3. June 2024 © Copyright 2024, PROCEQ SA 29
5.6.5 Adjustable Time window (GP8000)
The time window is the time that the antenna’s receiver spends for listening the GPR signals
coming back from objects/reflectors in the concrete, as shown in Figure 34. Most handheld
antennas have a fixed time window which does not allow for receiving deeper signals (provided
an adequate range of low frequencies) or focusing on shallow layers.
Figure 34: Time window principle
GP app software (only with GP8000) provides in the image processing dropdown menu: the
“depth/time window” setting. By adjusting the time window from 10 ns (shallow) to 24 ns
(deep), the user can either focus on shallow objects or extend the depth to the maximum
(150cm / 60in penetration depth for standard concrete).
Figure 35: GP app software image processing adjustable time window
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