User`s guide

Gyro Control Unit (GCU)
User’s Guide
23
MaxMetrix, Scottsdale, AZ
PN: GCU-2K1-UG:RevI.2 NGC
4.1.3 THE SPECTRUM ANALYZER
The Spectrum Analyzer tab provides the user a full featured Spectrum Analyzer to evaluate system
frequency peaks and noise in the power spectrum of the gyroscope being evaluated. This is accomplished
by collecting a one second sample buffer and then calculating the power spectral density estimation (PSDE)
using a Fast Fourier Transform. This allows the user to place he lowpass and notch filters in the best
locations to reduce system noise in the output signals. Figure 16 shows an 800Hz peak that is not being
addressed by any of the notch filters; Figure 17 illustrates the effect of placing an 800Hz notch filter to
reduce this tonal.
Figure 19
Spectrum Analyzer with 800Hz notch filter turn OFF