The MG3671B is a 300 kHz to 2750 MHz signal generator providing a stable and precise output as well as spectrum purity up to a maximum output of +13dBm, even with modulation. In addition to testing receiver sensitivity and excess input, it can be used for testing IF stage performance and for evaluating device quality. A CMOS-level mode is provided for I/Q signal input. Input frequency band covers the CDMA spread spectrum band, expanding the range of applications.