发明名称 |
Method of testing transceiver and transceiver including testing apparatus |
摘要 |
An ultra high frequency transceiver which transmits a modulated carrier wave and mixes a received signal with a locally generated signal to produce an intermediate frequency signal is tested by using the same transmitter as used during normal transceiver operation and by modulating the carrier with a wave having sudden transitions. A portion of the transmitted wave is reflected back to a receiver segment of the transmitter to produce an i.f. signal that is detected by a demodulator. Each transition causes the demodulator to detect a pulse signal. In response to the pulse signal being detected and not being detected during a testing interval, indications are derived to signal that the transceiver is and is not operating properly, respectively.
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申请公布号 |
US4361904(A) |
申请公布日期 |
1982.11.30 |
申请号 |
US19800170046 |
申请日期 |
1980.07.17 |
申请人 |
NISSAN MOTOR COMPANY, LIMITED |
发明人 |
MATSUMURA, AKIRA |
分类号 |
H04B1/50;H04B17/00;H04L27/02;(IPC1-7):H04B17/00 |
主分类号 |
H04B1/50 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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