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安捷伦Agilent E4428C信号发生器操作流程

E4428C是安捷伦(现是德科技)生产的一款经典模拟信号发生器,频率覆盖 250kHz 至 6GHz,在射频 / 微波研发、生产、维修等领域中,以下就是Agilent E4428C信号发生器操作流程。Agilent E4428C操作流程开机与基础准备检查仪器连接:确认电源接线正确,接地良好,若需要输出连接到被测设备,请正确连接射频输出线缆。开机预热:按下前面板电源开关,等待仪器完成自检和初始化,建议预热30分钟以上,保证性能稳定,尤其是频率和电平精度。基础参数设置频率设置:直接按前面板[Freq](频率)按键,通过数字键盘输入目标频率值,再选择对应单位(kHz/MHz/GHz)确认即可完成设置,该仪器频率分辨率最低可达0.01Hz,支持高精度设置。功率设置:按前面板[Ampl](幅度/功率)按键,输入期望输出功率值,单位选择dBm确认,输出功率范围为1GHz下-136dBm~17dBm,6GHz下最高10~16dBm。调制信号设置该仪器支持AM、FM、ØM和脉冲四种调制方式,可同时启用多个调制,以常见的AM调幅设置为例:先设置好载波的频率和功率参数。按[SHIFT]键后点击对应调制功能按键(如调幅),屏幕出现AM标识即开启调制。进入调制设置菜单,设置调幅深度、调制源(可选择内部函数发生器),内部函数支持正弦波、方波、三角波、噪声等多种调制波形。设置完成后即可输出调制信号,可配合示波器观察波形。自定义波形设置(以负斜波为例)如果需要生成自定义特殊波形,可以按照以下步骤操作:按[SHIFT]按钮,再单击[Arb](任意波),屏幕会显示默认波形编号。通过方向键切换到目标波形(如负斜波对应NEG_RAMP),按下回车键确认选中。再次按[SHIFT],两次单击[Arb]完成波形加载。最后设置该自定义波形的频率和幅度即可输出。测试完成收尾先将输出功率下调到安全范围,关闭射频输出开关。按下电源键关闭仪器,拆除连接线缆,整理存放。
Key Words:Agilent E4428CE4428CE4428C信号发生器
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