The E8257D PSG from Keysight Technologies is an Analog Signal Generator that operates from 250 kHz to 67 GHz with a 0.01 Hz resolution. The generator frequency range can be extended as high as 1.1 THz by using frequency extender modules. It can generate signals with an output power from -20 to 15 dBm, low phase noise and supports various modulation types like AM, FM, Phase, and pulse modulation. The bench-top device measures 178 x 426 x 515 mm and has a BNC (F) connector.