Which of the following parameters does a spectrum analyzer display on the vertical and horizontal axes?
Signal amplitude and time
Signal amplitude and frequency✓الإجابة الصحيحة
SWR and frequency
SWR and time
الشرح
A frequency-domain instrument sweeps a tuned receiver across a frequency span and plots the detected power, so frequency runs along the horizontal axis and amplitude up the vertical axis. Amplitude against time is an oscilloscope display, and SWR appears on neither axis.