高頻合成信號源 HP 8657B 廠家：美國惠普 詳細介紹pdf 頻率范圍 8657A : 100 kHz to 1040 MHz, 分辨力 10 Hz (無貨) 8657B : 100 kHz to 2060 MHz, 分辨力 1 Hz 電平輸出 范圍 +13 to -143.5 dBm 精度 ±1 dB 分辨力 0.1 dB 調制 Simultaneous and mixed AM/FM modulation modes from internal (400 Hz and 1 kHz tones) and external sources 接口GPIB < 35 ms 頻率開關速度 振幅偏移可同步調節(jié) Amplitude offset and phase adjustment capabilities 反向功率保護: 50W 電子衰減器 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.