Figure 1-10. Hewlett-Packard, Model C41-334A, Spectrum Analyzer
Hewlett-Packard, Model C41-334A, Spectrum Analyzer (fig. 1-10) is a solid-state instrument for measuring distortion of ac
voltages. Model 334A measures distortion levels of 0.1 percent to 100 percent full-scale in seven ranges for any
fundamental frequency of 5 Hz to 500 kHz. High sensitivity requires only 0.3 V rms for the 100 percent set level reference.