| 摘要 |
PURPOSE: An apparatus for testing characteristic of an SMD saw filter is provided which additionally includes a characteristic tester satisfying the circuit condition of an appliance employing the SMD saw filter to smoothly measure the characteristic of the SMD saw filter. CONSTITUTION: An apparatus for testing characteristic of an SMD saw filter(70) includes a measuring instrument(10) for inputting/outputting a signal for measuring the characteristic of the SMD saw filter, the first transformer(20) for transforming the signal applied from the measuring instrument to be suitable to the voltage signal of an appliance employing the SAM saw filter, and the first time constant controller(30) connected to the first transformer to control the time constant of the signal applied from the first transformer. The apparatus further has an SMD saw filter mount(40) on which the saw filter is mounted, the second time constant controller(50) connected to the SMD saw filter mount to control the time constant of the signal output through the SMD saw filter, and the second transformer(60) connected to the second time constant controller to transform the signal applied from the second time constant controller to be suitable for the measuring instrument to apply the transformed signal to the measuring instrument.
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