CDMA module

Product Description

CDMA Module Application Descriptions
The CDMA Wireless Data Module is a complex consumer communications instrument that relies
heavily on both digital signal and embedded processor technologies. The Wireless Data Modules
manufactured by AnyDATA.NET support Code-Division Multiple Access (CDMA). This operates in
the cellular spectrum band.
In a continuing effort to simplify the design and to reduce the size and production cost of the
Wireless Data Module, AnyDATA.NET has successfully developed the DTG series. The DTGS-800 is
AnyDATA.NETs latest compact Wireless Data Module operating in the Cellular spectrum band. The
DTGS-800 contains not only a complete digital modulation and demodulation system for CDMA
standards as specified in IS-95 A/B and IS-2000, but also GPSOne position location solution which offers
wireless callers their location wherever and whenever they need it.
GPSOne is QUALCOMM CDMA Technologies position location solution. It offers the availability
of position location determination in hostile environments (such as indoors) where conventional
GPS receivers do not work well.
GPSOne uses a hybrid approach that utilizes signals from the GPS satellite constellation and from
CDMA cell sites to determine location. Using the hybrid approach, GPSOne enhances location
services availability, accelerates the location determination process, and provides improved
accuracy.
The hybrid mode approach for position location uses signals from CDMA cell stations and GPS
satellites to compute the users location. This approach basically takes advantage of an accurate
knowledge of GPS system timing on a CDMA mobile station. The knowledge of system timing
allows the GPSOne solution to use both the CDMA signal measurements and GPS signal
measurements collectively to compute the users location. It also allows for a central entity, named
Position Determination Entity (PDE), to send estimated signal phases to the mobile. This knowledge
reduces the time to search the satellite pseudo ranges on the mobile, thus improving the time taken to
determine the users position.
The subsystem in the DTGS-800 includes a CDMA processor (MSM6050), an integrated CODEC
with an ear piece and microphone amplifiers, and an RS-232 serial interface supporting forward link data
AnyDATA.NET Inc. AnyTime AnyPlace Any Wireless Data SolutionTM
All Rights Reserved. AD-2001-06-28 Ver 1.1
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communications at a rate of 153kbps.
The DTGS-800 provides an external interface that includes the standard RS-232, Digital Audio,
External reset control, parallel LCD Display, Keypad, Ringer extension ports and R-UIM for China
market.
The DTGS-800 has the capability to power down unused circuits in order to dynamically minimize
power consumption.

2.2.1 General Specifications
Parameters Descriptions
External Access Code-Division-Multiple-Access (CDMA)
CDMA Protocol IS-95 A/B, IS-98A, IS-126, IS-637A, IS-707A, IS-2000
Data Rate 153.6Kbps max
Transmit/Receive Frequency Interval 45MHz for Cellular
Vocoder EVRC, 13kQCELP
RF technology Zero Intermediate Frequency
Number of Channel 832 for Cellular
Operating Voltage VBATT_INT : +4.0V ±10%
VEXT_DC : +4.5V±10%
Current Consumption Stand by mode: Idle (90mA), Sleep (less than 1mA)
Busy mode: About 520mA
Operating Temperature -30ºC ~ +60ºC
Frequency Stability ±300Hz for Cellular
Antenna GSC Connector, 50ohm
Size 53 X 33 X 2.7mm with case
Weight About 15g
External Interface RS-232s, Digital/Analog Audios, LCD, Keypad, Ringer
External Reset Control, R-UIM, MP3, MIDI, GPIOs, USB
User Interface Software BREW support
Additional Function GPSOne position location solution