User manual RAYMARINE RAYTECH 4.1

[. . . ] Distributed by Any reference to Raytheon or RTN in this manual should be interpreted as Raymarine. The names Raytheon and RTN are owned by the Raytheon Company. USER'S GUIDE Documentt No. . 81207_1 Documen No 81207_1 Febrruarry 2002 Feb ua y 2002 RayTech Navigator 4. 0 Raymariine, , Inc. . Lauderda e Eng n eer n g D v s o n Ft Lauderda e Eng neer ng D v s on h 1800 NW 49ttth St. . [. . . ] Radar Rain Clutter Display When the FTC control is turned up, only the leading edge of large (rain clutter) echoes is displayed, while the effect on smaller (ship) echoes is only slight. This means that you can also use the control on shorter ranges to distinguish between two very close echoes on the same bearing, which may otherwise merge and appear as one echo. When the FTC control is turned up, the receiver is less sensitive, and there is a reduction of background noise and fill-in returns from land and large targets. You should therefore turn the control down when its use is not required. Since storm cells are usually visible for long distances due to their extreme altitude, you may wish to leave them displayed so that you can observe the location of bad weather. 5-16 Advanced Navigator Functions If you turn the RAIN or FTC control Off (equivalent to setting the level to 0%), the actual setting is stored, and restored when you turn the control on again. Use the up/down arrows to increase/decrease the RAIN and FTC settings. 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. 3. 4. 5. 5-17 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. 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. The optimum Tune setting varies slightly for different ranges, depending on the pulse width used. 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. 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. 2. 4. 5. 5-18 Advanced Navigator Functions Changing the Target Display The Pathfinder PLUS Radar allows you to improve target visibility by changing the following: · Interference rejection (In Rej) · Target expansion (Expansion) · Target wakes (Wakes) These controls are accessed from the Functionbar Targets Button. Click Clear Wakes to remove wakes from the screen. You can use the buttons to change the settings of any or all the modes. The top screen status bar updates to indicate which controls are on. 5-19 RayTech Navigator User's Guide Interference Rejection Mutual radar interference is likely when two or more radar-equipped vessels are operating within range of each other. This usually appears as a series of small dots moving to and from the display center in a straight line or a long, sweeping curve (Figure 5-7). This type of interference is most noticeable at long ranges. Figure 5-7. Radar Interference Rejection Display The Pathfinder PLUS Radar includes a mechanism that automatically reduces such interference. [. . . ] Position reporting works in conjunction with RayTech's automated weather services. Raymarine Interim Sheet 7 To set up your position report: 1. Click the Advanced button of the E-Mail Request tab to set up position reporting and advanced weather services. In the Send To field, enter the address to which you would like the position report sent. If there is more than one address you want to send to, enter all of them, separated by commas. [. . . ]