Patent ID: 11913987
Assignee: ADVANTEST CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 20:
21. The automated test equipment according to claim 20, wherein the loopback is a first loopback permitting signal transmission between the first and second radio frequency ports in a first direction, and further comprising: a second loopback permitting signal transmission between the first and second radio frequency ports in a second direction opposite to the first direction, wherein the first switch is operable to couple the first radio frequency port to a first end of the second loopback when the first switch is set in a third switching state, and the second switch is operable to couple the second radio frequency port to a second end of the second loopback when the second switch is set in a third switching state, and wherein the loopback signal path is formed between the first and second radio frequency ports when the first and second switches are in the respective third switching state.