I
-
I
-
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. For
example, 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
Prior
Menu Add Limit Add Min Line Begin Frequency
113o)m.
2.
Press
Emd
Frequsnry
@
MHz .
3.
Press
B%@n
Limit
1-35)
titer.
4.
Press End Limit
(--3)
Enter.
NOTE
When creating limit lines, you can enter frequency and limit values using the front panel knob or the
m
@)
keys
as well as the numeric keypad.
Figure 4-16 shows limit lines created that dictate the specified shape of a
bandpass filter. In this example, a hlter was connected, and tuned to fall
within the created limit lines. The pass/fail indicator gives constant feedback
regarding status.
4-32
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