PRODUCT : CDMA/EVDO WIRELESS MODEM MODEL NAME : LTD-VH1000 1. Overview 2. Major Features 3. Interface 4. Electrical Specifications 5. RF Specifications 6. Mechanical Specification 7. General Specification 8. Parts Map 9. Connector 10.
1. Overview The LTD-VH1000 is achieved as personal mobile communication devices of the compact radio equipment, the latest design of the parts becoming smaller, lighter weight having the 850/1900MHz bands. It is the vehicle’s telematics system that connect with CDMA(EVDO) wireless network and the wireless module with voice and data communication. It can be operated at land, rivers, and other similar areas. On EVDO operating mode, It can be communicated with uplink 1.8Mbps, downlink up to 3.
2. Major Features Mechanical Dimension 38.4 (W) x 92 (L) x 7.6 (T) mm Interface USB, UART, General Purpose I/O pins Antenna FAKRA Connector Operation : -20℃ ~ +70 ℃ Storage : -40 ℃ ~ +85 ℃ Main Chipset MDM 6600 Memory 512Mb(NAND) / 256Mb(SDRAM) 3GPP2 CDMA 1X, EVDO Rev.A Temperature * CDMA Standard - UL Speed : 1.8 Mbps CDMA 850(DCN), 1900 (PCS) GPS(Not supported) Power Max. 24dBm (Power Class 3) OS Android 2.3 DC Power 3.
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3. Interface 3.1.
3.2. Pin Descriptions Pin NO. Signal Name In/Out 기능 NC 1, 2, 3, 4, 13, 15, 17, 38 V_BATT 31, 32 GND 21, 22, 33, 34, 40 NC POWER POWER GND GND 16 PCM_3.3V_TXD O PCM DATA OUT 18 PCM_3.3V_RXD I PCM DATA IN 19 PCM_3.3V_CLK O PCM CLK 20 PCM_3.
3.3. UART ( RS-232 Interface ) This module is provided with interface supporting Standard RS-232 protocol. DCE(modem) is exchanged with data or control AT-Command through DTE(host). Pin NO. Signal Name Function (Modem) Pin Function Summary 37 TXD2 I Serial Data Input 2 39 RXD2 O Serial Data output 2 3.4. USB It is supported with universal serial bus for high data communication. It is satisfied with USB2.0 specification and supported with Max.480Mbps Pin NO.
3.6. User Interface Signals Pin NO. Signal Name Function Pin Function Summary (Modem) 9 GPIO NC 10 GPIO NC 11 BOOT_OK O Modem booting end / Modem Wake Up 12 MSG O Received emergency message from center 14 GPIO 27 48H_END O Signified in 48 hours standby mode ending 28 RESET_IN- I Modem Hardware reset input 30 ACC(POWER_ON) I Modem Power ON/Modem POWER Sleep NC 3.7. PCM Signals Pin NO. Signal Name Function (Modem) Pin Function Summary 16 PCM_3.
4. Electrical Specifications 4.1. Power Supply Specification Modem power(V_BATT) should be provided DC3.8V ± 0.1V, 1.5A. Modem power is provided according to inner function and per block using DC regulated circuit. It is controlled with each power depending on the mechanism to reduce power consumption to a minimum. PA is used directly V_BATT because of a lot of power input power source. Thus, It can be resulted in breakage of PA in excess of the rated input power.
5. RF Specifications 5.1. Receiver Bandwidth: 1.25MHz Frequency: 869MHz – 894MHz(BC0), 1930MHz – 1990MHz(BC1) RF to Baseband Direct conversion(Zero IF) Modulation method : QPSK,8PSK and 16QAM Sensitivity: -104dBm under (BER = 0.5%under) 5.2. Transceiver Frequency : 824MHz – 849MHz(BC0), 1850MHz – 1910MHz(BC1) Maximum RF Output: Power class3(BC0) Power class2(BC1), 23.01dBm ~ 30dBm max.
6. Mechanical Specification 6.1. Mechanical Dimensions Dimensions 92.0 x 38.4 x7.6 mm Weight 30.7 grams max.
6.2. Environmental Specifications 1) Storage Temp : -40℃ ~ +85℃ 2) Operating Temp : -20℃ ~ +70℃ (-20℃ ~ +70℃ : 3GPP specifications satisfaction -30℃~-20℃, +70℃~+80℃ : can be performance degradation 3) Operating humidity : 90% (50℃) relative humidity 4) Operating vibration : 5 Hz ~ 500 Hz Signe wave 1.
7. General Specification 7.1. CDMA Electrical Specification CH(850MHz/1900MHz) CHANNEL 시험 항목 Spec. 1017/25 4.4.5 Maximum Output Power 4.5.1 Conducted Spurious Emissions 23.01~30dBm 885 kHz to 1.98 MHz -42 dBc↓/30 kHz 1.98 MHz to 4.00 MHz -54 dBc↓/30 kHz (BC0) -50 dBc↓/30 kHz (BC1) 4.4.6 Minimum Controlled Output Power -50dBm↓ 4.3.4 Waveform Quality Rho Freq_E Time_E 4.4.9 +/-300.00Hz(BC0) +/-150.00Hz(BC1) -1.00~1.
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9. Connector 9.1.
9.2. 40Pin Connector : KM17E-40DS (manufacturer : HIROSE) Figure 4.
10. Antenna Specification 10.1 Antenna spec. 10.1.1Frequency Band Frequency Band CDMA 850 CDMA 1900 TX 824 ~ 849 1850 ~ 1910 RX 869 ~ 894 1930 ~ 1990 10.1.2 Normal value 50Ω ± Normal 10.1.3 Measuring method The impedance over the frequency bands shall be as close as possible to 50Ω after matching. Both free space and talk position are considered. 10.2 VSWR The impedance matching should be optimized in the more critical talk position. 10.2.1 Maximum values in free space Band VSWR 10.2.
a. Azimuth Pattern ; Co – pol b. Azimuth Pattern ; Cross – pol Figure 6.
11. RFx information The RF field strength of the wireless module or modules that may be embedded in your TCU is well all international RF exposure limits as known at this time. Because the wireless modules(which may be embedded into your TCU) emit less energy than is allowed in radio frequency safety standards and recommendations, manufacturer believes these modules are safe for use. Regardless of the power levels, care should be taken to minimize human contact during normal operation.
