1. IntroductionThis booklet describes the features and operation of the NPL-1EGSM900, DCS1800 and PCS1900 cellular terminal with Field TestDisplay software. Field Test Display (i.e. Engineering Test Display orNetwork Monitoring Display) is a software feature available throughthe user interface of the NPL-1 cellular terminal.Field Test Display is available only on terminals equipped withspecial test software; it is not available on standard terminals.A phone with Field Test software is intended for verification of theoperation of the EGSM900, DCS1800 and PCS1900 networks. It maybehave differently from the normal phone in some instances, forexample:• The caller's phone number is not displayed• In some cases the user interface behaves differently from thatdescribed in the user manual of the phone• The performance of the phone can sometimes be lower thanthat of a standard NPL-1 terminalA phone with the Field Test Display is not a calibrated measurementdevice, so it must be borne in mind that:• Measured values seen in the Field Test Display areapproximate (e.g. RSSI levels in field test displays 01, 03, 04and 05 in group 01)• Because the Field Test Display is not always updated in realtime, the displayed values may actually have changed beforethey are shown to have done so on the display.The field test display may change when new SW is updated on thephone. The fields described in this document may have differentvalues, and there may be some displays removed/added in the newSW versions. Nokia reserves the right to make changes to thefeatures and operation of the Field Test Software.2