A GMR HGA was mounted on Guzik tester as shown in Fig. 12. The GMR HGA was exposed to emission to all three mo bile phones and to both sources of non- contact ESD events both before and during the test. The GMR head was undamaged. However, when exposed to emission TDMA phone at a distance of400 (10 cm) from the test fixture, Guzik tester reported the error ‘‘Signal unstable during main gain adjustment’’. Apparently, the TDMA phone induced sufficiently high signals into the test circuit to influence the measured signal to the degree that the tester recognized it as an error. Since neither AMPS nor CDMA phone was ableto produce the same effect, it is our assumption that the pulsed nature of TDMA
đang được dịch, vui lòng đợi..