Measuring Electrical Length And Phase Distortion; Measuring Electrical Length; Device Connections For Measuring Electrical Length - Agilent Technologies 8719D User Manual

Measuring Electrical Length and Phase Distortion

Electrical Length
The analyzers mathematically implement a function similar to the mechanical "line stretchers"
of earlier analyzers. This feature simulates a variable length lossless transmission line, which
you can add to or remove from the analyzer's receiver input to compensate for interconnecting
cables, etc. In this example, the electronic line stretcher measures the electrical length of a
SAW iilter.
Phase Distortion
The analyzers allow you to measure the linearity of the phase shift through a device over a
range of frequencies and the analyzers can express it in two different ways:
deviation from linear phase
n
group delay
n

Measuring Electrical Length

1. Connect your test device as shown in Figure 2-33.
Figure 2-33. Device Connections for Measuring Electrical Length
2. Press 1Preset) and choose the measurement settings. For this example, the measurement
settings include reducing the frequency span to eliminate under sampled phase response.
Press the following keys as shown:
You may also want to select settings for the number of data points, averaging, and IF
bandwidth.
NETWORK ANALYZER
DEVICE UNDER TEST