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Making Measurements
Using Ripple Limits to Test a Device
• If the ripple test fails, the ripple limits are drawn on the display for each frequency
band. Within each frequency band, the lower ripple limit is drawn at the lowest point on
the measured trace and the upper ripple limit is drawn at the user-specified maximum
ripple value above the lower ripple limit. The ripple that exceeds the maximum ripple
value extends above the upper limit. This measured trace that extends above the upper
limit is displayed in red.
Figure 1-68 shows the filter pass band tested with the ripple limits activated. Notice that
there are three sets of ripple limits shown. Also notice that the measured trace exceeds the
upper ripple limit only in Frequency Band 3.
Figure 1-68 Filter Pass Band with Ripple Test and Ripple Limits Activated
Changing the Ripple Limits Line Color. The color of the lines that represent the
ripple limits can be changed by:
1. pressing the key
2. pressing
3. pressing and turning the analyzer front panel knob until
the desired color appears (You may also use the step keys or the numeric keypad
instead of the front panel knob to change the color.)
Checking the Ripple Value
Once the ripple test has been started and is running, you may display the ripple value of
each frequency band in one of two formats, the absolute format or the margin format. Both
formats are described in this section.
Display
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