1-75
Making Measurements
Using Limit Lines to Test a Device
• To create a limit line that tests the high side of the bandpass filter, press:
Figure 1-60 Example Flat Limit Lines
Creating a Sloping Limit Line This example procedure shows you how to make limits that test the shape factor of a SAW
filter. The following limits are set:
Frequency Range Power Range
123 MHz to 125 MHz −65 dB to −26 dB
144 MHz to 146 MHz −26 dB to −65 dB
ADD
STIMULUS VALUE
146
M/µ
UPPER LIMIT
−65 x1
LOWER LIMIT
−200 x1
DONE
LIMIT TYPE
FLAT LINE
RETURN
ADD
STIMULUS VALUE
160
M/µ
DONE
LIMIT TYPE
SINGLE POINT
RETURN