1-90
Making Measurements
Using Ripple Limits to Test a Device
Figure 1-69 Filter Passband with Ripple Test Activated
As the analyzer measures the ripple, a message is displayed indicating whether the measurement passes or
fails:
• If the ripple test passes, a RIPLn PASS message (where n = the channel number) is displayed in the
color assigned to Channel 1 Memory. The ripple test must pass in all frequency bands before the pass
message is displayed.
• If the ripple test fails, a RIPLn FAIL message (where n = the channel number) is displayed in red. The
portion of the trace that exceeds the user-specified maximum ripple value is also displayed in red.
Displaying the Ripple Limits
After the list of ripple limits has been set up, display the ripple test limits by pressing
from the Ripple Test Menu until ON is displayed on the softkey. Pressing this
softkey toggles the analyzer ripple limits display on and off. If the ripple limits are displayed and the ripple
test is off, the ripple limits are displayed near the top of the graticule and are not compared with the
displayed trace. However, once the ripple test is started, the ripple limits are displayed with respect to the
measured trace in the following manner:
• If the ripple test passes, the ripple limits are drawn on the display for each frequency band. Within each
frequency band, an upper and lower ripple limit is drawn such that they are equidistant above the upper
point of the measured trace and below the lower point of the measured trace.
• 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 1-70 shows the filter pass band tested with the ripple limits activated. Notice that there are three sets
To Next Page
Loading...
Need help?
General
