System tests with silicon strip module prototypes for the Phase-2-upgrade of the CMS tracker

To prepare the CMS experiment for the High Luminosity LHC and its instantaneous luminosity of 5 . 10³⁴ cm^-2s^-1, in the Long Shutdown 3 (around 2024) the CMS Silicon Tracker will be replaced. The Silicon Strip Modules for the new Tracker will host two vertically stacked sensors. The combination of hit information from both sensors will allow the estimation of the transverse momentum (p_T) of charged particles in the module front-end. This can be used to identify hits from potential interesting high-p_T tracks (above 2 GeV) for the first trigger level. The CMS Binary Chip (CBC) provides the analogue readout of two sensors and a digital section, into which the momentum discrimination is integrated. The modules will host a new DC-DC converter chain, which will allow individual powering of each module. First measurements with early prototypes on the interplay between DC-DC powering and the read-out functions of the module are presented in this talk.