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Summary of Contents for AnyDATA DTS-800 CDK
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SERVICE MANUAL CDMA Development Kit DTS-800 CDK AnyDATA.NET Inc. Hanvit Bank B/D 7F Byulyang-dong Kwachon KOREA Tel) 82-2-504-3360 Fax) 82-2-504-3362...
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AnyDATA.NET Inc. assumes no responsibility for any damage or loss resulting from the misuse of its products. AnyDATA.NET Inc. assumes no responsibility for any loss or claims by third parties, which may arise through the use of its products. AnyDATA.NET Inc. assumes no responsibility for any damage or loss caused by the deletion or loss of data as a result of malfunctions or repairs.
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Operating Requirements The user can not make any changes or modifications not expressly approved by the party responsible for compliance, otherwise it could void the user's authority to operate the equipment. To satisfy FCC RF exposure compliance requirements for a mobile transmitting device, this device and its antenna should generally maintain a separation distance of 20cm or more from a person’s body.
General Introduction ............................2 CHAPTER 1. System Introduction 1. System Introduction ......................3 2. Features and Advantages of CDMA Module ..............4 3. Structure and Functions of CDMA Module ..............7 4. Specification ........................8 CHAPTER 2. NAM Input Method(Inputting of telephone numbers included) 1.
General Introduction The DTS-800 CDK functions digital cellular module worked in CDMA (Code Division Multiple Access) mode. CDMA type digital mode applies DSSS (Direct Sequence Spread Spectrum) mode which is used in military. This feature enables the phone to keep communication from being crossed and use one frequency channel by multiple users in the same specific area, resulting that it increases the capacity 10 times more compared with that in the analog mode currently used.
DTS-800 CHAPTER 1. System Introduction 1. System Introduction 1.1 CDMA Abstract The cellular system has a channel hand-off function that is used for collecting the information on the locations and movements of radio mobile telephones from the cell site by automatically controlling several cell site through the setup of data transmission routes and thus, enabling one switching system to carry out the automatic remote adjustment.
2. Features and Advantages of CDMA Module 2.1 Various Types of Diversities In the CDMA broadband modulation(1.25MHz band), three types of diversities (time, frequency, and space) are used to reduce serious fading problems generated from radio channels in order to obtain high-quality calls. Time diversity can be obtained through the use of code interleaving and error correction code whereas frequency diversity can be obtained by spreading signal energy to more wider frequency band.
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2.3 Voice Encoder and Variable Data Speed The bi-directional voice service having variable data speed provides voice communication which employs voice encoder algorithm having power variable data rate between the mobile telephone cell site and mobile station. On the other hand, the transmit voice encoder performs voice sampling and then, creates encoded voice packets to be sent out to the receive voice encoder, whereas the receive voice encoder demodulates the received voice packets into voice samples.
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increased by three times. 2.7 Soft Capacity The subscriber capacity of CDMA system is flexible depending on the relation between the number of users and service classes. For example, the system operator can increase the number of channels available for use during the busy hour despite the drop in call quality.
3. Structure and Functions of CDMA Module The mobile station of CDMA system is made up of a radio frequency part and logic/control (digital) part. The mobile station is fully compatible with the existing analog FM system. The mobile station antenna is connected with the transmitter/receiver via a duplexer filter so that it can carry out the transmit/receive function at the same time.
4. Specification 4.1 General Specification 4.1.1 Transmit/Receive Frequency Interval : 45 MHz 4.1.2 Number of Channels (Channel Bandwidth) CDMA : 20 CH (BW: 1.23MHz) 41.3 Operating Voltage : DC 6V 4.1.4 Operating Temperature : -30° ° ° ° ~ +60° ° ° ° 4.1.5 Frequency Stability : ±300 Hz 4.1.6 Antenna : Whip antenna, 50 Ω...
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4.3 Transmit Specification 4.3.1 Frequency Range 824.04 MHz ~ 848.97 MHz 4.3.2 Local Oscillating Frequency Range : 966.88 MHz±12.5 MHz 4.3.3 Intermediate Frequency : 130.38 MHz 4.3.4 Output Power : 0.32W 4.3.5 Interference Rejection 1) Single Tone : -30dBm at 900 kHz 2) Two Tone : -43dBm at 900 kHz &...
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4.4 MS (Mobile Station) Transmitter Frequency FA NO. CH.NO. CENTER FREQUENCY FA NO. CH.NO. CENTER FREQUENCY 1011 824.640 MHz 837.120 MHz 825.870 MHz 838.350 MHz 827.100 MHz 839.580 MHz 828.330 MHz 840.810 MHz 829.560 MHz 842.04 MHz 830.790 MHz 843.270 MHz 832.020 MHz 844.500 MHz 833.250 MHz...
CHAPTER 2. NAM Input Method 1.INSTALLATION METHOD...
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1) Connect the MODEM to 60pin connector of Level Translator. 2) Supply the voltage of 5~7V to small or large jack of Level Translator. 3) Switch the power on. 4) Connect the UART1 to PC COM1 port with the RS-232C cable. Install the operating program.
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4) If OK is displayed in the message box, modem is now ready for ommunication with PC. 5) Click MENU BAR icon.
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Repeat step 1 through 5, or reset the power of modem and repeat step 1 through 5) 7) Type NAM Programming script like the example shown below, <NAM Programming script example> Mode offline-d [ENTER] nv_write name_nam {0," AnyDATA telecom "} [ENTER] nv_write name_nam {1," AnyDATA telecom "} [ENTER] Mode reset [ENTER]...
CHAPTER 3. Circuit Description 1. Overview IRT3000 receives modulated digital signals from the MSM of the digital circuit and then, changes them into analog signals by the digital/analog converter (DAC, D/A Converter) in order to create baseband signals. Created baseband signals are changed into IF signals by IFT3000 and then, fed into the Mixer after going through AGC.
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temperature. 2.3. Upconverter (U104) Upconverters made up of a mixer part and Driver AMP part. The mixer part is used to receive double-balanced OUT+ and OUT- of transmit AGC from baseband and mix the output of VCO (U171) with UHF output signal, whereas the Amp part is used to buffer the output of this mixer.
2.6. Description of Frequency Synthesizer Circuit 2.6.1 Voltage Control Temperature Compensation Crystal Oscillator(U174, VCTCXO) The temperature range that can be compensated by U174 which is the reference frequency generator of mobile terminal is -30 ~ +80 degrees. U174 receives frequency tuning signals called TRK_LO_ADJ from MSM as 0.5V~2.5V DC via R and C filters in order to generate the reference frequency of 19.68MHz and input it into the frequency synthesizer of UHF band.
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3.2 Configuration 3.2.2 Voice Processing Part The voice processing part is made up of an audio codec into digital voice signals and digital voice signals into analog voice signals, amplifying part for amplifying the voice signals and sending them to the ear piece, amplifying part that amplifies ringer signals coming out from MSM3000, and amplifying part that amplifies signals coming out from MIC and transferring them to the audio processor.
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Receptacle Ringer FLASH Memory & SRAM Earpiece AUDIO Processor EEPROM Power Supply [Figure 3-1] Block Diagram of Digital/Voice Processing Part 3.3.2 Audio Processing Part MIC signals are amplified through the audio codec which is U401 (TWL1103), and converted into digital signals. Then, they are inputted into MSM3000.
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Data created thus are 4-phase modulated by one pair of Pilot PN code and they are used to create I and Q data. When received, I and Q data are demodulated into symbols by the demodulator and then, de-interleaved in reverse to the case of transmission.
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Flash ROM is used to store the terminal’s program. Using the down-loading program, the program can be changed even after the terminal is fully assembled. SRAM is used to store the internal flag information, call processing data, and timer data. 4.
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NAME DESCRIPTION CHARACTERISTIC DP_DTR/ Data Terminal Ready Host ready signal DP_RXD Receive Data Input data to the modem DP_CTS/ Clear to Send Modem output signal Signal Ground Signal ground 4.2.2 Signal level of RXD/TXD Phone MAXIM207 MSM_input = 2.8V RS232 •...
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4.4 The function of Real Audio Test( including Voice Test) NAME TYPE DESCRIPSION MIC+ Microphone audio input MIC- Ear/microphone set detect Ear audio output GND_A Audio ground...
CHAPTER 4. FCC Notice This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
APPENDIX 1. Assembly and Disassembly Diagram 2. Block & Circuit Diagram 3. Part List 4. Component Layout...
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1. Assembly and Disassembly Diagram 9pin connector (UART 1) UART 2 60 pin connector On/Off Switch DC Jack (large) Ear_Jack for DTSS DC Jack (small) DTSS Ear_Jack for DTS Ant_cable 3 pin connector M I C + E A R G N D M I C - 4 3 2 1...
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