The design of the device using NC Lathe CA6140 control, part of the main transmission system using AC spindle motor and graded by the pulley driven spindle gearbox, through the inverter and gearbox to achieve sub; Feed System used by stepper motor driven ball screw slowdown after campaign vertical feed system through a gear after the ball screw drive, in the horizontal feed system through two gear-driven ball screw; Tool to automatically transfer tool carrier (4-position), thus achieving automatic tool change; by MCS-51 series 8051 data to be dealt with. from the I/O interface stepper pulse output signal to control the feed rate and itineraries; In order to maintain the function of cutting thread, to the outer end of spindle or other appropriate location loaded pulse generator; Lathe will be transformed into Tailstock manually controlled electric Tailstock.
本设计利用数控装置对CA6140普通车床进行控制，主传动系统部分采用交流调频主轴电动机经带轮及分级齿轮变速箱驱动主轴，通过变频器和齿轮变速箱实现分段无级变速；进给系统采用步进电机通过减速后驱动滚珠丝杠运动，在纵向进给系统中通过一级齿轮减速后驱动滚珠丝杠，在横向进给系统中通过二级齿轮减速驱动滚珠丝杠；刀架改为自动转位刀架从而实现自动换刀；通过MCS-51系列8051单片机对数据进行计算处理，由I/O接口输出步进脉冲信号控制进给速度和行程；为了保持切削螺纹的功能，要在主轴外端或其它适当部位装上脉冲发生器；将车床的手动尾座改造成为可控电动尾座。
The 8780A vector signal generator'wideband modulation is complemented with an unmodulated coherent carrier output for demodulation of test signals.
该8780a 矢量信号发生器'宽带调制，补充了一个 unmodulated 相干载波输出解调测试信号。
Two kinds of pulse generation methods are proposed based on the analysis of Impulse signal. One is direct pulse generator based on step recovery diode and the other is carrier pulse generator based on tunnel diode.
为了进一步解决在多径环境中的脉冲帧间干扰问题，注意到采用恒虚警接收时信号占空比随着信噪比增加呈单调增加的特点，采用基于接收信号占空比统计的自动增益控制方法，保证判决门限在合适的电平上。
Feature Highlights 397-Dual output configuration with independent waveform control 397-Tight phase offset control between channels (1 point resolution) 14-bit vertical resolution Nearly 19-bit offset resolution 396-1 Meg memory depth 397-4 Meg memory depth for each channel Ultra fast waveform downloads using DMA 125 MS/s sample clock frequency 396-100 MHz REAR-PANEL sinewave output 397-125 MHz REAR-PANEL sinewave output 1 ppm clock stability Extremely low phase noise carrier External amplitude modulation Frequency agility: FSK, ramped FSK, sweep, FM Trigger start phase control and breakpoints Built-in standard waveforms 396-Sequence generator 397-Separate sequence generators for each channel Multiple instrument synchronization with tight phase control 396-GPIB and RS232 Interfaces 397-GPIB, USB, and Ethernet Interfaces ArbExplorer Feature Highlights 396-Three powerful tools in one software package: complete Instrument control panel, Waveform composer and FM signal composer 397-Four powerful tools in one software package: complete Instrument control panel, Waveform, pulse, and FM signal composer 397-Detailed virtual front panels control all of the Instrument`s functions and modes Wave composer generates, edits and downloads complex waveforms FM wave composer generates and downloads complex modulating signals 397-Easy, onscreen generation of complex pulses using the pulse composer 396-Automatic detection of active instruments Equation editor generates waveforms from equations SCPI command and response editor simulates ATE operation Translates waveform coordinates from ASCII and formats Simplifies generation of complex sequences Features, Functions, and Options The following is a general description of the features, functions, and options available with the Instrument.
特点聚焦 397 双重输出排列以独立信号波形控制 397 紧的阶段垂距控制在渠道(1 个点决议之间) 14 位垂直分辨率近19 位垂距决议 396-1 兆欧记忆深度 397-4 兆欧记忆深度为各种渠道超快速的信号波形下载使用DMA 125 女士s 样品钟频 396-100 兆赫REAR-PANEL sinewave 产品 397-125 兆赫REAR-PANEL sinewave 产品 1 ppm 时钟稳定极端低阶段噪声载体外在调幅频率敏捷性：FSK，ramped FSK，打扫，FM 触发器起动阶段控制和转效点固定标准信号波形 396 序列发电器 397 分离序列发电器为各种渠道多仪器同步以紧的阶段控制 396-GPIB 和RS232 接口 397-GPIB，USB，并且以太网接口 ArbExplorer 特点聚焦 396-Three 强有力的工具在一个软件包：完成仪器控制板，信号波形作曲家和FM 信号作曲家 397-Four 强有力的工具在一个软件包：完成仪器控制板，信号波形，脉冲，并且FM 信号作曲家 397 详细的真正面板控制所有Instrument。。s 作用和方式波浪作曲家引起，编辑和下载复杂信号波形 FM 波浪作曲家引起和下载复杂调整的信号 397 容易，onscreen 复杂脉冲的世代使用脉冲作曲家活跃仪器的396 自动侦查等式编辑引起信号波形从等式 SCPI 命令和反应编辑模仿吃了操作翻译信号波形座标从ASCII 和格式简化复杂序列的世代特点，作用，并且选择下列是特点的概述，作用，并且选择可利用与仪器。
The simulator can simulate the distance and speed of the flight target. It simulates the target's speed by changing the carrier frequency of the signal generator and distance by programming the delay of radar video pulse.
该模拟器可对飞行目标的距离和速度进行模拟，以改变信号源的载频来模拟目标的多普勒频移，通过对雷达视频脉冲的可编程延时来模拟目标的距离变化。
In this paper, a new type of IF target simulator that is suitable for microwave radar system test is discussed. It simulates the target's velocity by changing the carrier frequency of the signal generator and distance by programming the delay of radar video pulse.
本文讨论一种适用于某微波雷达系统测试的中频目标模拟方法，改变信号源的载频来模拟目标的多普勒频移，通过对雷达视频脉冲的可编程延时来模拟目标的距离变化。
With the development of synchronous broadcasting technology, the synchronous carrier signal generator based on the homologous modulation technology and the frequency synthesis technology is becoming highly valued.
随着同步广播技术的发展，使用同源调制技术和频率合成技术制成的同步载波发生器越来越受到重视。