Gain; Frequensee - Radiodetection RD1500 Operation Manual

Line Scan
Figure 8-10: Left image shows Filter On, while the right shows the same data with the Filter
Off.

Gain

Since the material being scanned absorbs the GPR signal, deeper targets return weaker
signals. Gain acts like an audio volume control, amplifying signals and making deeper targets
appear stronger in the image. Gain values vary from 1 to 9 where 1 means a minimal
amplification has been applied and 9 means that maximum amplification has been applied.
Pressing this button increments the gain; once you reach 9 it cycles back to 1.
Avoid over-gaining the data as it can make interpretation difficult. In general, soils that are more
electrically conductive (eg. clays) will require a higher gain compared to soils that are less
electrically conductive (eg. sand).
Figure 8-11: Varying the Gain

FrequenSee™

FrequenSee™ is a feature that can selectively enhance small, medium or large size targets for
easier viewing and detection. Pressing FrequenSee (or DynaT in some older models) cycles
between the options: All, Small, Medium and Large. Each option allows the user to enhance
part of the ultra-wide band (UWB) spectrum to focus on those desired features.
© Radiodetection 2016 45 RD1500 Operation Manual