User Guide to CNI-803D (Radio Packet Modem) CNI Inc.
1. Overview _____________________________________________________ 3 2. Specification and features________________________________________ 3 A.Environment ________________________________________________ 3 B.General RF specifications _____________________________________ 3 C.Radio interface ______________________________________________ 3 D.Transmitter _________________________________________________ 4 E.Receiver____________________________________________________ 4 3.
! Basic specification - Dimension - Weight - Supply voltage - RF protocol : : : : 70 ×47×9mm 37 g 5V RD_LAP19.2 on Data TAC4000& 5000 Μ∆Χ4800 ον ∆ατα ΤΑΧ4000 - Host protocol : NCL1.2 2. Specification and features A. Environment - Operation temperature : -30 ~ +60 Storage temperature : -35 ~ +80 Humidity : normal operation after 8 hours storage in 95% noncondensed B.
3. 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 regulator generates 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).
Receiver filters and amplifies RF signal through SAW filter and LNA RX part is double super heterodyne type, and consists of LNA, LPF, Mixer, SAW filter and IF IC part. There happens RX signal from antenna and the signal is low-noiseamplification (LNA) through SAW filter and LNA, and it comes to 2nd IF 455KHz via 2nd X-TAL44.545MHz. SAW filter rejects Image frequency(RX ±2*IF) generated from 1’st Mixer while receiving.
Memory stores LLI information and program. And SRAM supplies memory stacks for program. 4 Decoder Part(IC6) Decoder decodes control signal of CPU and generates SRAM memory choosing signal. 5 Modem Data Pump(IC7) Modem part is in charge of NCL protocol , and transmits two way Data between CPU and RF part. The main functions are as followings ; - Packet Data Framing - FSK Data Modulation - FEC Encoding/Decoding - Interleaving/De-interleaving 4.Installation Guide " Modem Descriptions 1.
1.1 Fastening 1.2 Grounding " Warning Label " Antenna Spec.
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2. Serial Interface Between Application DTE This unit can be easily integrated into anywhere of the wireless modem adopted device. 1. RESET 2. TXD 3. PWRON 4. RXD 5. SENSE1 6. RTS 7. SENSE2 8. CTS 9. SENSE3 10. DTR : External Reset : Transmit Data : RPM Power On/Off : Receive Data : Status Input 1 : Request to Send : Status Input 2 : Clear to Send : Status Input 3 : Data Transmit Ready 11. SENSE4 12. DSR 13. MAGWAIT 14. DCD 15. INRANE 16. RI 17. LOWBATT 18. 5V PWR 19. GND 20.
VCC RXD DCD DSR CTS RI VCC VCC CPU TxDA HOST VCC TXD DTR RTS VCC RxDA HOST 22 22 VCC VCC MSGWAIT INRANGE LOWBATT CPU 22 VCC VCC CPU CPU SENSE1-4 INDICATE HOST SENSE HOST 22 22 RESET CPU PWRON HOST 22 11 22
3. Power Supply and Current Usage 3.1 Example of Power Supply from out-source : input Voltage 5V±10%, more than 3A 3.1 3.2 Current Usage TX : 2000mA RX : 78A Stand-By : 12mA 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.
1. Production Applications The OEM wireless modem is well suited for mobile and fixed applications. The wireless modem enables user to send/receive data anytime anywhere, and can provide communications for a wide variety of products 1.1 Portable Terminal Use Portable designs produce good environment for an integrated modem. The portable terminal is typically battery powered, subject to temperature extremes, and designed to be physically strong.
1. Mounting Proper mounting of the modem requires a combination of securely fastening it within the product housing as well as adequately grounding the modem case to the housing. 1.1 Fastening Mount the modem to the rigid OEM product housing by using three #2-56 UNC 2A machine screws as the figure shown below: 1.2 Grounding For CNI-803D modem, the pin number 19 of connector on the modem is ground pin. So if user properly places the modem, ground is automatically done.
" Antenna Spec. Product Name : Whip Antenna of 800MHz Range MODEL : HA-850W-SSMA 1. Application Τηισ σπεχιφιχατιον δεσχριβεσ λ/4 WHIP ANTENNA used for frequency range of 800MHz for τρανσµισσιον ∆ΑΤΑ οφ ωιρελεσσ. 2. Conditions of using Antenna € Ηανδηελδ € Φιξεδ € Μοβιλε 3. € Ουτδοορ € Iνδοορ ϒ Οτηερσ Shape of Antenna Ρεφερ το ατταχηεδ δραωινγ Νο.11Τ−17−003 4. Electrical features and Performance Features/Performance Item 5. Frequency range 806 ~ 870 MHz Nominal impedance 50 Ω V.S.W.
Specification/Features Item Remark Radiator Ø1.5 Speedo wire Sleeve Shrinkable Tube F-Type Ø1.5 Connector SMA-Plug Ni-plating Total length 88± 2mm 6. Other features and performance 6.1 Temperature Antenna shall not be deformed or damaged and shall satisfy “Clause 4” in this specification after Placing Antenna at –30 and 70 for 96 hours. 6.2 Humidity After placing Antenna at surrounding temp.
