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Weihai IDENCODER Electronic Technology Co.,Ltd

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Working Principle Of The Tool Post Encoder

             The tool holder encoder, a kind of electric turret letter-plate protection circuit, by the diode (1) and RC Filter circuit series, the RC filter circuit consists of resistor (2) and capacitance (3). After all the signal output terminals of the electric turret are connected with the protection circuit of the utility model, can prevent DC power inverter and operating over-voltage, high harmonic voltage and instantaneous over-current impact damage, the Power input terminal series of the protection circuit of the utility model, can ensure that the letter tray Hall elements stable work point.Tool Post Encoder

             The signal from the letter source is encoded by source, the frame is connected to the high speed digital signal, and in the frame multiplex part, the microwave can be divided into quasi synchronous Digital series (PDH) and synchronous Digital series (SDH) according to the system adopted. Then the code-type transformation part, including the line code and the line decoding, because the serial code flow from the multiplexing device, usually includes the DC and the Low-frequency component, and the transmission channel is the isolated DC, which needs to remove the DC component in the baseband signal, This task is done by the encoder in the code transformation. The International Telecommunication Union (ITU) rules on line codes are: When the transmission rate is one, the three group, the transmission code type is the high density bipolar 30 substitution (HDB,) code, the transfer code is the symbol reversal code (CMI) when the transmission rate is more than four times group. Transmission code after the channel transmission, into the decoder, and become suitable for the circuit processing of the zero-code. The clock is presented from the transmission code by using the clocks extraction circuit, which is used for processing the serial code stream.Tool Post Encoder

            The scrambling circuit transforms the signal data into pseudo random sequence, eliminates the discrete spectral component in the data stream, makes the signal power evenly distributed within the allocated bandwidth, and the serial code flow is changed into the parallel code stream, and the parallel way depends on the modulation mode. Error-Correcting coding can reduce the BER of the system. Gray code to Gray code to complete the transformation, because gray code transmission error rate is low. The differential coding is used to solve the phase ambiguity problem in carrier recovery, because the D/a converter can only carry out natural binary code to multilevel transformation. Therefore, before d/a transform, we need to transform gray/natural code, then by D/A transform, the multiple-bit code elements into multi-level signals, the role of the mesh equalizer is to transform the multi-level signal into a narrow pulse to meet the transfer function of the input pulse requirements. Then into the modulator for modulation, the frequency is generally 70MHz or 140MHz, after the modulation of the if signal after the delay equalization and if amplification, sent to the letter mixer, the intermediate frequency modulated signal and the letter of the signal is mixed frequency after the microwave has been modulated signal. After the one-way, RF amplifier and shunt filter, the output power and frequency requirements of the microwave have been adjusted signal, sent to the feed system through the antenna to the other side.Tool Post Encoder