  The measurements of the metrological characteristics (amplitude, width, and
shift in the magnetic field) of the dark pseudoresonance, which was proposed by
Kazakov et al. [quant-ph/0506167] as the reference resonance for an atomic
frequency standard, are reported. It has been shown that the characteristics of
the pseudoresonance are worse than those of the unsplit electromagnetically
induced transparency resonance for the excitation scheme with the lin||lin
polarization on the D1 line of the 87Rb atom.
