Keysight Technologies 11644A K, User'S And Service Manual

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X, P, and K 11644A 3-7
User Information
Changing the ¼ Wavelength Shim Calibration Definition
Changing the ¼ Wavelength Shim Calibration Definition
The calibration kit definition data provided with this kit has a nominal value for the ¼ wavelength shim
offset delay. You may use the nominal value provided, or measure the exact thickness of the shim and use
that value to calculate its exact offset delay. Use the following procedure to change the nominal value of
the ¼ wavelength shim delay to reflect the specific device in your kit.
1. Load the calibration kit data into Cal Kit 1.
2. Using the formula below, calculate the offset delay:
NOTE The value of the propagation velocity in air is corrected for a temperature of 23

C, 50%
relative humidity, and 760 mm Hg of pressure.
length of 1
4
---wavelengh section (mm)
299.6953
mm
ns
----------(propagation velocity in air)
-------------------------------------------------------------------------------------------------------------- offset delay (ns) =