Making Transmission Response Measurements - Agilent Technologies 8753ET User Manual

Making Transmission Response Measurements

In this example measurement there are three components of the transmission response:
• RF leakage at near zero time
• the main travel path through the device (1.6 s travel time)
• the "triple travel" path (4.8 s travel time)
This example procedure also shows you how time domain analysis allows you to mathematically remove
individual parts of the time domain response to see the effect of potential design changes. This is
accomplished by "gating" out the undesirable responses. With the "gating" capability, the analyzer time
domain allows you to perform "what if" analysis by mathematically removing selected reflections and
seeing the effect in the frequency domain.
1. Connect the device as shown in
Figure 3-2 Device Connections for Time Domain Transmission Example Measurement
2. To choose the measurement parameters, press:
Preset
Trans: FWD S21 (B/R)
Meas
Start 119
Stop 149 M/
Scale Ref AUTO SCALE
3. Substitute a thru for the device under test and perform a frequency response correction. Refer to
6 , "Calibrating for Increased Measurement Accuracy."
4. Reconnect your device under test.
Figure 3-2.
or on ET models:
M/
Making Time Domain Measurements
Making Transmission Response Measurements
TRANSMISSN
Chapter
3- 5