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高频合成信号源 HP 8657B 厂家：美国惠普 详细介绍pdf 频率范围 8657A : 100 kHz to 1040 MHz, 分辨力 10 Hz (无货) 8657B : 100 kHz to 2060 MHz, 分辨力 1 Hz 电平输出 范围 +13 to -143.5 dBm 精度 ±1 dB 分辨力 0.1 dB 调制 Simultaneous and mixed AM/FM modulation modes from internal (400 Hz and 1 kHz tones) and external sources 接口GPIB < 35 ms 频率开关速度 振幅偏移可同步调节 Amplitude offset and phase adjustment capabilities 反向功率保护: 50W 电子衰减器 0.3 GMSK Modulation Option The low residual FM and excellent phase noise performance of these signal generators make them ideal for many in-channel and even out-of-channel receiver tests. The 8657A/B is a versatile signal generator offering a variety of features, such as simultaneous and mixed modulation combinations of AM and FM, as well as a carrier phase adjust capability that allows you to characterize phase-sensitive devices.