公开(公告)号：JPH11252026A

公开(公告)日：1999-09-17

申请号：JP33507298

申请日：1998-11-26

Applicant: LUCENT TECHNOLOGIES INC

Inventor： RUCKI JOHN STANLEY ,  ZAPPALA CHRISTOPHER F ,  WEN JACK

IPC: H04B1/48 ,  H04B1/18 ,  H04B7/26 ,  H04B17/00 ,  H04B17/40 ,  H04Q7/22 ,  H04Q7/24 ,  H04Q7/26 ,  H04Q7/30 ,  H04Q7/38 ,  H04B17/02

Abstract: PROBLEM TO BE SOLVED: To perform the automatic channel assignment of a transmitter-receiver and to accurately decide an RF channel used in a service area. SOLUTION: Transmission signals are supplied through a transmission band- pass filter 304 to an antenna 305 and reception signals are supplied through a reception band-pass filter 306 to a receiver 307. An RF changeover array 311 composed of four RF switches normally interconnects the output of a transmitter 302 and the input of the receiver 307 corresponding to the respective modes of loop-back (self test) and sweep. In a normal mode, the antenna 305 is connected to the transmitter 302 and the receiver 307 respectively through the transmission band-pass filter 304 and the reception band-pass filter 306. Transmission and signal paths are mutually effectively interrupted by three serially connected open switches 311. In a loop-back mode, transmission output is connected to reception input. In a sweep, mode, the antenna 305 is connected through the transmission band-pass filter 304 to the receiver.