153K CDMA Modem

1:PRODUCT INTRODUCTION AC8720 CDMA2000 1X USB Wireless Data Terminal is developed and manufactured by ZTE Corporation supporting laptops/desktops and other equipments with USB interface. AC8720 can provide data, voice and SMS services. ModelCategoryFrequencyRemark AC8720CDMA2000 1X USB Wireless Data Terminal800MHzSupport data, voice, SMS services 2:ACRONYMS Table 1Acronyms Acronyms Full Description ZTEZTE Corporation CDMACode Division Multiple Access R-UIMRemovable User Identity Module CDGCDMA Development Group ESDElectronic Static Discharge EMCElectro Magnetic Compatibility EMIElectro Magnetic Interference DTMFDual Tone Multi-Frequency USBUniversal Serial Bus 3APPEARANCE AND STRUCTURE Table 2Appearance and structure ItemAC8720Remark Appearance Dimension86mm×26mm×10.1mm Weight38.7g Materia PC DisplayLED indication InterfaceUSB interface(USB 2.0)Compatible with USB1.1/1.0 Support operating systemsWindows XP/2000/VISTA, MAC, Linux 4FUNCTIONS 4.1Voice functions Table 3Voice Functions ItemDescriptionRemark VoiceVoice call origination Voice call termination Caller ID presentation Voice call redial Phonebook Received call history Missed call history Dialed call history SoundVoice volume adjustable Incoming call notification New SMS notification 4.2Display functions Table 4Display functions ItemDescriptionRemark Signal strength indication Time and date indication Call ID display Incoming call display Network flux indication Network rate indication 4.3SMS functions Table 5SMS functions ItemDescriptionRemark Send/Receive short messages Short message group send50 recipients Short message copyCopy R-UIM to PC Short message deletingDelete short message Short message storage1000 messages in PC (Depends on PC memory)Different types of R-UIM card have different storage capacities for short messages. Short message handlingReply, forward, save and voice call back SMS automatically split send>160 ASCII automatically split send characters R-UIM card functionSupport R-UIM or built-in UIM 5TECHNICAL SPECIFICATION OF HOST 5.1Communication protocols and technical indices Table 8Communication protocols and technical indices ItemAC8720 Access modeCDMA2000 1X CDMA protocolIS-95A/B, IS-98A, IS2000(CDMA2000 1X) Data rateUp to 153.6kbps Interval between transmitting and receiving frequency45MHz Voice codingEVRC,13k QCELP 5.2RF receiving Table 9RF receiving ItemAC8720 Frequency range869MHz894MHz RX sensitivity-104 dBm(FER≤0.5) Range of receiving signal-25 dBm -104dBm(FER≤0.5) Signal Tone Desensitization Single toneFER≤1.0(-101dBm/BW, 30dBm@±900KHz) Intermodulation Spurious Response AttenuationFER≤1.0(Test1: -101dBm/BW , +900/+1700K Hz, -43dBm) FER≤1.0(Test 2: -101dBm/BW , -900/-1700K Hz, -43dBm) Conducted spurious emission<-76dBm/1MHz(869 894MHz) <-61dBm/1MHz(824 849MHz) <-47dBm/30KHz(other frequency) Demodulation of forward channel under additive white Gaussian noiseFER≤3.0(Test 1: Rate Group 1(9600bps)) FER≤1.0(Test 2: Rate Group 1(9600bps)) FER≤0.5(Test 3: Rate Group 1(9600bps)) FER≤1.0(Test 4: Rate Group 1(4800bps)) FER≤1.0(Test 5: Rate Group 1(2400bps)) FER≤1.0(Test 6: Rate Group 1(1200bps)) FER≤3.0(Test 7: Rate Group 2(14400bps)) FER≤1.0(Test 8: Rate Group 2(14400bps)) FER≤0.5(Test 9: Rate Group 2(14400bps)) FER≤1.0(Test 10: Rate Group 2(7200bps)) FER≤1.0(Test 11: Rate Group 2(3600bps)) FER≤1.0(Test 12: Rate Group 2(1800bps)) 5.3RF Transmitting Table 10RF Transmitting ItemAC8720 Frequency range824MHz 849MHz Max. frequency deviation±300Hz Rated power24.7dBm Max. power23dBm 27dBm@-104dBm Min. output powerLess -50dBm@-25 dBm Standby output power<61dBm Code domain powerThe code domain power of each unactivated sub-channel is at least 23dB lower than the total output power measured at I- and Q- channel. TX timing error±1.0μs Wave form quality factor>0.944 TX phase error1.00 90.00deg Open loop power(Test1: -25dBm/1.23MHz)-48dBm/1.23MHz±9.5dBm (Test 2: -65dBm/1.23MHz)-8dBm/1.23MHz±9.5dBm (Test 3: -93.5dBm/1.23MHz)+20dBm/1.23MHz±9.5dBm Closed loop power ±24dB(9600bps data rate) ±24dB(4800bps data rate) ±24dB(2400bps data rate) ±24dB(1200bps data rate) Conducted spurious emission-42dBc/30KHz or -54dBm/1.23MHz(|f|: 1.25MHz 1.98MHz) -54dBc/30KHz or -54dBm/1.23MHz(|f|: 1.98MHz 4.00MHz) <-13dBm/1KHz(|f| > 4MHz, 9KHz < f < 150KHz,) <-13dBm/10KHz(|f| > 4MHz, 150KHz <f < 3 0MHz) <-13dBm/100KHz(|f| > 4MHz, 30MHz < f < 1GHz) < -13dBm/1MHz(|f| > 4MHz, 1GHz < f < 10GHz) ItemAC8720 Frequency bandwidth TX:824MHz849MHz RX:869MHz894MHz VSWR≤2.0 Gain2dBi Input/output resistance50Ω Polarization formVertical polarization 5.5Work condition Working temperature: -10 +55 Storage temperature: -20 +70 Humidity: < 95%