Delta X. User Manual41 The country of use must be specified, the Bands table must be set up The Update Masks procedure performed The Known Signals should be filled during the Update Masks or manually All nearby mobile phones must be switched off or put in "flight (plane)" mode. All knownwireless devices like access points, video cameras, baby monitors, printers etc. must beswitched off. Wireless phones must be switched off. If the option "Scan 802.11 wireless access points" is inactive, the computer running the Delta Xshould be in the "flight (plane)" mode Sound in the checked room should be created to activate any potential bugging devices andforce them to increase their transmission power. The laptop with the Delta X can producemusic, or a language tuition course for example to achieve this.Antenna connection: connect the omnidirectional antenna ODA-4 directly to the INPUT socket.Initial parametersAfter selecting the RF Sweep mode the operator is asked to set the initial parameters.The "Antenna connection" reminds you of the correct connection of antenna.The "Date and time of the last masks' update" warns if the masks are out-of-date or absent."Log" selects to what log (database) the data will be written. Press the selection button if necessary. Thelog selection window will pop-up. Please see the "Stop / View Log" section on page 63 for details.The unchecked by default additional parameters contain some extra controls:"Frequency range" helps to specify the swept frequency range. It is recommended to use the defaultvalues, although a narrower span might be specified when it is necessary to watch and log somesuspicious signals in a specific range. The default values are set each time the Delta X software is started.