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Making Measurements
Using Bandwidth Limits to Test a Bandpass Filter
Using Bandwidth Limits to Test a Bandpass Filter
The bandwidth testing mode can be used to test the bandwidth of a bandpass filter. The bandwidth test
finds the peak of a signal in the passband and locates a point on each side of the passband at an amplitude
below the peak (that you specify during the test setup). The frequency between these two points is the
bandwidth of the filter. This bandwidth is compared to minimum and maximum allowable bandwidths that
you specify during the test setup.
This example shows you how to test the bandwidth of a bandpass filter. In this example, we will be testing
the pass band of a bandpass filter where the center frequency of the filter is approximately 321 MHz. Refer
to
Figure 1-73.
Figure 1-73 Bandpass Filter Being Bandwidth Tested
Setting Up Bandwidth Limits
When you set up the bandwidth limits to test the bandpass filter, you will first set up the analyzer to perform
the bandwidth test and then you will set up bandwidth limits of the bandwidth test.
Setting Up the Analyzer to Perform the Bandwidth Test
This section sets up the analyzer so that a bandpass filter can be easily viewed on the analyzer display.
1. Connect your filter as shown in Figure 1-74.
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