Millimeter-Wave (mm-wave) communications, as any other emerging technology, require suitable experimentation platforms that allow validation of concepts and field tests in both academic and research environments. Existing experimentation platforms for mm-wave systems are based on: i) Commercial-Off-The-Shelf (COTS) devices or ii) expensive proprietary hardware platforms. In this paper we propose a mixed software-hardware testbed for mm-wave experimentation using Software Defined Radio (SDR) devices. Specifically, we handle the design and implementation of the hardware processing blocks required to decode the preamble of Single Carrier (SC) IEEE 802.11ad compliant frames, working at a scaled-down bandwidth, along with their integration in X310 USRP devices using the GNU Radio/RFNoC framework and 60GHz transceivers. The testbed is validated for indoor environments under different channel conditions performing Channel Impulse Response (CIR) measurements. The design exploits the maximum bandwidth for X310 devices and leaves enough FPGA logic space (50%) to further upgrade and extension of the proposed system.