Atec Tektronix-RSA3000B Instrukcja Użytkownika Pobierz pdf (Strona 3)

Spectrum Analyzers — RSA3000B Series

Unlike a conventional VSA’s capability of quantifying the modulation quality only at the

center frequency, the RSA3000B Series can demodulate a captured off-center hopped

signal with view of the spectrogram (upper left), frequency versus amplitude (upper right),

signal modulation quality (lower left) and Constellation (lower right).

The R

SA3000B Series also provides automatic measurement of the frequency settling

time

with the built-in Modulation Domain analyzer.

A Frequency Mask Trigger (FMT) was set to monitor the frequency domain for any

changes in the spectrum, and it triggered on transient interference. The spectrogram

(lower display) shows the time relationship between the desired good signal and the

interfering transient signal. The spectrum display shows what was happening at the

precise moment the interfering signal was present in the band. FMT is an essential tool for

capturing interfering and unauthorized signals in the presence of desired emitters.

The A

udio Spectrum and Spectrogram allow designers to understand the nature of

dist

ortion by viewing harmonics and nonharmonic components over time. Distortion

para

meters are calculated for each FFT frame in the Spectrogram display.

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Atec Tektronix-RSA3000B Instrukcja Użytkownika Strona 3