Radio apparatus

Details Radio apparatus Radio apparatus

1995-06-28

1998-04-21

Chin, Wellington

Multiplex communications

Diagnostic testing

Loopback

370280, 370459, 370528, 455 674, H04J 312

Patent

active

057425892

ABSTRACT:
A radio apparatus according to a TDMA/TDD system uses its own transmitter and receiver so as to perform a loopback test for checking normality of the apparatus during a period of an unassigned slot. A loopback test signal is output from its own transmitter during an unassigned transmitting slot and is received by its own receiver. The signal is temporarily stored in a memory and is read during an unassigned receiving slot. The apparatus thus performs a loopback test. Since a loopback test can be performed by use of its own transmitter and receiver during an unassigned slot, a transmitting and receiving device (tester) specifically used for a loopback test is not required. Also, a loopback test can be carried out even while normal communications are being made.

REFERENCES:
patent: 4688208 (1987-08-01), Kawaguchi
patent: 4860281 (1989-08-01), Finley et al.
patent: 5157661 (1992-10-01), Kanai et al.
patent: 5231632 (1993-07-01), Yamao et al.
patent: 5239536 (1993-08-01), Masuko et al.
patent: 5260944 (1993-11-01), Tomabechi
patent: 5265089 (1993-11-01), Yonehara
patent: 5481186 (1996-01-01), Heutmaker et al.
patent: 5521904 (1996-05-01), Eriksson et al.

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