Specifications

Chapter 13 115
Stimulus Response Measurements (ESA Options 1DN and 1DQ)
Calculating the N dB Bandwidth Using Stimulus Response
Stimulus Response Measurements
(ESA Options 1DN and 1DQ)
Step 5. Put the sweep time of the analyzer into stimulus response auto coupled
mode:
Press
Sweep, Swp Coupling (SR).
Auto coupled sweep times are usually much faster for stimulus
response measurements than they are for spectrum analyzer (SA)
measurements. If necessary, adjust the reference level to place the
signal on screen.
Step 6. Activate the N dB bandwidth function (See Figure 13-4):
Press
Peak Search, More, N dB Points (On).
Figure 13-4 AM Signal Measured in the Time Domain
LEFT: N dB Bandwidth Measurement at
−3 dB
RIGHT: N dB Bandwidth Measurement at
−60 dB
NOTE The knob or the data entry keys can be used to change the N dB value
from −3dB to −60 dB to measure the 60 dB bandwidth of the filter.
Step 7. Turn off the N db Points measurement:
Press
N dB Points (Off).