Communication Network Interface CNI-803D Radio Packet Modem User Manual Users Guide

Communication Network Interface Inc. Radio Packet Modem Users Guide

Users Guide

1User Guide toUser Guide toUser Guide toUser Guide to CNI-803D(Radio Packet Modem)(Radio Packet Modem)(Radio Packet Modem)(Radio Packet Modem)CNI Inc.CNI Inc.CNI Inc.CNI Inc.
21. Overview _____________________________________________________ 32. Specification and features________________________________________ 3A.Environment ________________________________________________ 3B.General RF specifications _____________________________________ 3C.Radio interface ______________________________________________ 3D.Transmitter_________________________________________________ 4E.Receiver____________________________________________________ 43. Circuit guide____________________________________________________ 5A. RF circuit _________________________________________________ 5B. LOGIC Circuit_________________________ ________________ ____74. Installation Guide_____________________________ ______________ 91. OverviewCNI-803D, RPM(Radio Packet Modem), is a digital data communication equipment inaccordance with RD-LAP19.2 and MDC4800 specification. CNI-803D uses the frequencyranges from 806MHz to 821Mhz for transmission, and from 851MHz to 866MHz forreception.This modem enables you to make data communication in two-way, and it also helps youto enjoy various types of data services with full mobility due to support for roaming.With ‘Interface Connector’ you can apply this modem to many kinds of machines to use‘RD-LAP and MDC Asynchronous Serial Communication (NCL)’ protocol forcommunication, and NCL commands enable you to monitor the operation duringcommunication.
3! Basic specification- Dimension : 70 ×47×9mm- Weight : 37 g- Supply voltage : 5V- RF protocol : RD_LAP19.2 on Data TAC4000&5000 Μ∆Χ4800 ον ∆ατα ΤΑΧ4000- Host protocol : NCL1.22. Specification and featuresA. Environment- Operation temperature : -30 ~ +60- Storage temperature : -35 ~ +80- Humidity : normal operation after 8 hours storage in 95% non-condensedB. General RF specifications- Modulation : 4FSK for RD-LAP 2ΦΣΚ φορ Μ∆Χ- Mode : half-duplex- Bit rate : 19200bps for RD_LAP, 4800bps for MDCC. Radio interface- Channel spacing : 25KHz- Bandwidth : 20KHzD. TransmitterFrequency : 806 ~ 821 MHzTransmit power : 2WattFrequency stability : 2.5ppmModulation stability : ±10%FM deviation : 5.6KHz for RD_LAP (Logic +3+3-3-3) 2.5KHz for MDC (Logic +1-1)Harmonic and Spurious Emission : -60dBcRX to TX Transition Time :  8msE. Receiver Frequency : 851 ~ 866MHz Sensitivity Static : -114dBm for the MDC : -94dBm for the RD_LAP Adjacent and Alternate Channel Selectivity : 40dB/45dB for the Data 55dB/60dB for the Tone CO-Channel Decode Ratio : 8dB for the MDC : 16dB for the RD_LAP Spurious Response Attenuation : 60dBc Image Frequency rejection : 50dBc
43. Circuit guide A. RF circuit CNI-803D circuit is composed of five parts such as power supply, antenna,synthesis/modulation of frequency, transmission and reception.1 power supply Power supply is composed of voltage regulator and switching part. Voltage regulatorgenerates 3V of power supplied from VBB when the control of RF_EN switch is turned on. When RF_EN is high, RF_VCC is regulated with 3V, and RF_VCC is supplied to PLL IC,VCTCXO, OP-Amp(IC102), VCO, and Drive Amp(Q104).When RX_EN is low, RX_VCC is turned on by Q202, and RX_VCC (3V) is supplied toLNA, MIXER, IF AMP and IF IC.When TX_EN is low, TX_VCC is turned on by Q201, and TX_VCC (3V) is supplied toBuffer Amp(Q105) and OP-Amp(IC104). The switch between TX mode and RX mode can be achieved by control of RX_EN(Q202)and TX_EN(Q201).2 Antenna Antenna part is composed of antenna matching circuit, BPF, and Rx/Tx signal isolationcircuit. CNI-803D adapts /4 WHIP antenna to match to mid range frequency of communication. TX/RX signal isolation circuit isolates signals of communication and is composed ofswitching diode and inductor. The signals received from antenna meet the send/receive path and then D1 is turned onand the signals proceed only to receiving path. In receiving mode, signals from TX PowerAmp can not go through RX path because D101 is off. (refer to RF circuit diagram)3 Frequency synthesizer and modulator Frequency synthesizer consists of PLL part, VCO module and pre-modulation filter. ThePLL part is composed of phase detector, loop filter, and 12.6Mhz VCTCXO VCO module generates 806~821Mhz frequencies in accordance with the voltage which isfrom charge pump of PLL to loop filter. Programmable Divider in PLL makes the VCOoutput frequency to any channel value according to the frequency data from Logic CPU.Phase detector gets low and high frequencies from comparison of phase. Loop filter filtersthe frequencies to get a value of voltage. The voltage is input to VCO to achieve phaselock process.Modulation is completed when modem IC signal of Logic part is input to VCO andauthorized.4 Receiver
5Receiver filters and amplifies RF signal through SAW filter and LNARX part is double super heterodyne type, and consists of LNA, LPF, Mixer, SAW filter andIF IC part. There happens RX signal from antenna and the signal is low-noise-amplification (LNA) through SAW filter and LNA, and it comes to 2nd IF 455KHz via 2ndX-TAL44.545MHz.SAW filter rejects Image frequency(RX ±2*IF) generated from 1’st Mixer while receiving.For example, if the input channel is 858Mhz, the output frequency would be 45Mhz frommixer while local frequency is 813Mhz. However, if SAW filter will not filter the imagefrequency of 858±2*IF, S/N would be worse with 45Mhz(813-768=45) of noise. And SAWfilter should filter to prevent local frequency becoming spurious through LNA and reversepath.LNA amplifies and sends the faint signal from antenna to mixer, and mixer TR mixes andgenerates 1st IF with frequency from antenna.IF comes from mixer. And IF contains inter-modulation product component. MCFremoves that product component. So clean IF(45MHz) can be inserted to IF IC. 2nd localfrequency entered IF IC is mixed with the IF(45MHz) signal to be 2nd IF of 455KHzsimultaneously.2nd IF signal of 455KHz passes LPF(Ceramic filer) to remove the noise, and the signal isde-modulated with discriminator method. Here detected RF signal entered into receiverand RSSI signal which indicates the strength, and they are passed to micro processor inanalogue value.5 Transmitter Transmitter consists of driver amp and power amplifier, and TX power control. Itgenerates carrier frequency while share RX with frequency synthesizer. Local frequency is used to direct transmission frequency because there is differencebetween transmission and reception. So it only amplifies and propagates through PA(Power Amp.) which can get high level of gain easily with low power.B. LOGIC Circuit1 SummaryThis unit consists of CPU part, Decoder part, modem part, and power supply part.2 CPU part(IC3)The CPU adopted by this unit has 16/32-bit ARM7TDMI RISC processor (66MHz)and works on 4.9152MHz. The main functions are as follows;- Execute MASC protocol- Control PLL circuit of R/F part and perform Power Saving function- Perform Data transaction function( receiving and transmitting) through DataPump(Modem)part- Checking and processing of RSSI Level come from R/F part- Perform Data transaction with DTE through DTE interface part3 Memory part(IC1, IC3)Memory part consists of FLASH Memory(2Mb, IC1) and SRAM(2Mb, IC3). Flash
6Memory stores LLI information and program. And SRAM supplies memory stacks forprogram.4 Decoder Part(IC6)Decoder decodes control signal of CPU and generates SRAM memory choosingsignal.5 Modem Data Pump(IC7)Modem part is in charge of NCL protocol , and transmits two way Data between CPUand RF part. The main functions are as followings ;- Packet Data Framing- FSK Data Modulation- FEC Encoding/Decoding- Interleaving/De-interleaving4.Installation Guide" Modem Descriptions1. Physical Dimensions2. Serial Interface between Application DTE3. Power Supply and Current Usage" Design Consideration1. Product Applications1.1 Use for Portable Terminal1.2 Use for fixed mount" Installation1. Mounting
71.1 Fastening1.2 Grounding" Warning Label" Antenna Spec.
81.physicalDimensions
102. Serial Interface Between Application DTEThis unit can be easily integrated into anywhere of the wireless modem adopteddevice.1. RESET : External Reset 11. SENSE4 : Status Input 42. TXD : Transmit Data 12. DSR : Data Set Ready3. PWRON : RPM Power On/Off 13. MAGWAIT : Message Wait4. RXD : Receive Data 14. DCD : Data Carrier Detect5. SENSE1 : Status Input 1 15. INRANE : In Range Indicator6. RTS : Request to Send 16. RI : Ring Indicator7. SENSE2 : Status Input 2 17. LOWBATT : Low Battery8. CTS : Clear to Send 18. 5V PWR : 5V Power Supply9. SENSE3 : Status Input 3 19. GND : Ground to Host10. DTR : Data Transmit Ready 20. 5V PWR : 5V Power SupplyINTERFACE CIRCUIT OF CNI-803D
11MSGWAITTxDA22VCCHOSTCPU22PWRONLOWBATTHOSTVCC VCCSENSE1-4 SENSERIHOSTVCCCPUCPUINRANGERTS22HOST HOSTVCC2222DSRRXDVCCVCCCPU DTRINDICATERxDA22VCCCPU22CTSVCCRESETDCD TXD
123. Power Supply and Current Usage3.1 Example of Power Supply from out-source : input Voltage 5V±10%,more than 3A3.1 3.2 Current UsageTX : 2000mARX : 78AStand-By : 12mADesign ConsiderationsTo integrate a wireless modem, there are several issues that need to be addressed andconsidered. Internal connections and placement are critical to a successfulimplementation. A successful design requires attention to several supportmechanisms as following:- DC Power- Serial interface and control- Mechanical mounting- Software- Antenna- RF control
131. Production ApplicationsThe OEM wireless modem is well suited for mobile and fixed applications. Thewireless modem enables user to send/receive data anytime anywhere, and canprovide communications for a wide variety of products1.1 Portable Terminal UsePortable designs produce good environment for an integrated modem. Theportable terminal is typically battery powered, subject to temperature extremes,and designed to be physically strong. When designing portable device, userneeds to pay attention to the following issue:- DC power noise levels on the host interface- Minimum operating voltage levels- Device internal ambient temperature- Antenna gain and proximity to user- Mechanical design for drop, vibration, dust, salt and liquid spill.Note : Regarding this last point, CNI-803D modem is designed on the assumption thatthe host device will control these conditions1.2 Fixed Mount UsageFixed-mount usage eliminates most of the mechanical constraints of handheld designs.The core requirement applies, but fixed usage does not present any special conditionsto address." InstallationInstalling CNI-803D modem is very simple as follows:- Place the modem to connector on product housing, and apply a littleforce to push it down to be connected.Caution : Care not to bend or damage the connector pins.- Use four #2-56 UNC 2A machine screws to tie up the modem as thefigure shown below.- Connect modem connection cable to a small hole provided at the rear ofthe modem.- Connect the modem connection cable to Antenna
141. MountingProper mounting of the modem requires a combination of securely fastening itwithin the product housing as well as adequately grounding the modem case tothe housing.1.1 FasteningMount the modem to the rigid OEM product housing by using three #2-56UNC 2A machine screws as the figure shown below:1.2 GroundingFor CNI-803D modem, the pin number 19 of connector on the modem isground pin. So if user properly places the modem, ground is automaticallydone." Warning LabelFollowing warning label shall be attached on the devices using CNI-803D 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 useror nearby persons in order to meet the FCC RF exposure guidelines.
15" Antenna Spec.Product Name : Whip Antenna of 800MHz RangeMODEL : HA-850W-SSMA1. ApplicationΤηισ σπεχιφιχατιον δεσχριβεσ λ/4 WHIP ANTENNA used for frequency range of 800MHzfor τρανσµισσιον ∆ΑΤΑ οφ ωιρελεσσ.2. Conditions of using Antenna € Ηανδηελδ € Φιξεδ € Μοβιλε € Ουτδοορ € Iνδοορ ϒ Οτηερσ3. Shape of AntennaΡεφερ το ατταχηεδ δραωινγ Νο.11Τ−17−0034. Electrical features and PerformanceItem Features/Performance RemarkFrequency range 806 ~ 870 MHzNominal impedance 50 ΩV.S.W.R Below 1 : 2.0Radiation Omni-directionPolarization VerticalGain Unity5. Structural Specification
16Item Specification/Features RemarkRadiator Ø1.5 Speedo wireSleeve Shrinkable Tube F-Type Ø1.5Connector SMA-Plug Ni-platingTotal length 88± 2mm6. Other features and performance6.1 TemperatureAntenna shall not be deformed or damaged and shall satisfy “Clause 4” in this specification afterPlacing Antenna at –30 and 70 for 96 hours.6.2 HumidityAfter placing Antenna at surrounding temp. 40 ωιτη ρελατιϖε ηυµιδιτψ οφ 90 ∼ 95 φορ 96ηουρσ, αντεννα σηαλλ νοτ βε δεφορµεδ ορ δαµαγεδ, ανδ σηαλλ σατισφψ “Χλαυσε 4” ιν τηισσπεχιφιχατιον

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