RayTech Navigator User’s Guide

Tuning the Receiver

The TUNE control is used to fine-tune the receiver in the scanner for maximum target returns on the display. In Auto mode, the radar tunes itself automatically on all range scales. Raymarine recommends

that you leave the TUNE control in Auto mode.

If you set the TUNE control to Manual, you will need to adjust it about 10 minutes after you have turned on the radar, since the required setting changes after the magnetron has warmed up.

Adjust the control to obtain the maximum signal strength, as indicated in the 8-step signal strength bar above the slider.

To tune the radar:

1.Select a range appropriate to the adjustment you want to make. The optimum Tune setting varies slightly for different ranges, depending on the pulse width used.

2.On the Pathfinder Panel, click the MULTI button.

3.Press the TUNE button. The button toggles the control between Auto and Manual mode.

4.Select Manual mode to display the arrow control buttons and signal-strength meter. Use the up/down arrows to increase/decrease the Manual TUNE adjustment to obtain the maximum reading on the meter. Important: Because the changes to the settings are made immediately, you cannot revert to the previous setting by clicking CLEAR.

5.When you have set the controls to the levels you require, click ENTER, CLEAR, or BACK to return to the default menu level of the Functionbar.

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Raymarine Marine GPS System manual Tuning the Receiver, That you leave the Tune control in Auto mode, To tune the radar