If you want to review the data you just collected or access any of the Playback functions, push the Down
arrow to highlight the particular menu choice.
If you would like to review a previously collected file, pushing the Playback function key will bring up a
window that lists stored data files.
If you select a single file, it will cycle through that one, or you can choose multiple files and the system
will play them back in sequence.
The playback menu has two sub-menus:
SCAN (page 19)
PROCESS (page 19)
The scan sub-menu contains two parameters: DIEL, and SURFACE.
Surface operates just like the surface item in the Position sub-menu of Collect menu, and it
has been duplicated here for convenience. Once again, this input is percentage based. Changing the
surface position here will not permanently eliminate any data.
The Diel parameter allows you to input the dielectric constant so that the system can do a time to
depth calculation. Once again, for convenience, this parameter is duplicated from the Scan sub-menu of
the Collect menu. Possible values are 1-81.
This menu allows you to apply different filters and mathematical operations to the data in order to remove
noise or make subtle features more visible. These functions do not permanently alter the data, but are only
for display purposes.
Stacking in Playback Mode differs from the Stacking function in Collect Mode. The
Playback Stacking is also a horizontal, high-frequency noise reduction technique, but here it is an FIR
filter with a boxcar shape.
The Background Removal filter is a horizontal high pass (removes low frequency
noise) operation meant to remove flat-lying noise associated with antenna ringing.
