Installation manual

120 | Simrad MX500
GPS - Elevation Mask Control
This screen controls the elevation mask angle, or the an-
gle above the horizon, at which the receiver will attempt
to track a satellite. Satellites with an elevation below this
angle will be tracked but will not be included in the posi-
tion solution. You can set the elevation limit to any value
up to 90°. For most marine applications, the default limit
of 5° is appropriate.
The Antenna Offset allows you to virtually offset your
antenna location. That is, if you are forced to place the
antenna in a location other than where you want your po-
sition fix calculated (due to superstructure or other high
power antennas), you can place the antenna in a practi-
cal location. Then enter the appropriate Antenna Offset,
and the receiver will calculate your position in the place
where you would have preferred to place the antenna.
The RAIM menu is normally set to YES. RAIM stands for
Receiver Autonomous Integrity Monitoring. For more
information about RAIM, see page 105.
Init Pos - Initial Position Entry
This screen is provided to help the GPS receiver in the
MX antenna to get a faster first position fix. While the
smart antenna is capable of computing its position with-
out any user input, this feature can cause a position fix
to occur several minutes earlier. Another time this fea-
ture is useful is when the receiver has been moved over
300 miles from the last location it was used while in the
off condition.
Again, the receiver will calculate a position fix without
any user input in this circumstance. However, moving the
receiver to a new location and not inputting a new initial
position will cause the receiver to select a satellite con-