Sensors & Software Inc. NG500 ユーザーズマニュアル

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11-Locate & Mark Mode
Noggin
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11.4.4 Gain
Since GPR signals are absorbed by the material being scanned, deeper targets have weaker
signals.  Gain acts like an audio volume control, amplifying the signals and making deeper
targets appear stronger in the image.  The Gain varies from 1 to 9 with 1 being no gain and 9
being the maximum gain.  
As the Gain changes, the current image on the display updates so it is not necessary to re-collect
an image with a different gain setting.  Use the lowest gain setting that shows the targets.  Try to
avoid over-gaining as understanding the image may become more difficult.