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近几年来,由于市内电话网路不断扩大,随之而来的远郊传输测试也日趋频繁.但是由于测试仪器笨重,长途运输后又往往发生障碍或准确度受到影响;同时在测试负阻抗增音机时,测试仪器在终端,而调整的人员在中间增音站,不能直接看到电表读数,深感不便.因此有必要试制一只电路简单、成本低、耗电省、便于携带的简易晶体管传输测试器.
In recent years, due to the continuous expansion of the local telephone network, followed by the outer suburban transmission test is also becoming more frequent.But due to the cumbersome test equipment, long-distance transport and often obstacles or the accuracy of the impact; the same time in the test negative impedance increase When the phone, the test equipment in the terminal, and adjust the staff in the middle of the station, can not directly see the meter reading, deeply inconvenience.Therefore, it is necessary to trial a circuit is simple, low cost, power consumption, easy to carry simple Transistor transfer tester.