47 SNA5000A Vector Network Analyzer User Manual
Speed coefficient:
Specify the velocity factor applied to the device media inserted after
measurement calibration. The value is 0.66 for polyethylene insulated
cables and 0.7 for PTFE insulators.1 corresponds to the speed of light in
a vacuum.
Distance unit:
Select meters, inches, or feet. When you change this value, the step size does
not change automatically.
2.7.4
Amplitude offset and amplitude slope
The "amplitude offset" allows the amplitude (rather than phase) data to be offset by a fixed
or slope value in Db. The amplitude offset setting affects only the work trace. If the display
format is "Linear Amplitude" or "Real Number" (unitless), the dB is converted and the correct
offset is implemented.
Operating steps:
Press
Scale
, use the knob or arrow keys to bring focus to the
Constants
→
Mag Offset/
Mag Slope
parameter item.
Press
ENTER
or Knob to enter the editing state. After the editing is completed, move the
cursor to the specified position by up and down direction keys or Knob. Press
ENTER
or Knob
to select the current option.
Amplitude deviation:
Offset the entire data trace at the specified value.
Margin slope:
Offset the data trace by some value that changes with frequency. The offset
slope starts at 0 Hz.
2.7.5
Phase deviation
Phase offset mathematically adjusts the phase measurement to a specified degree (up to
360°). This feature can be used in the following ways:
•
Improved display of phase measurements. This is the same way as changing the
reference level in the amplitude measurement. Change the phase response to the center
or align the response on the screen.
•
Simulate Projection phase shift in measurements. For example, if you know that you need
to add a cable and that the length of the cable will add a certain phase shift to the
measurement, you can use a phase shift to increase the length and simulate the entire
device measurement.
Key operation:
Press
Scale
, use the knob or arrow keys to bring focus to the
Constants
→
Phase Offset
parameter item. Press
ENTER
or Knob to enter the editing state. After the editing is completed,
move the cursor to the specified position by up and down direction keys or Knob. Press
ENTER
or Knob to select the current option.
Summary of Contents for SNA5000A Series
Page 2: ......