HP / Keysight / Agilent 339A Overview
The oscillator has a frequency range of 10Hz to 100kHz in four overlapping decade ranges. The output level is variable from less than 1 mV to greater than 3 V rms into 600 ohms with 10 dB/step level control and 10 dB vernier adjustment. Voltmeter range is 1 mV to 300 V RMS full scale (-60 dB to +50 dB full scale, meter calibrated in dBV and dBm into 600 ohms).