The talk shall present an overview of the FCC beam instrumentation needs, the corresponding main challenges. This will review the different R&D activities being currently pursued, including Beam position and loss monitoring, Transverse and longitudinal monitoring systems as well as polarimetry and luminosity monitoring.

Electrical measurements of fast signals, as generated in particle accelerators, encounter severe limitations due to the high-frequency losses in RF transmission lines. This study describes measurements conducted with electro-optical modulators employing various radio-over-fibre techniques. Experimental data consist of different beam-generated signals, which underline the versatility of such a system. Signals from electromagnetic devices such as wall current monitors, as well as those captured from coherent transition radiation screens and coherent Cherenkov diffraction radiators, are presented. The potential deployment of such a remote sensing acquisition system in large-scale facilities is discussed.