The RF signal source mainly acts as a stable local oscillator signal in the test, or generates various types of modulated signals, and the two-tone signal is used for signal excitation, receiving sensitivity testing and other applications. When choosing the RF signal source, the frequency range of the signal output, power requirement size, modulation type, frequency stability, amplitude accuracy and many other factors needs to be considered.

As Rigol's RF first signal source, the DSG3000 series offers standard AM/FM/ØM analog modulation, as well as options for I/Q modulation and I/Q baseband output. The instrument is available with maximum frequencies of either 3 GHz or 6 GHz. Featuring a high signal purity with phase noise measuring <-110dBc/Hz@20kHz (typical) and a wide output range of -130dBm to +13dBm, the DSG3000 RF signal generator has standard pulse modulation with an on/off ratio of up to 80dB, with optional pulse train generator available. The DSG3000 series also has an amplitude accuracy of