 Page 0 of 10 Telematics Witreless Proprietary FCC ID:NTAEMMR1 3.2.2. FSK Transmit Mode Table 3 FSK Transmit Parameters Parameter Transmit Frequency Modulation Modulation Coding Bit rate (net data rate) Frequency deviation Bandwidth (@6dB) Frequency stability (including initial stability, temperature and aging) Peak Output power (without Antenna) Peak Output power spectral density
(without Antenna) Harmonics Value Programmable in the range 905.44 MHz 923.55 MHz Digital Modulation Wide Band BFSK Manchester
~40 kbps 190 kHz 550kHz 650kHz
<15 ppm
<20dBm
<8dBm in any 3kHz
< - 54dBm Operational_description_16 373_rev1.doc March 22, 2005 Page 0 of 10 3.2.3. Telematics Witreless Proprietary FCC ID:NTAEMMR1 Antenna Antenna gain: maximum 3dBi (excluding cable lose). There is no direct access to the antenna connector of the unit. In order to connect the antenna, special plastic cover of the connector should be removed by extracting two screws holding the cover. After connecting the antenna, the cover should be returned to its original position (using the same screws) with antenna connector covered completely by the cover. The connection of the antenna shall be performed only by professional personnel responsible for the operating of the unit. 3.3. Environmental Conditions Operating Temperature: -30 C to + 85 C Storage Temperature: -40 C to +85 C Humidity: Up to 95%
Operational_description_16 373_rev1.doc March 22, 2005 Page 0 of 10