Abstract: The signal detection system is an important part for BEPCII transverse feedback system. A commercial front-end RFTF (radio frequency front-end for transverse feedback system) was bought for this system. Two working modes and the remote control are its advantages. To test the performance and master the use of it, experiments on the BEPC with the bunch-by-bunch mode were carried out. The experiment results indicate that using this facility can acquire ideal wave for BEPCII while it doesn't work when the longitudinal instability emerges, the longitudinal instability must be suppressed.