高频合成信号源 HP8657A 厂家: 美国惠普 频谱范围 100 kHz 至 1040 MHz 电子衰减器 ** 35 ms 的频率开关速度 调制功能 AM FM 电平范围 +13 至 -143.5 dBm 电平精度 ±1 dB (typically ±0.5 dB) Amplitude 偏置 和 phase 相位调节功能 0.3 GMSK 调制选件 The low residual FM and excellent phase noise performance of these ** generators make them ideal for many in-channel and even out-of-channel receiver tests. The Agilent 8657A is a versatile ** 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.