IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
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| 출원번호 |
US-0829802
(1992-01-31)
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발명자
/ 주소 |
- Weiss Kenneth P. (Palatine IL) DeRango Mario F. (Lake Zurich IL) Schroeder Daniel R. (Carol Stream IL) Mutz Leslie D. (Barrington IL) Lacy Brian W. (Addison IL) Chapman Mark D. (Marengo IL)
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| 출원인 / 주소 |
- Motorola, Inc. (Schaumburg IL 02)
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| 인용정보 |
피인용 횟수 :
41 인용 특허 :
0 |
초록
▼
The present invention includes an apparatus and a method for transceiver self-diagnostic testing in a communication system. A feedback unit (228, 326) is utilized that allows performance of a loopback test independent of a transmit frequency to receive frequency difference without undue proliferatio
The present invention includes an apparatus and a method for transceiver self-diagnostic testing in a communication system. A feedback unit (228, 326) is utilized that allows performance of a loopback test independent of a transmit frequency to receive frequency difference without undue proliferation of circuitry.
대표청구항
▼
Apparatus for transceiver self-diagnostic testing in a communication system, comprising at least: transmitter-control unit-receiver means, comprising at least a transmitter, a control unit, and a receiver, wherein the transmitter is operably coupled to send at least a first signal having a carrier f
Apparatus for transceiver self-diagnostic testing in a communication system, comprising at least: transmitter-control unit-receiver means, comprising at least a transmitter, a control unit, and a receiver, wherein the transmitter is operably coupled to send at least a first signal having a carrier frequency and, where selected, a modulated data bit test pattern, to a switching means, the control unit is operably coupled to provide control signals to at least one of: the transmitter, the receiver, and a feedback means that provides at least a first feedback signal, and the receiver is operably coupled to receive the at least first feedback signal of the feedback means and to receive at least a first transmitted signal having a carrier frequency, (A) wherein the switching means is operably coupled to the control unit and one of (A1)-(A2): (A1) a duplexing means that is operably coupled to a single antenna, and (A2) a first antenna, for controlling transmission of at least the first signal to the operably coupled antenna, (B) where the duplexing means is selected, the duplexing means is operably coupled to the switching means, to the single antenna, and to the receiver, for permitting alternate transmission and reception by the antenna, (C) the feedback means is operably coupled to the transmitter for providing a feedback signal that has a frequency that is substantially one of (C1)-(C2): (C1) a difference between the first signal carrier frequency and a predetermined difference frequency between the first signal carrier frequency and the received signal carrier frequency, and (C2) a predetermined loopback frequency common to the transmitter and the receiver, (D) the control unit is operably coupled to the transmitter, to the receiver, to the feedback means, for, where at least one of the transmitter and the receiver further includes a synthesizer, (D1) opening the switching means for a preselected test time period, (D2) automatically programming the synthesizer(s) for providing an adjusted carrier frequency to at least one of the transmitter and the receiver for maintaining a predetermined difference frequency between the first signal carrier frequency and the received signal carrier frequency, and (D3) where both the transmitter and the receiver each have a synthesizer, the synthesizers providing a predetermined loopback frequency to the transmitter and the receiver, (D4) where the switching means is open (preventing transmission), setting the feedback means to provide a feedback signal that is one of (D4a-D4b): (D4a) the difference between the first signal carrier frequency and a predetermined difference frequency between the first signal carrier frequency and the received signal carrier frequency, and (D4b) the predetermined loopback frequency common to the transmitter and the receiver, (D5) such that the control unit monitors one of (D5a-D5b): (D5a) a difference between transmitted test information and received test information, and (D5b) a magnitude of the feedback signal accepted by the receiver.
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