CNI-803M Developer's Guide 1. Overview 2. Specification and features A.Environment www B.General RF specifications C. Rudie interface D. Transmitter E.Receiver 3. Circuit guide 4.
Chimeric Developer's Guide 1. Overview CNI-903M, RPM(Radio Packet Modem), is a digital data communication equipment in accordance with Mobility specification. The frequency it uses ranges from 896Mhz 15 90 Mhz for transmission and from 935MHz to 941MHz for reception. This modem enables vou to make data communication in two-way, and it also helps you to enjoy various types of date services with full mobility due to support for roaming.
CNI-803M Developer's Guide 3, Circuit guide A. RF circuit CNIDARIAN circuit consists of five parts, each of which is power supply, antenna, synthesis/modulation of frequency, transmission and reception. (I) Power supply Power supply is composed of voltage regulator and switching part. Voltage regulator generates 3V of power supplied from VBB when the control of RF_EN switch is turned on. When RF_EN is high, RECCE is regulated with 3V, and RF_VCC 1s supplied 10 PLL IC, VCTCXO, VCO, and Drive Amp(Q104).
CNI-803M Developer's Guide @& Frequency synthesizer and modulator Frequency synthesizer consists of PLL part, VCO module and per-modulation filter. The PLL part is composed of phase detector, loop filter, and 12.6Mhz VCTCXO VCO module generates R96~901Mhz frequencies in accordance with the voltage which is from charge pump of PLL to Loop filter. Programmable Divider in PLL makes the VCO output frequency to any channel value according to the frequency data from Logic CPU.
Ci-903M Developer's Guide 455K Hz, simultaneously. 2nd IF signal of 455KHz passes Ceramicist filer} to remove the noise, and the signal is DE-modulated with discriminator method. Here detected RF signal entered into receiver and RSI signal which indicates the strength, and they are passed to micro processor in analogue value. ® Transmitter Transmitter consists of driver amp and power amplifier, and TX power control, It generates carrier frequency while share RX with frequency synthesizer.
CNI-903M Developer's Guide ® & Decoder Part (ICS) Decoder decodes control signal of CPU and generates DRAM memory choosing signal. Modem Data Pump (1C7) Modem part is in charge of MASC protocol . and transmits teo way Data between CPU and RF part.
Ci-803M Developer's Guide 2. Pin Assignments of CNI-903M This unit can be easily integrated into anywhere of the wireless modem adopted device. BOTTOM VIEW I. RESET 2. TXD 3. PRON 8 RTS 7. SENSE 8. CTS 9. SEb 10.07 VISE R 11. SENSE 12. DSR 13. NM 14. DCD 15. INANE 16. RE 17. KILOWATT 18. 4.2V PWR 19. GND 20. 4.
CNI-803M Developer's Guide 3.
CNI-903M Developer's Guide Mm Design Considerations To integrate a wireless modem, there are several issues that need to be addressed and considered. Internal connections and placement are critical to a successful implementation. A successful design requires attention to several support mechanisms as following: DC Power Serial interface and control Mechanical mounting Software Antenna RF control 1. Production Applications The OEM wireless modem is welt suited for mobile and fixed applications.
CNI-902M Developer's Guide ® Installation Installing CNI-903M modem is very simple as follows Place the modem to connector on product housing, and apply a tittle force to push it down to be connected. Caution : Cars not 10 bend or damage the connector pins. _ Use four #2-56 UNC 2A machine screws to tie up the modem as the figure shown below. . Connect modem connection cable to a small hole provided at the rear of the modem. Connect the modem connection cable to Antenna TIDE SHE sate} 1.
CNI-903M Developer's Guide ® Warning Label Following warning label shall be attached on the devices using CNI-903M modem. While this device is in operation, a separation distance of at least 20 centimeters 7.87 inches) is maintained between radiating antenna and the body of the user or nearby persons in order to meet the FCC RF exposure guidelines.
Ci-803M Developer's Guide ® Antenna Specification Product Name : Whip Antenna of 900MHz Range MODEL : HA-900-S885MA Manufacturer : Han Kook Termagant Company @T Application This specification describes A74 WHIP ANTENNA used for frequency range of 900MHz for transmission DATA of wireless, @& Conditions of using Antenna § Handheld WB Fixed B Mobile W Outdoor WB Indoor 0 Others > Shape of Antenna Refer te attached drawing No.
CNI-803M Developer's Guide @® Other features and performance A. Temperature Antenna shall not be deformed or damaged and shalt satisfy “Clause 47 in this nation after Placing Antenna at —30C and 70°C for 96 hours. specif B. Humidity After placing Antenna at surrounding temp.
CNI-903M Developer's Guide Chl SEN SNR Ls REF jos Gio vine) boor mmm TTT PAN Bad Hz < Picture 2 > Stimulus CHI MEN [dB] | Stimulus [MHz] CH1 MEN [MHz] [dB] 894.000 1.1658 931.000 1.1919 896.000 1.1379 934.000 1.231 899.000 1.1494 936.000 1.2688 901.000 1.1413 939.000 1.3018 904,000 1.1349 941.000 1.3315 906.000 1.1283 944.000 1.3657 909.000 1.1134 946.000 1.4001 911.000 1.1331 949.000 1.4386 914.000 1.0787 951.000 1.4792 916.000 1.0301 934.000 1.5162 919.000 1.0298 956.000 1.5516 921.000 1.6447 959.000 1.
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