Dear all,
Pertaining this issue, i stumbled upon a website belonging to IFR and it is entitled Power Sensor Calibration System.
Trust me , it is a good read especially if you are burdened by power sensor calibrations.
I see the formula given to calculate the Cal factor,CF(for a device under test) is given by
CF =
[email protected]/
[email protected] *
[email protected]/
[email protected] * C(f)
Whereby:-
PI= Indicated power at frequency f
PR= Reference indicated power at frequecy f
C(f) = Cal data at frequency for standard head(splitter/reference detector combination)
CF= Measured calibration factor for DUT at frequency f
Assuming this formula holds and if i use the standard 1:1 comparison method against a gold sensor(reference standard) , i can somehow get the cal factor but i am a bit confused by the c(f) which is the cal data for standard head( i am using the splitter-11667A) .
I have the cal cert(i sent this to Agilent for an accreditated cal) of my splitter with me and i am blur to what values to look at to plug in the value.
For an example...
I have obtained the values of both the DUT and the reference standard at 50MHz and the corresponding values at 1 GHz which reads 0.99925mW,0.99995mW,1.000mW and 1.0041mW but i am blur of what to do when it comes to putting in the value of c(f).
Referring to my calibration cert of the 11667A, i see only the results for the tests input port SWR and output tracking test only...which values in which specific test should i take as the c(f)?
Furthermore, should i use the values in dBs or in watts to calculate the cal factor?
Also i see the cal factor values are all in percentage valus,any idea how we convert this ?
Appreciate if any of you can guide and shed some light on this problem that i am facing?
Or if any one of you can share some other methods or formula to help me calculate the cal factor, please feel free to share?
Appreciate the help and looking forward to your help.
Rgds
Ruben