White Paper: Shielding Requirements In (W)CDMA-Based Testing

Once performed over a cable, measurements on mobile phones and wireless data devices today are conducted over the antenna. But measurements over the antenna imply that the radio signal is sent over the air where there are lots of other signals that intermix with those between the unit under test and the instrument. This paper details both how unwanted signals may affect measurements and how the test setup may affect other equipment in the vicinity, if no or insufficient shielding is applied.