Electrical Delay; Phase Offset - Keysight N9923A FieldFox User Manual

Electrical Delay

Electrical delay is a mathematical function that simulates a variable length of lossless
transmission line. Use the electrical delay feature to compensate for the linear phase
shift through a device and view only the deviation from linear phase of the device.
You can set the electrical delay independently for each measurement trace. To apply
an electrical delay to all measurement traces, use Port Extensions. Learn how on
page 32.
How to set Electrical Delay
 Press Scale / Amptd
 Then
 Then
 Enter a time value using the numeric keypad, the ▲|▼ arrows, or the rotary knob.
 Press a multiplier key. Learn about multiplier abbreviations on page 19.

Phase Offset

Phase offset mathematically adjusts the phase measurement by a specified amount,
up to 360°. Use this feature in the following ways:
Improve the display of a phase measurement. This is similar to the way you would
change the reference level in an amplitude measurement. Change the phase
response to center or align the response on the screen.
Emulate a projected phase shift in your measurement. For example, if you know that
you need to add a cable and that the length of that cable will add a certain phase
shift to your measurement, you can use phase offset to add that amount and
simulate the complete device measurement.
You can set the phase offset independently for each measurement trace.
How to set Phase Offset
 Press Scale / Amptd
 Then
 Then
 Enter a value in degrees using the numeric keypad, the ▲|▼ arrows, or the rotary
28
Scale annotation on the
FieldFox screen
· Reference Line = red arrow
· Ref Level = –40 dB
· Ref Position = 1
· Scale = 2 dB per division
More
Electrical Delay
More
Phase Offset
knob. Press Enter
FieldFox User's Guide