Measuring Phase Distortion - Agilent Technologies 8753ET User Manual

Making Measurements
Measuring Electrical Length and Phase Distortion

Measuring Phase Distortion

This portion of the example shows you how to measure the linearity of the phase shift over
a range of frequencies. The analyzer allows you to measure this linearity and read it in two
different ways: deviation from linear phase, or group delay.
Deviation From Linear Phase
By adding electrical length to "flatten out" the phase response, you have removed the
linear phase shift through your device. The deviation from linear phase shift through your
device is all that remains.
1. Follow the procedure in
2. To increase the scale resolution, press:
SCALE DIV
Scale Ref
panel keypad.
3. To use the marker statistics to measure the maximum peak-to-peak deviation from
linear phase, press:
Marker Fctn MKR MODE MENU
4. Activate and adjust the electrical delay to obtain a minimum peak-to-peak value.
NOTE It is possible to use delta markers to measure peak-to-peak deviation in only
one portion of the trace. See
Data" on page
Figure 1-36 Deviation from Linear Phase Example Measurement
1-46
"Measuring Electrical Length" on page
and turn the front panel knob, or enter a value from the front
STATS ON
"To Calculate the Statistics of the Measurement
1-42.
1-43.