HP HP 8712ET, User Manual, Page: 147 / 480

ET User’s Guide 4-29
Using Instrument Functions
Using Limit Testing
To Create a Flat Limit Line
In this example, you will create a minimum limit line from 155 MHz to
195 MHz at a level of
−
3 dB.
1. To access the limit line menu, press .
2. To create a new minimum limit line, press
.
3. Press , and enter .
4. Press , and enter .
5. Press , and press .
6. Press , and press .
7. Notice that the analyzer has generated a limit line at about the
center of the display.
8. To get a less distracting view of the limit line, press
to toggle the graticule off.
9. To see if your filter meets the minimum limit you have just set up,
press .
10. The display will now indicate whether the DUT has passed or failed
when compared to the current limits. If you are using the filter that
was shipped with your instrument, you should see a PASS indicator.
To edit a current limit line and to see what a fail indicator looks like,
press
and set the and to
0 dB.
11. Notice the display now shows the FAIL indicator.
NOTE
You can move the position of the pass/fail indicator, turn on or off the
pass/fail text, and turn on or off the fail icon in the limit options menu.
Press
. For more
information, see “Customizing the Display” on page 4-45 .
12. Before continuing to the next section, edit the limit line to change it
back to having a begin and end limit of
−
3 dB.
DISPLAY
Limit Menu
Add Limit
Add Min Line
Begin Frequency 155 MHz
End Frequency 195 MHz
Begin Limit
−
3 Enter
End Limit
−
3 Enter
DISPLAY
More Display Graticule ON off
Prior Menu Limit Menu Limit Test ON
Edit Limit Begin Limit End Limit
DISPLAY
Limit Menu Limit Options