Top: the Ca II H and K region of the normalized spectrum of TYC 2834-1385-1 obtained on 2025 October 6. The double-peaked emission in both the H (right) and K (left) lines is characteristic of active chromospheres in both stars. The stronger emission peaks correspond to the primary stellar component. Bottom: phase-folded radial-velocity fit of TYC 2834-1385-1. The plotted data points are derived from fits to the average metal-line profile. The corresponding Ca II H and K measurements are consistent with these values within their uncertainties.