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                                                                                                                                                                                                              文章詳情

                                                                                                                                                                                                              Agilent安捷倫E5071阻抗衰減測試全過程

                                                                                                                                                                                                              日期:2022-06-14 18:45
                                                                                                                                                                                                              瀏覽次數:52
                                                                                                                                                                                                              摘要:既然通過自檢初步判定是以上幾個故障,現在首要的驗證下功率偏低多少?


                                                                                                                                                                                                              2022.4.21日,深圳某客戶送來一臺E5071B,頻率范圍300KHz-8.5GHz,其反饋在測試網線過程中,阻抗和衰減測試均正常,但串擾一直NG,這種情況主因就是某功率放大版故障導致。

                                                                                                                                                                                                              果不其然,從客戶發過來的主界面中可得知一二,Power on test faild(A3 DC-BUS),

                                                                                                                                                                                                              到手后,立刻做了設備自檢,自檢結果如下圖:

                                                                                                                                                                                                              1,A2 Master DC

                                                                                                                                                                                                              2,A3 DC

                                                                                                                                                                                                              3,rich power gain

                                                                                                                                                                                                              4,Step attenuator

                                                                                                                                                                                                              以上四項全部FAIL.

                                                                                                                                                                                                              1,A2和A3源板故障

                                                                                                                                                                                                              2,大功率增益和步進衰減器故障

                                                                                                                                                                                                              既然通過自檢初步判定是以上幾個故障,現在首要的驗證下功率偏低多少?

                                                                                                                                                                                                              經驗證,確實功率偏低了5個dbm左右。

                                                                                                                                                                                                              通過維修,我們再看下修復后的值以及其他:

                                                                                                                                                                                                              可以看到功率基本恢復到原廠值。

                                                                                                                                                                                                              我們從以上圖像中,可以看到網分得到了徹底的恢復。

                                                                                                                                                                                                              首先,修復已知所有故障;其次,校準了精度。
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