  The Apache Point Observatory Galactic Evolution Experiment (APOGEE) has
observed the H-band spectra of over 200 000 stars with $R\sim22 000$. The main
motivation for this work is to test an alternative method to the standard
APOGEE pipeline (APOGEE Stellar Parameter and Chemical Abundances Pipeline,
ASPCAP) to derive parameters in the Near-InfraRed (NIR) for FGK dwarfs.
\textit{iSpec} and \textit{Turbospectrum} are used to generate synthetic
spectra matching APOGEE observations and to determine the parameters through
$\chi^2$ minimization. We present spectroscopic parameters ($T_\mathrm{eff}$,
$[M/H]$, $\log g$, $v_{mic}$) for a sample of 3748 main-sequence and subgiant
FGK stars, obtained from their APOGEE H-band spectra We compare our output
parameters with the ones obtained with ASPCAP for the same stellar spectra, and
find that the values agree within the expected uncertainties. A comparison with
the optical samples California Planet Survey, HARPS-GTO (High Accuracy Radial
Velocity Planet Searcher - Guaranteed Time Observations), and PASTEL, is also
available, and median differences below 10 K for $T_\mathrm{eff}$ and 0.2 dex
for $[M/H]$ are found. Reasons for these differences are explored. The full
H-band line-list, the line selection for the synthesis and the synthesized
spectra are available for download, as well as the calculated parameters and
their estimated uncertainties.
