The SPNH Synthesized Oscillator covers the frequency range of 20Hz to 20kHz, has a 5-digit digital display and a switching time of 50 ms. The output level is 4.25 mV to 42.5 V into 600 ohms digitally displayed on a 3-digit meter in mV, V, dBV or dBm. The instrument offers high spectral purity and stability in a compact package. It provides a low distortion sinewave output, square wave output and can be swept by an external signal in a selectable linear or log mode.