Specifications

116 Chapter 13
Stimulus Response Measurements (ESA Options 1DN and 1DQ)
Measuring Stop Band Attenuation Using Log Sweep (ESA-E Series)
Stimulus Response Measurements
(ESA Options 1DN and 1DQ)
Measuring Stop Band Attenuation Using Log
Sweep (ESA-E Series)
When measuring filter characteristics, it is useful to look at the
stimulus response over a wide frequency range. Setting the analyzer
x-axis (frequency) to display logarithmically provides this function.
The following example uses the tracking generator to measure the stop
band attenuation of a 10 MHz low pass filter.
Step 1. To measure the response of a low pass filter, connect the equipment as
shown in Figure 13-5. This example uses a 10 MHz low pass filter.
Figure 13-5 Transmission Measurement Test Setup
Step 2. Perform a factory preset:
Press
Preset, Factory Preset (if present).
Step 3. Set the start and stop frequencies:
Press
FREQUENCY Channel, Start Freq, 100, kHz.
Press
FREQUENCY Channel, Stop Freq, 1, GHz.
Press
FREQUENCY Channel, Scale Type (Log).
Step 4. Set the resolution bandwidth to 10 kHz:
Press
BW/Avg, Res BW, 10, kHz.
Step 5. For E4407B analyzers with option UKB, set the input coupling to DC:
Press
Input, Coupling (DC).
Step 6. Turn on the tracking generator and if necessary, set the output power to
–10 dBm:
Press
Source, Amplitude (On), –10, dBm.
CAUTION Excessive signal input may damage the DUT. Do not exceed the
maximum power that the device under test can tolerate.