Agilent Technologies FieldFox N9912A User Manual page 42

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 46.
Phase is available only with S11 measurements – NOT S21.
Learn how to set Phase formats on page 40.
How to set Electrical Delay
 Press Scale / Amptd
 Then
 Then
 Enter a time value using the numeric keypad, the ▲|▼ arrows, or the rotary
 Press a multiplier key. Learn about multiplier abbreviations on page 18.
Electrical Delay can also be set using the Mkr->Delay feature. Learn how on page
129.
Phase Offset
Phase format is available only with S11 measurements. Learn more on page 40.
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.
42
Manually set the value of the reference line. Enter a negative
Ref Level
o
value by pressing Run/Hold (+/-) either before or after typing a value.
Manually set the position of the reference line. Values must be
Ref Position
o
between 0 (TOP line) and 10 (BOTTOM line)
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
knob.
N9912A FieldFox User's Guide