Comparing Spectrum Analyzers: GPSA vs RTSA

Oscilloscopes and spectrum analyzers are essential tools for measuring electric signals. Oscilloscopes display signal data in the time domain on a screen, while spectrum analyzers represent signal intensity in the frequency domain. Although modern oscilloscopes can handle high-frequency signals in the gigahertz range, they struggle with increasing noise floors as frequency rises, making it difficult to detect low-intensity signals like harmonics or spurious signals.

Spectrum analyzers excel in such scenarios by providing a clearer distinction between weak signals and background noise. The most advanced spectrum analyzers can measure a wide frequency range, from kilohertz to tens of gigahertz, offering better precision when working with high-frequency signals. Some spectrum analyzers also specialize in optical applications, such as monitoring fiber-optic signals, further expanding their utility beyond traditional electronic signal measurement.

Learn why spectrum analyzers are the preferred tool for applications where precision and clarity are critical. Because they can accurately detect and analyze complex high-frequency signals, they surpass the limitations of oscilloscopes at higher frequencies.