HP 8753E User Manual page 99

5. To terminate the flat line segment by establishing a single point limit, press:
Figure 2-41 shows the flat limit lines that you have just created with the following
parameters:
stimulus from 127 MHz to 140 MHz
n
upper limit of -21 dB
n
lower limit of -27 dB
n
6. RI create a limit line that tests the low side of the filter, press:
248 Making Measurements
Figure 2-41. Example Flat Limit Line