Delta X 100/12 User Manual
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Contents
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Delta X. User Manual38DetectionUpdate MasksIt would be too difficult to find a surveillance transmitter among the huge number of broadcasting andcommunication signals which exist in any modern environment if those signals were not filtered out.The great advantage of the Delta X is its ability to mask any safe background signals.How the masking worksA signal becomes dangerous and produces an alarm when it exceeds the threshold. The threshold forthe masked signal lays higher than the signal and therefore is not exceeded. As a result the maskedsignals do not produce danger events.Below is the example of the FM band with non-masked and masked signals:In the Update Masks mode the Delta X can be adapted to the current radio-frequency environmentbefore any detection. This procedure significantly reduces false alarms and increases the generaldetection sensitivity since it stores spectrums of all safe signals existing in the area and uses them forgenerating the threshold further during a detection. Both the known and unknown signals are masked.Perform the Update Masks procedure each time you are going to use the Delta X in a new location.Antenna connection: connect the omnidirectional antenna ODA-4 directly to the INPUT socket.Start the Delta X system and run the Update Masks mode before entering the target zone. This can bedone in a car, outdoors or in another building. Higher floors are recommended since they provide betterreception of broadcasting signals. Place the system or antenna near a window if possible. Move theantenna in different directions and angles in order to accumulate the highest levels.The computer running the Delta X, like other sophisticated electronic devices, may produce RadiatedSpurious Emissions (RSE). These emissions can be picked up by the system and create false alarmsduring a search. To mask the RSEs; mount the antenna on the upper part of the case or hold it 10-30 cmaway from the computer for 1-2 minutes when the Update Masks procedure is being performed.Masked signal. Does notproduce alarmsNon-masked signal.Exceeds threshold andproduces alarmsThreshold |
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