| 摘要 |
PURPOSE:To perform both a demagnetization test and a package test with just a single device and to improve the operability of this tester device, by unifying a demagnetization tester and a package tester with common use secured for same components and at the same time having a loadable/unloadable structure for both a demagnetization program electric power supply and a demagnetization coil. CONSTITUTION:Both a demagnetization program power supply 34 and a demagnetization coil 35 can be loaded and unloaded and then loaded only for a demagnetization test. In the case of this demagnetization test, a demagnetization control part 31 is started and transfers the contents of a demagnetization test data part 32 to a program power supply part 16 to decide the current value of a bubble driver 18. In a package test mode a package test control part 13 transfers the contents of a package test data part 15 to the part 16 to decide the current value of the driver 18. Both exclusive data parts 15 and 32 are required for both demagnetization test and package test since the sequences are different from each other for measurement of characteristics. A read/write data part 14 and a data pattern generator 20 can be used in common with both tests. |
