SERVICE MANUAL CDMA Development Kit DTS-800 CDK AnyDATA.NET Inc.
Introduction The CDMA development kit (CDK -800) is designed for the test and simulation of the CDMA wireless data communications. User can connect the development kit to your PC or Notebook and easily test the wireless communications. User can use this to develop your applications software even before user’s own hardware is ready. It also can be used as a debugging during user’s hardware test. Disclaimer and Limitation of Liability AnyDATA.NET Inc.
! 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 ......................................................................................................... 2. Features and Advantages of CDMA Module .................................................................. 3. Structure and Functions of CDMA Module .......................................
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.
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.
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. This type of function requires 40% of normal call channels in the standby mode during the handoff support, in an effort to avoid call disconnection resulting from the lack of channels.
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. The transmit frequency is the 25MHz band of 824~849MHz, whereas the receive frequency is the 25MHz band of 869~894MHz.
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 4.1.7 Size and Weight 1) Size : 102mm x 80mm x 36mm (L x W x D) 2) Weight : About 180g 4.1.8 Channel Spacing : 1.25MHz 4.2 Receive Specification 4.2.1 Frequency Range Digital : 869.04 MHz ~ 893.
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 & 1700kHz 4.3.7 CDMA TX Frequency Deviation : +300Hz or less 4.3.8 CDMA TX Conducted Spurious Emissions • 900kHz : - 42 dBc/30kHz below • 1.98MHz : - 54 dBc/30kHz below 4.3.
4.4 MS (Mobile Station) Transmitter Frequency FA NO. CH.NO. CENTER FREQUENCY FA NO. CH.NO. CENTER FREQUENCY 1 1011 824.640 MHz 11 404 837.120 MHz 2 29 825.870 MHz 12 445 838.350 MHz 3 70 827.100 MHz 13 486 839.580 MHz 4 111 828.330 MHz 14 527 840.810 MHz 5 152 829.560 MHz 15 568 842.04 MHz 6 193 830.790 MHz 16 609 843.270 MHz 7 234 832.020 MHz 17 650 844.500 MHz 8 275 833.250 MHz 18 697 845.910 MHz 9 316 834.480 MHz 19 738 847.140 MHz 10 363 835.
CHAPTER 2. NAM Input Method 1.
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. 5) Install the operating program. 2. OPERATION METHOD 1) Run PSTDM program at Windows95 or Windows98 2) Set Buad rate to the modem’s.
4) If OK is displayed in the message box, modem is now ready for ommunication with PC. 5) Click MENU BAR icon.
SCRIPTINPUT WINDOW 6) As shown in the picture above, service file input plane will be displayed (See if clock is running. If it isn’t, communication with PC is not activated.
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.
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. U105 has the operation range of RF500MHz~1500MHz and has the conversion gain of 0 dB.
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.
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. 3.2.
Receptacle Ringer Earpiece AUDIO Processor M S M 3 0 0 0 FLASH Memory & SRAM EEPROM Mic 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. In addition, digital audio signals outputted from MSM3000 are converted into analog signals after going through the audio codec to be amplified.
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. Then, the errors of data received from Viterbi decoder are detected and corrected. They are voice decoded at the vocoder in order to output digital voice data. The MSM3000 has a improved feature not found on the MSM2300.
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. Level Translator Part 4.1 L/T supply power to Modem(4.2V). VEXT_DC +4.2V DC/Jack (small) Fixed LDO DC/Jack (large) Adjustable LDO +5V max(207) [Fig 4-1] The Block Diagram of Source (in brief) 4.
NAME DP_DTR/ DP_RXD DP_CTS/ GND DESCRIPTION Data Terminal Ready Receive Data Clear to Send Signal Ground CHARACTERISTIC Host ready signal Input data to the modem Modem output signal Signal ground 4.2.2 Signal level of RXD/TXD Phone LT +3V +3V MAXIM207 +5V PC MSM_input Vout = 2.8V RS232 TX •1 •3 •2 •4 RX MSM_output RS232 PHONE 1 TX• 2 RX• 4 TX• 3 RX• VMAX = 7.68V VMAX = 6.00V VMAX = 3.00V VMAX = 4.88V VMIN = -7.68V VMIN = -5.
4.
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. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
APPENDIX 1. Assembly and Disassembly Diagram 2. Block & Circuit Diagram 3. Part List 4.
1.
2. Block & Circuit Diagram 2.1. MODEM Block Diagram 2.2.
3. Part List 3-1. MODEM Part List NO COMPONENT NAME DESCRIPTION Lay.
20 MCA-ST-00T Mobile Switch Bot MS101 1 SUNRIDGE 21 MIC5219-3.0 LDO Bot U605 1 MICREL Top U602,U603,U606 3 22 MIC5245-3.0BM5 LDO : +3.
56 FI-B1608-182KJT 1.8uH-1608 Inductor Top L112,L113 2 CERATECH 57 FI-A1608-272KJT 2.7uH-1608 Inductor Top L212 1 CERATECH 58 HB-1M2012-601JT INDUCTOR (Bead) Bot L402 1 CERATECH 59 HB-1B2012-222JT INDUCTOR (Bead) Bot L401 1 CERATECH L115,L121,L172,L174,L190, Top 60 BLM11A601SPT INDUCTOR (Bead) 9 L210,L216, L230,L602 CERATECH Bot L604 1 61 GRM36C0G0R5C50PT 0.5pF-1005 Capacitor Top C188 1 MURATA 62 GRM36C0G1R5C50PT 1.
C417,C421,C501,C503,C521, C522,C523,C524,C525,C526, C527,C528,C529,C530,C531, C533,C534,C535,C536,C537, Bot C538,C539,C540,C541,C543, 45 C545,C546,C547,C548,C549, C550,C551,C552,C553,C554, C556,C557,C558,C559,C560, C561,C562,C563,C610,C633 C110,C116,C119,C172,C173, 79 GRM36X7R102K50PT 1nF-1005 Capacitor Top 9 MURATA C181,C191,C195, C215 C111,C115,C127,C128,C129, C130,C134,C135,C139,C151, C171,C174,C176,C196,C203, C206,C211,C218,C221,C224, Top 39 C229,C231,C232,C233,C234, 80 GRM36X7R103K50PT 10nF
91 TA-010TCM4R7S-AR 4.7uF/10V/A 92 TA-6R3TCMS100M-PR Tan Cap (10uF/6.3V/P) Bot • 0 Top C199,C621 2 Bot C350,C406,C410,C416 4 TOWA TOWA 93 TA-010TCMS100K-AR 10uF/10V/A Bot C611 1 TOWA 94 TA-6R3TCMS220K-AR 22uF/10V/A Bot C415 1 TOWA Bot C630 1 TOWA Top R121,R197,R224,R247,R248 4 Bot R542,R555 2 Tan Cap 95 TA-6R3TCMS470K-B2 (47uF/6.
114 MCR01MZSJ392 Bot R303 1 3.9kΩ-1005 Resistor Top R175 1 4.7KΩ 5%-1005 Top R532 1 Resistor Bot R304,R316,R340,R402 4 8.
136 B06F-4001-016 60 Pin Connector 137 DTS800 REAR Top CN501 1 SAMTEK REAR CASE 1 JUNG IL 138 DTS800 FRONT FRONT CASE 1 JUNG IL 139 DTS800 LABEL LABEL 1 SHINHUNG 14 • 27 • C107,C198,C202,C205,C210, 140 DNI Top • L102,L103,L208,R153,R154, R155,R178,R180,R182 C305,C411,C412,C414,C542, C555,C614,C616,L403,L404, R308,R310,R314,R333,R337, 141 DNI Bot • R339,R409,R604,R605,R607, R612,R613,Q302, Q602,Q604, D602,D603, 3-2. Level Translator Partlist NO COMPONENT NAME DESCRIPTION Lay.
21 MCR04MZSJX101 RESISTOR (1608) 100R Bot R3,R4,R14,R16,R17,R18 6 ROHM 22 MCR05MZSJX331 RESISTOR (1608) 330R Bot R5 1 ROHM 23 MCR06MZSJX681 RESISTOR(1608) 680R Bot R6 1 ROHM 24 MCR07MZSJX332 RESISTOR (1608) 3.
