Arbitrary Waveforms Based on Front Panel of Agilent 33250A Function/Arbitrary Waveform Generator

Agilent 33200A family of function/arbitrary waveform generators are widely used in labs for creating arbitrary waveforms.Flexible applications of function/arbitrary waveform generator 33250A which is made by Agilent company are expatiated.There are three methods of transferring waveform data to arbitrary waveform generator 33250A,among which,the front panel method can produce a simple interface for arbitrary waveforms and is applicable to the composition of a small amount of linear waveform segment,and the progress of this method is explained in detail.This way is convenient and can be widely used,and it will offer some good guidance in library works.

Design of Arbitrary Waveform Generator Based on Virtual Instrument Technology

A design of arbitrary waveform generator using NI PXI-5412 module(an arbitrary waveform generator)was provided in this paper,based on virtual instrument technology and LabVIEW.The generator can produce standard function waveforms,such as sine,triangle,square wave with adjustable amplitude and frequency.It can also produce arbitrary waveforms of different data files importing by Analog Waveform Generator Software.A heart electric waveform was set as an example of arbitrary waveform generation.It has practical value,because the standard functions and heart electric waveforms generated by the generator can be used in laboratories.

A Novel Memory Compress Algorithm for Arbitrary Waveform Generator

A memory compress algorithm for 12\|bit Arbitrary Waveform Generator (AWG) is presented and optimized. It can compress waveform memory for a sinusoid to 16×13bits with a Spurious Free Dynamic Range (SFDR) 90.7dBc (1/1890 of uncompressed memory at the same SFDR) and to 8×12bits with a SFDR 79dBc. Its hardware cost is six adders and two multipliers. Exploiting this memory compress technique makes it possible to build a high performance AWG on a chip.

Photonic generation of arbitrary waveforms based on incoherent wavelength-to-time mapping

We demonstrate experimentally a radio frequency arbitrary waveform generator using the incoherent wavelength-to-time mapping technique. The system is implemented by amplitude modulation of a broadband optical resource whose spectrum is reshaped by a programmable optical pulse shaper and transmitted over a single mode fiber link. The shape of the generated waveform is controlled by the optical pulse shaper, and the fiber link introduces a certain group velocity delay to implement wavelength-to-time mapping. Assisted by the flexible optical pulse shaper, we obtain different shapes of optical waveforms, such as rectangle, triangle, and sawtooth waveforms. Furthermore, we also demonstrate ultra-wideband generation, such as Gaussian monocycle, doublet, and triplet waveforms, using the incoherent technique.

On-chip optical pulse shaper for arbitrary waveform generation

We propose and demonstrate a silicon-on-insulator （SOI） on-chip optical pulse shaper based on four-tap finite impulse response. Due to different width designs in phase region of each tap, the phase differences for all taps are controlled by an external thermal source, resulting in an optical pulse shaper. We further demonstrate optical arbitrary waveform generation based on the optical pulse shaper assisted by an optical frequency comb injection. Four different optical waveforms are generated when setting the central wavelengths at 1533.78 nm and 1547.1 nm and setting the thermal source temperatures at 23 ℃ and 33 ℃, respectively. Our scheme has distinct advantages of compactness, capability for integrating with electronics since the integrated silicon waveguide is employed.

Optical pulse shaper with integrated slab waveguide for arbitrary waveform generation using optical gradient force

Integrated optical pulse shaper opens up possibilities for realizing the ultra high-speed and ultra wide-band linear signal processing with compact size and low power consumption. We propose a silicon monolithic integrated optical pulse shaper using optical gradient force, which is based on the eight-path finite impulse response. A cantilever structure is fabricated in one arm of the Mach–Zehnder interferometer（MZI） to act as an amplitude modulator. The phase shift feature of waveguide is analyzed with the optical pump power, and five typical waveforms are demonstrated with the manipulation of optical force. Unlike other pulse shaper schemes based on thermo–optic effect or electro–optic effect, our scheme is based on a new degree of freedom manipulation, i.e., optical force, so no microelectrodes are required on the silicon chip,which can reduce the complexity of fabrication. Besides, the chip structure is suitable for commercial silicon on an insulator（SOI） wafer, which has a top silicon layer of about 220 nm in thickness.

基于AWG超宽带雷达信号测试系统的实现

传统的雷达信号测试系统常采用基带正交调制实现,但此类系统对幅相偏差所产生镜频的抑制能力比较有限(一般为-35dBc),且带内平坦度仅±3dBc。为了提高雷达信号的品质,提出一种超宽带雷达信号测试系统方案。系统使用泰克的AWG7082C任意波形发生器(简称AWG)中内嵌的RFXpress软件编辑生成中频信号,经超宽带数字上变频输出后给高速数字示波器进行采样、分析并校准,可得到复杂环境下的多种体制高品质雷达信号。经实验证明:该系统避免了基带正交调制的弊端,对镜频抑制可达-50dBc,经校准后的信号带内平坦度小于±1dBc,适应了多数超宽带雷达系统测试的需要。

基于VXI总线的新型AWG的设计

基于VXI总线的任意波形发生器是随着计算机技术和微电子技术在测试仪器中的应用而形成和发展起来的一类新型测试仪器。任意波形发生器的价值在于它能真正产生任意波形。文中提出了一种新型的任意波形发生器结构,介绍了基于VXI总线C尺寸任意波形发生器设计的全过程,开发了VXI总线寄存器基接口、用DDS技术设计了功能电路、开发了AWG的软面板、应用控制程序和仪器驱动器,所设计的任意波形发生器的特点是:高速、模块化、方便的波形输入以及和VXI资源相结合。该任意波形发生器模块已应用于模块化雷达自动测试设备中,能提供测试系统所需要的任何波形激励信号。

基于状态变量法的AWG软件设计与实现

基于状态变量法构建任意波形发生器软件框架,解决仪器软面板中触摸按钮的复用问题,详细介绍了系统状态图和状态表的设计及开发流程,给出了关键源代码.该方法优化了设计,使软件框架与具体功能相互分离,易于实现,便于升级.

基于FPGA的AWG的设计与实现

AWG在数字通信系统中的地位非常重要,其应用包括调制解调、上下变频、软件无线电等.提出了利用FPGA芯片,采用直接数字频率合成技术,完成对AWG的设计与实现.在架构设计上,采用自上而下的模块化设计方法,系统架构清晰,并具有较好的可移植性和重用性.经过设计和仿真测试,波形输出达到了技术要求.系统具有控制灵活、高速、性能良好、资源利用率低等优点.

基于AWG520的雷达信号模拟器

利用计算机软件控制任意波形发生器AWG520完成复杂雷达视频回波信号模拟,为雷达信号处理的功能验证和分系统调试提供了一种较先进的测试手段。

基于AWG/RTSA的PD雷达信号模拟和相参分析方法

针对脉冲多普勒(PD)雷达的回波特点和相参特点,分析了回波模拟的难点。在其传统回波模拟和相参分析方法基础上,结合现代电子测量仪器在任意波形产生和实时频谱技术的应用,提出了一种基于现代任意波信号发生器的PD雷达回波模拟方法和基于现代实时频谱分析仪的相参分析方法。经过实验验证,该方法可有效提高PD雷达的调试效率。

基于DDS的AWG波形噪声分析及对称性设计

本文分析了基于直接数字合成法（DDS）的任意波形发生器（AWG）波形中的噪声含量，并提出了对称性设计原则，以达到提高AWG性能价格比的目的。

AWG公式编辑软件的设计与实现

数学公式编辑是任意波形发生器(AWG)的波形编辑手段之一,它具有数学表达方便、生成信号精确等优点。文中基于编译原理的相关知识,给出了AWG公式编辑软件的设计与实现步骤,详细介绍了公式表达式的词法分析、语法分析、转换计算和结果存储表的设计方法,实现了多变量、多公式的同时编辑与计算。结果表明,该设计可靠灵活,计算效率高,具有较好的应用价值。

基于AWG的通信对抗背景信号产生方法

研究任意波形发生器(AWG)的工作原理及关键技术,介绍利用数字信号处理产生任意波形的理论依据,及对所用的AWG性能的要求。通过试验验证AWG产生复杂多变的背景多路信号的能力。

A dynamic optical arbitrary waveform generator based on cross phase modulation

In this paper, a dynamic optical arbitrary waveform generator(OAWG) based on cross phase modulation(XPM) is proposed. According to the characteristics of XPM, the nonlinear phase shift of signal can be changed along with the pump power. The amplitude of signal can be changed by controlling the phase shift at one arm of a Mach-Zehnder interferometer(MZI) using XPM effect between signal and pump. Therefore, the phase and amplitude of the optical frequency comb(OFC) can be controlled by two pump arrays. As a result, different kinds of waveforms can be synthesized. Due to the ultrafast response of XPM, the generated waveform could be dynamically updated with an ultrafast frequency. The waveform fidelity is affected by the updating frequency.

一种现场电磁信号还原试验方法

当应用在工业现场的电子设备遭受电磁干扰而失效时,实验室通常参照标准对电子设备开展试验寻找失效原因,此做法无法还原真实信号,难以评估电子设备的真实抗电磁干扰能力。针对还原真实电磁信号困难的情况,本文提出一种基于任意波发生器的现场电磁信号还原试验方法,利用示波器现场采集电磁环境信号波形数据,经过计算机处理,在任意波发生器中还原现场采集的电磁信号波形,并以电流注入、电压注入、磁场辐照和电场辐照四种加载方式验证电磁信号还原方法的有效性,为加强电子设备的现场抗电磁干扰能力提供技术基础。

用于宽带任意波发生器的可变增益放大器

在宽带任意波发生器(AWG)研制中,一个重要的挑战来自宽带可变增益放大器(VGA)。作为设备的信号输出接口电路,VGA承担了输出信号放大、共模电压调节、驱动负载等重要功能,在很大程度上决定了设备的综合性能。设计了一款适用于宽带AWG的VGA芯片,采用一种改进的数字增益调节架构,在兼顾带宽的同时,消除了模拟控制电压的影响,并确保了增益的单调性。芯片采用SiGe BiCMOS工艺实现,测试结果表明,芯片可以实现0.125~2倍的单调增益控制,最小增益步进约为0.125倍;在输入信号频率为4 GHz时的输出信号衰减为-2.83 d B。

Recent progresses on optical arbitrary waveform generation

This paper reviews recent progresses on optical arbitrary waveform generation （AWG） techniques, which could be used to break the speed and bandwidth bottle- necks of electronics technologies for waveform generation. The main enabling techniques for optically generating optical and microwave waveforms are introduced and reviewed in this paper, such as wavelength-to-time mapping techniques, space-to-time mapping techniques, temporal pulse shaping （TPS） system, optoelectronics oscillator （OEO）, programmable optical filters, optical differentiator and integrator and versatile electro-optic modulation implementations. The main advantages and challenges of these optical AWG techniques are also discussed.

基于FPGA的任意波形发生器设计

为了克服传统信号发生器结构复杂、便携性差、任意波形输出操作繁琐、户外测试供电难的不足,本文基于DDS技术,采用FPGA和STM32控制器设计了任意波形发生器,通过屏幕或上位机可以设置波形参数,频率相位可调,集成化程度高,采用直流供电,具有良好的便携性和易操作性。实验测试表明,所设计的任意波形发生器能够输出不失真的0.0291 Hz~500 kHz的常见波形以及任意波形,幅值可调、稳定度高,具有良好的频率范围和分辨率,能够满足实验室使用精度要求,方便现场试验,具有较高的实用价值。