5 Site SurveyThe PS has a Radio Signal Test mode that monitors the state of the radio link to the CS for site survey. InRadio Signal Test mode, the frame loss and signal strength of a synchronous slot, and the signal strength ofthe other slots can be measured when the PS is monitoring the CS. After installing the CSs temporarily asplanned during site planning, set the PS to Radio Signal Test mode and locate each CS to measure its coveragearea. Then, record the results on the map of the installation site.Testing the Radio Signal StrengthAfter locating the CS(s) temporarily, execute the Radio Signal Test using the PS. Directly after entering RadioSignal Test mode, the PS scans channel 0 for a CS that it can connect to. The channel to be scanned can bechanged by pressing the appropriate keys 0 through 4.1. Enter Radio Signal Test mode.Using the KX-TD7685/KX-TD7695/KX-TD76960 to 9Log No.To store the scan dataPress 1, 9, and POWERfor more than 2 seconds.1 99Previous or Next 0 to 4Channel No.To survey other slots To survey specific channel/RADIO STRENGTH<<< MEASURING >>> RADIO STRENGTHCH0*1 SLOT:06* 2 SYNC*3L:12* 4 0005/0100* 5 * 6CS-ID:90053012340Display example:*1 Channel number*2 Slot number*3 When a slot is synchronized, "SYNC" is displayed.*4 Radio signal strength level (12 to 00)*5 Frame error (0000 to 9999)/Frame counter (0000 to 9999). Frame error indicates the number of errors out of 10 000 radio signalreceptions. An increased number of frame errors indicates greater radio signal interference and more frequent noise duringconversation. The ideal number of frame errors is "0000".*6 Error rate (%) = Frame error (0000 to 9999) / Frame counter (0000 to 9999) ´ 100Note• Storing the scan data will clear all phonebook data.• The PS will not operate in normal mode if scan data is saved on it. For details on clearing scandata, refer to "Clearing the Stored Scan Data".2. Measure the error rate and the radio signal strength by moving towards and away from the CS.Note• When the error rate is 2% or more, measure the error rate at the same location at least 5 times.You must disconnect the CS and then reconnect it to take each measurement. If the error rate isconsistently 2% or more, there may be interference from external wireless equipment. In this case,the following may happen regardless of the radio signal strength level.Error Rate DescriptionApprox. 2% May receive noiseApprox. 10% May fail to make/receive callsDocument Version 2009-12 Quick Installation Guide 215 Site Survey