3-7 VNA Key Functions - Measurement Menu (VNA Menus) Chapter 3 — Vector Network Analyzer
3-44 MS20xxA VNA Master UG 10580-00166 Rev. C
Auto Reference Plane Extension
Will use the current data to automatically determine the best length to mathematically
extend the reference plane (plane of calibration) to remove cable length from the
measurement, based on the current value of Propagation Velocity (see description for
the “Prop Velocity #” soft key below). The resultant display will “unwrap” phase
displays to allow a better view of the phase properties of the Device Under Test.
Ref Plane #.### mm
Allows the user to manually enter a distance to which the Reference Plane (Plane of
Calibration) will be extended. This will calculate and remove from the measurement
data an appropriate amount of linear phase rotation based on Propagation Velocity and
the distance entered here.
Prop Velocity #
Used by the Reference Plane Extension functions. Allows the user to enter the
propagation velocity of electrical signals in the cable length being removed by the
Reference plane extension calculations. Values are expressed as a decimal ratio
compared to the speed of light in a vacuum (e.g. 1 = speed of light, 0.5 = 1/2 the speed of
light).
Back
Returns to the previous menu.
10580-00166C.book Page 44 Thursday, February 21, 2008 12:52 PM
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