HP339A Distortion Analyzer, 10 Hz to 110 kHz
With the HP 339A, a complete distortion factor measuring set is available. The inserted "bridged t" oscillator covers the range from 10 cycles per second to 110 kHz. In addition, the HP339A replaces a True RMS voltmeter within the range 1 mV to 300V for full-scale. For the evaluation of the unwanted signals, two active high-pass filters and an active low-pass filter are insertable. The measuring bridge supports "auto set level" and "auto zero". A manual calibration on reference levels and the respective frequency is not necessary with this 339A. Only the input attenuator must be adjusted in 10 dB steps, which is indicated by two LED (level too highly, and/or too deeply). The unwanted distortion signals can be displayed over a front jack on an oscilloscope.
