本文介绍了一种数字式下变频器的控制系统。
This paper introduces a numeral down converter control system.
采用双变频调速技术，日本松下变频器，保证机器各部位运行同步。
The machine adopts dual-frequency conversion timing technology and Japan panasonic transducer, assuring every part drives synchronously.
从而有可能避免使用专用硬件下变频器，使硬件电路更简化和增加系统的灵活性。
This will avoid using special hardware of digital down converter, make hardware simpler and increase the flexibility of system.
对空载、带载情况下变频器产生的不平衡电压和高次谐波的含量进行了测试与分析。
Reference to research status of MDT and by analyzing the special working environment of the ESP, the multi-signal are carried with motor power line.
最后给出了FPGA实现的数字下变频器在测试中产生的波形和频谱，作了测试结果分析。
At the end of this paper, waves and spectra generated by FPGA DDC during tests are given and test results are analyzed.
在宽带数字接收机中，高速数据流的实时处理对后继数字下变频器性能提出了极为苛刻的要求。
The real time processing of high speed data flow makes strict demands on the performance of descendant digital down converter in the wideband digital receiver.
为满足卫星测控业务的要求、完成C频段遥测信号的接收工作，本课题研制了C频段下变频器。
The subject derives from the project of "C-band Down Converter" , which is contented with the satellite testing and controlling system. It deals with the signal from the satellite.
为满足卫星测控业务的要求、完成C频段遥测信号的接收工作，本课题研制了C频段下变频器。
The subject derives from the project of "C-band Down Converter" , which is contented with the satellite testing and controlling system.
在此基础上，提出了数字下变频技术在可编程数字下变频器HSP50214 B中的应用方案。
On the base of these, the paper analyzes applications of digital down converting in the HSP50214B programmable downconverter.
能否以艾默生ct的变频器产品为例，谈一下变频器与传动产品在功能以及技术上未来的发展趋势？
Can you please use Emerson CT drives for instance, sharing with us the future drives developing trend in terms of technology and feature?
介绍了数字直接合成器 （DDS）、数字下变频器 （DDC）、数字滤波器等数字无线电经常用到的概念 。
We also introduced some concept of digital radio, including digital direction synthesizer (DDS) and digital down conversion (DDC) and digital filter.
基于直接下变频的系统架构，接收机集成了低噪声放大器、I/Q下变频器、去直流偏移滤波器、基带放大器和信道选择滤波器。
Based on a direct-conversion architecture, the receiver integrates LNA, I/Q mixer, DC-offset removal filter, baseband amplifier and channel-select filters on a single chip.
在软件方面，主要介绍了数字下变频器的参数设置、接收系统的应用软件设计以及系统核心芯片ADSP2191的监控软件设计。
In the software design, the parameter setting of digital down converter, the application program of this receiving system and the design of ADSP2191 "s monitoring program are mainly introduced."
介绍了软件无线电的基本思想及结构，提出了一种基于可编程数字下变频器HSP50214B的中频软件无线电接收系统的设计方案。
The basic concept and architecture of software radio is introduced in this paper. And a type of software radio receiver based on programmable digital down converter (DDC) -hsp50214b is presented.
模块的硬件设计主要包括：A／D转换器、数字下变频器（DDC）以及DSP，详尽讨论了A／D 器件AD6640和DDC 器件AD6624的设计和应用；
The design of hardware module includes A/D converter, DDC (Digital Down Converter) and DSP. The design and application of AD6640 and AD6624 are fully discussed in this part.
全数字化接收机是实现软件无线电技术的重要基础，本文研究基于可编程四通道数字下变频器HSP5 0 2 16实现高频地波雷达数字接收机设计的若干关键技术。
The fully digitalized receiver is the important basis for software radio. Some key technologies about how to realize the HF ground wave radar receiver based on the HSP50216 are addressed.
全数字化接收机是实现软件无线电技术的重要基础，本文研究基于可编程四通道数字下变频器HSP5 0 2 16实现高频地波雷达数字接收机设计的若干关键技术。
The fully digitalized receiver is the important basis for software radio. Some key technologies about how to realize the HF ground wave radar receiver based on the HSP50216 are addressed.
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