Memorex RX 1 Smart Installationshandbuch PDF herunterladen (Seite 70)

68 | Keypad & Display Description

The GPS5 screen shows the position Lat/Long, height of antenna, HDOP, number of

satellites used, the satellite ID number that may cause the statistical error and its bias

value. It also shows a table containing the PRN numbers of satellites in use, their

residual errors and elevations. Below it is the RAIM Status indicator and time. The RAIM

icon is shown on the top-right corner of the display.

Position errors may be caused by unhealthy satellites, incorrect pseudoranges, poor

DGPS corrections and excessive atmospheric interference. When the RAIM caution or

RAIM unsafe alarm is on, the GPS/DGPS accuracy may be degraded but still usable when

navigating in open waters.

When the RAIM option is enabled an icon is posted on the top right corner of all screens.

- means RAIM safe condition

- means RAIM Unsafe condition, position errors exceeded the range limit specified

under the CFG/GPS/Accuracy Rng.

- RAIM Caution. Not enough satellites are available for proper RAIM calculation.

The GPS5 RAIM screen works interactively with the GPS/RAIM menu under the CFG key.

Use the procedure below to activate the RAIM feature;

Press the 1 CFG key.

Scroll down to the

2 GPS menu.

Press the

3 EDIT key to bring up the cursor.

Scroll down to “RAIM: .....No”

Highlight the 5 Change softkey and press ENT to switch it to “Yes”.

Scroll down to “Accuracy Rng 10-100m: 100” to change the range. Otherwise you

may skip this step. 100 meters is the default value.

The GPS5 RAIM Status screen is available in MX51x models with program version 3.0 and using the

MX521 or MX525 antenna sensors.

The MX51x and RAIM feature is an aid to navigation ONLY. Under no

circumstances should it be used in lieu of authorized government charts. Its accuracy

can be affected by many factors such as equipment defects, environmental conditions,

or improper operation. The user is responsible for safe navigation of the vessel. This

includes consulting authorized government charts and exercising common prudence and

navigational judgement at all times.

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Memorex RX 1 Smart Installationshandbuch Seite 70