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同相正交调制（IQ 调制）是通信应用中使用的主要调制方案。 它之所以受欢迎，是因为它能高效利用带宽，满足这个数据量急剧增长的世界对带宽越来越迫切的需求。 使用仿真的 IQ 信号进行测试非常重要，因为设计人员在充斥干扰的频谱中总是会面临带宽不足的困境。
例如，设计人员需要测试其设计的极限性能，从而确保它们在真实环境中能够正常运行。 为此，他们必须首先生成一个理想信号来测试设计的理想性能。 因此，他们必须生成一个高品质的已知纯净信号。
他们可以通过调整两个通道之间的增益平衡以及每个通道的幅度偏移来仿真非理想的 IQ 信号。 他们甚至可以调整偏移，以皮秒级分辨率及时移动 I 或 Q 基带信号。 某些函数发生器支持您执行更先进的调制，将噪声、随机抖动或确定性抖动添加到信号中。
PathWave BenchVue software for waveform generators provides full-featured waveform creation software. This software enables engineers to take full advantage of signal generation capabilities to create custom waveforms quickly and easily. PathWave BenchVue Software is a PC application that provides easy-to-use creation tools such as a formula editor and waveform calculator and plotter...
View Full VersionA signal that looks very complex in the time domain behaves quite differently in the frequency domain. Time domain measurements show an impure sine wave. Without frequency domain measurements, it is still impossible to know the source and frequency of the second harmonic. Spectral analysis can show the spectral components individually, thus revealing the source of the interference. The information provided in the time domain (e.g., the signal pulse on...
View Full Version矢量网络分析仪可测量各种器件和网络，并针对各种使用场景提供了广泛的测量，例如频谱分析、脉冲测量、功率放大器（PA）表征和有源器件测试。 以下指南介绍了如何设置网络分析仪测量，校准测量系统和解释测量结果： VAN 的用途是如此广泛，以至于每种测...
View Full Version交流（AC）是一种极性周期性地反转并且幅度随时间不断变化的电流。 与直流（DC）电相比，交流电的发电和输电成本更低，效率更高，因此企业和住宅通常使用交流电。 在传输过程中，变压器可以通过提高或降低交流线路的电压，降低功率损耗。 交流电是一种家用电能——...
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