App-14
IM AQ6370D-01EN
Appendix 3 Details of Each Analytical Functions
POWER Analysis Function
This function allows the user to add up level values of measured waveforms, thereby
enabling the calculation of total power. It would be more convenient if the between line
markers search function and the zoom area search function were also used for the
POWER analysis.
Following table shows the details of the parameters for POWER analysis.
Parameter Abbreviation Default Value Setting Range Unit Description
POWER OFFSET OFST 0.00 −10.00 to 10.00 dB Compensation value in
power measurement
Algorithms for the analysis are as follows.
• Obtain actual wavelength resolutions for all display points. (Use the table to interpolate
the values for λx = λSHIFT + λOFST.)
While in the vacuum wavelength mode (MEAS WL AIR/VACUUM soft key in the SET
UP), use the following equation to obtain λx.
λ0 = λ + λSHIFT
λx = λ0 / N(λ0) + λOFST
If the display mode on the X axis (HORIZON SCALE nm/THz soft key in the SET UP)
is the frequency display mode, use the equation below to convert an actual resolution
(frequency) Ri for all display points to a wavelength value.
Ri = (λi x λi x Rfi)/C
λi : Wavelength (nm) at each point
Rfi : Actual resolution(THz)
C : Speed of light in the vacuum(2.99792458 x 10
8
[m/s])
• Set the actual resolution for the ith point to Ri, while setting the level to Li.
• Obtain the total power in the equation below.
∑
x
Ri
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