Patent ID: 7395060

Claim:
A signal testing system, adapted for testing at least a device-under-test while selectively connecting the system to a reference device externally, the signal testing system comprising: a first circulator, being connected to the reference device for receiving a reference signal transmitting therefrom; a second circulator, being connected to the device-under-test for receiving a testing signal transmitting therefrom; a first channel emulator, receiving a signal transmitted from the first circulator for simulating a first wireless transmission environment; a first power divider, receiving a signal transmitted from the first channel emulator for performing an operation of power assignment thereon while transmitting the divided signal to the second circulator; a second channel emulator, receiving a signal transmitted from the second circulator for simulating a second wireless transmission environment; a second power divider, receiving a signal transmitted from the second channel emulator for performing an operation of power assignment thereon while transmitting the divided signal to the first circulator; a first duplexer, for receiving signals transmitted from the first power divider and the second power divider in respective; and a signal analyzer, receiving and analyzing signals transmitted from the first duplexer; wherein, the first circulator generates a signal to be received by the reference device while receiving the divided signal transmitted from the second power divider; and the second circulator generates a signal to be received by the device-under-test while receiving the divided signal transmitted from the first power divider.