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本文简要介绍了3DX中波固态发射机的主要技术特点。3D(直接数字驱动)替代了DX发射机中的缓冲放大器、前级驱动器、驱动级编码器、射频驱动器、驱动级合成器以及射频分配器等功能;DSAM(数字串行自适应调制)能连续地监控每一个串行调制编码和射频功放模块:IPM(附加相位调制)校正器用来补偿由于使用直接驱动调制所引入的射频载波相位误差。运用3D技术的发射机不仅减少了机器的复杂性和误码率,降低了运行成本和维护量,更为重要的是提高了发射机的稳定性和效率。
This article briefly introduces the main technical features of the 3DX medium wave solid state transmitter. 3D (Direct Digital Drive) replaces the buffer amplifier, front stage driver, driver stage encoder, RF driver, driver stage synthesizer and RF distributor in DX transmitters; DSAM (Digital Serial Adaptive Modulation) Each of the Serial Modulation Code and RF Amplifier Modules is monitored: The IPM (Additional Phase Modulation) corrector is used to compensate for the RF carrier phase error introduced by the use of direct drive modulation. Transmitters using 3D technology not only reduce the complexity of the machine and the bit error rate, reducing operating costs and maintenance, more importantly, to improve the stability and efficiency of the transmitter.