This paper is concerned with performance evaluation for an experimental model of a repeater for broadband satellite communications. For the purpose of realizing a high speed and flexible internet satellite communication system, we propose a simplified configuration of satellite regenerative repeater. In this repeater, the amount of signal processing is limited so that the input signal is only AD converted and stored, but a complex function of error control is left to the earth stations. While the information data are modulated with QAM, the necessary information for the onboard routing is carried on the preamble potion placed at the top of the packet and modulated with the differential binary PSK. In this paper, measured results of the bit error rate for this simplified regenerative repeater are described