Why doesn't my log file (md.log) show the same parameters value as in parameter file (md.mdp)for generating alternating electric field in GROMACS?

01 January 1970 0 5K Report

I am trying to simulate alternating Electric Field in GROMACS. However, when I set up parameters for gaussian (E-zt) in my parameter file and do the MD production run, I get different values in the log file. Example:\

If my parameter file has:

E-z = 1 0.5 0

E-zt = 1.25e9 1.25e-9 100

But md.log file shows:

E-z:

n = 1

a = 5.000000e-01

phi = 0.000000e+00

E-zt:

n = 1

a = 2.500000e+08

phi = 1.250000e-09

Could anyone suggest me?

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