1-86
Making Measurements
Using Ripple Limits to Test a Device
Deleting Existing Frequency Bands
Frequency band limits may be deleted for testing the ripple. This procedure guides you
through deleting existing frequency band limits. You may delete individual frequency
bands or delete all of the frequency bands from the list.
1. To access the ripple test edit menu, press:
2. Select the first frequency band (as an example, Frequency Band 3) to be deleted by
pressing:
3. Repeat step 2 until you have deleted the required frequency bands from the list.
4. If you need to delete all of the frequency bands, you can delete them all by pressing:
When this softkey is pressed, you will be asked to confirm that you want to delete all of
the frequency bands from the list.
5. After you have finished deleting the frequency bands, you can return to the ripple test
menu by pressing .
Running the Ripple Test
Once the list of ripple limits has been set up, you are ready to run the ripple test. From the
Ripple Test Menu, you can:
• Start and stop the ripple test.
• Display and hide the ripple test limit lines.
• Select a frequency band and display its ripple measurement in two ways:
❏the absolute measured ripple value
❏the margin which the measured ripple passes or fails the user-defined maximum
ripple value
Starting and Stopping the Ripple Test
Once the list of ripple limits has been set up, start the ripple test by pressing
from the Ripple Test Menu until ON is displayed on the softkey.
Pressing this softkey toggles the analyzer between ripple test on and ripple test off status.
Figure 1-67 shows the filter pass band (with the scale changed to 1 dB/division) being
ripple tested. Note that the filter fails the ripple test. The portions of the pass band trace
which do not meet the test requirements are displayed in red.
EDIT RIPL LIMIT
FREQUENCY BAND
3x1
DELETE
CLEAR LIST
DONE
RIPL TEST on OFF