You are designing a DAS system that has a requirement to supply both RF signal and power to the remote transceivers in the system. Which cable will provide the needed services for this application?

Multimode optical fiber transmits light-based signals only and is a non-conductive medium that cannot supply DC electrical power to remote transceivers.

Radiation (leaky) coaxial cable is designed to radiate RF signals along its length but cannot carry DC power to remote units.

Shielded twisted-pair (STP) copper cable can carry both electrical signals and DC power on the same conductors, satisfying the dual requirement of signal delivery and power supply to remote DAS transceivers. Power over Ethernet (PoE) standards leverage this copper-conductor capability, making STP the correct choice when remote units need both connectivity and power without a separate dedicated power feed.

Single-mode optical fiber, like multimode, is non-conductive and physically incapable of supplying electrical power alongside the optical signal.

ScTP (screened twisted pair) has only an overall foil shield rather than per-pair shielding, providing less isolation from the co-channel RF interference common in multi-signal DAS environments than full STP.