water is constantly being churned up by tidal currents, prop-wash from other boats, etc., causing extremely dense
subsurface interference. In this case a slightly increased amount of D.R.R. would be required. Remove power from the
unit and disconnect the transducer.
The D.R.R. LEVEL CONTROL is located on the main digital Printed Circuit Board and is accessible by removing the back
plate.(See sketch)
CAUTION: The DRR LEVEL CONTROL is mounted close to the rear of the case. The other larger control sets the
units depth calibration accuracy, , , , , do not adjust this control!
Before making any adjustments of the D.R.R. LEVEL CONTROL make note of its factory preset position so that you can
easily return to the factory setting. It is then best to make adjustments (either increasing or decreasing DRR LEVEL as
required) in small increments and then checking results for optimum performance in your particular area. This trial and
error approach will assure that OVERCOMPENSATION does not take place. It should be noted that it is virtually
impossible to arrive at one DRR Level setting that is perfect for ALL conditions. This is due to the nearly infinite
combinations of variables that affect depth finder performance.. However, the DRR system in your Aqua Probe is the
most sophisticated of its type on the market today, and will provide superior performance compared to other methods of
subsurface interference rejection.
