RIGOL
Chapter 2 Functions of the Front Panel
2-38
VNA User Guide
Sweep Point = 1 + Stop Distance * (span/1.5e8/Velocity Factor) (rounding up the
number)
Velocity Factor
Sets the Velocity Factor of cable under test relative to the velocity of light in the
vacuum.
Please ensure that the Velocity Factor of the cable under test conforms to the actual
situation, otherwise, the positioning location measured is inaccurate.
Table 2-43 Velocity Factor
Parameter
Remarks
Default
0.66
Range
0.1 to 1
Unit
N/A
Knob Step
0.1
Left/Right Arrow Key Step
Up/Down Arrow Key Step
at 1-2-5 step
Port Specific Loss
Sets the cable loss for the port.
Table 2-44 Cable Loss
Parameter
Remarks
Default
0.00 dB/m
Range
0.00 dB/m to 5.00 dB/m
Unit
dB/m
Knob Step
0.1 dB/m
Left/Right Arrow Key Step
Up/Down Arrow Key Step
at 1-2-5 step
FFT Window
Sets the type of the FFT window function.
Five FFT window types are available for RSA: Rectangular (default), Hanning,
Gaussian, Flattop, and Hamming.
You can select a proper filter type by referring to the following table according to the
actual measurement requirements.
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