Tektronix AWG2021 User Manual page 551

Appendix F: Miscellaneous
F 4
f(x )
i-1
nx
x
i
Figure F 4: Equation Differentiation
The values at the first and last points are obtained not from the center deviation,
but from the following equations:
First point
) ) 4f (x
n{–3f (x
) [
1
f (x
1
2
Last point
n{f (x )–4f (x
) [
n–2 n–1
f (x
n
2
f(x )
i
f(x )
i+1
nx
)–f (x )}
2 3
) ) 3f (x
)}
n
x
n
AWG2021 User Manual