Functions and Measurements
Measuring Stop Band Attenuation of a Lowpass Filter
62
11 In this example, the attenuation over this frequency range is
- 17.98 dB/octave (one octave above the cutoff frequency).
12 Use the front- panel knob to place the marker at the highest
peak in the stop band to determine the minimum stop band
attenuation. In this example, the peak occurs with Delta of
563 MHz. The attenuation is - 60.93 dB. See Figure 3-21
.
Figure 3-21 Minimum Stop Band Attenuation
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