The cell phone works in a certain frequency range

The static testing of mobile phone jammer should be completed in every point. 
Amplifier after the signal by the filter, duplexer, after entering the antenna out. There are a logical part of the main processor MCU, voice codecs, drivers and other peripheral control circuit. GSM cell phone is actually the main processor of the brain, which controls the cell phone to coordinate the work of the various parts of the circuit, in addition, usually the main processor is also responsible for the communication process in call connection control signaling operation. The data come from the DSP, if it is signaling, it is handled by the MCU, if the voice is sent to the voice Codec to deal with, MCU usually with EEPROM, Flash RAM, RAMROM body such as the program storage, data storage at. The power supply adapter of mobile phone jammer should be placed at the middle and lower parts of the box body.
General software upgrade, just in EEPROM and FlashRAM can override the program and data. Voice Codec mainly for voice signals, according to the GSM voice signals RELP-LTP codec program, the speech signal coding and decoding, but also includes part of the channel coding, such as interleaving, CRC processing. Voice Codec is generally driven by voice control chip and a microcell phone, speakers and other peripherals connected, one is driven peripheral, the other is to protect the Codec chip. Other peripherals on the cell phone, such as battery, charger, keypad, display panels generally have a dedicated interface circuit to the MCU, the interface circuit also plays a protective function of the MCU. The lightning protection measure of mobile phone jammer is actually adding the lightning rod to mobile phone jammer .After mobile phone jammer being connected with the rectifier and switched on, it can work
Launch system: the part of the RF receiver and RF transmitter, whose circuit includes: receiver front-end power to control the vibration, frequency and other part either RF or RF receiver system can cause system failures do not network. Power system: Different part series cell phones have different power characteristics, to be specific repair cell phone analysis system to produce several sets of normal power supply voltage to the display part of the receiver transmitter logic power supply, power supply part of a cell phone does not work, the Ministry of the corresponding copies will also fail. signal line: we need the flow of the signal line.The cell phone works in a certain frequency range and connects with the base station via radio wave and mobile phone jammer can interfere with it.
Cell phones to read synchronization channel (SCH) of information to identify base stations (BTS) to identify other codes, and synchronized to the high number of frames on the TDMA frame.