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題名 | 微波無線電鏈路收訊機收訊位準之測量校準= |
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作者 | 洪健藏; 江長晉; |
期刊 | 電信研究 |
出版日期 | 19910300 |
卷期 | 21:1 1991.03[民80.03] |
頁次 | 頁113-116 |
分類號 | 448.81 |
語文 | chi |
關鍵詞 | 收訊; 收訊機; 位準; 測量; 無線電; 微波; 鏈路; |
中文摘要 | 本文乃就現有正在營運中的十一條微波無線電鏈路收訊機,提出收訊位準測量校準之方法,並就各微波無線電錄路收訊機收訊位準測量校準之結果,加以分析與討論。實際測量校準收訊機收訊位準,發現不論任何鏈路收訊機,其輸入信號功率位準與自動增益控制之電壓輸出,階非線性關係。大半收訊機可見其自動增益控制之電壓輸出有飽和現象,顯示各有其實際最低可測之收訊位準限制,測量校準之準確度受限於所用信號產生器之準確度±1 dB。 |
英文摘要 | Method of measurement and calibration of received signal for 11 microwave radio link receivers in business operation are presented. Results are analyzed and discussed. The relation between the receive3r signal input power level and its AGC voltage output is nonlinear in any radio link. Most of receivers showing saturation in their AGC voltage output indicate their limitation on minimum measurable signal level. The accuracy of calibration and measurement is limited to ± 1 dB by the accuracy of the signal generator used. |
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