HP HP 8712ES, Руководство пользователя, Страница: 164 / 507

4-30 ES User’s Guide
Using Instrument Functions
Using Limit Testing
To Create a Sloping Limit Line
A sloping limit line has different values for its begin and end limits. In
this example, you will create a sloping limit line between 130 MHz and
155 MHz with a beginning level of
−
35 dB and an ending level of
−
3 dB.
1. Press
.
2. Press .
3. Press .
4. Press .
NOTE
When creating limit lines, you can enter frequency and limit values
using the front panel knob or the
keys as well as the
numeric keypad.
Figure 4-16, “Limit Lines,” shows limit lines that dictate the specified
shape of a bandpass filter. In this example, a filter was connected to the
analyzer and tuned so that its response was within the created limit
lines. The pass/fail indicator gives constant feedback regarding test
status.
Prior Menu Add Limit Add Min Line
Begin Frequency 130 MHz
End Frequency 155 MHz
Begin Limit
−
35 Enter
End Limit
−
3 Enter