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Keypad & Display Description | 17

4 Keypad & Display Description

The MX510 and MX512 keypad operation and traffic light indications are identical. The Traffic

Lights on the right side of the display will tell you how your navigator is operating.

You need to take care in reading the trafc light indications, as there are overlapping

possibilities between the GPS and DGPS modes. If you are unsure of the current

operating mode, select the CFG function key and scroll down to the DGPS selection. If

the DGPS mode is selected to anything other than Off, then follow the Differential GPS

Trafc Light Operation. If the DGPS mode is selected to Off, then follow the GPS Trafc

Light Operation.

Differential GPS Trafc Light Operation:

Red Flashing

Not tracking satellites (no position update). This is normal for the first 2 minutes or

so when turning the unit on. The very first time you turn the unit on, or if the memory

is reset or lost, this condition is also normal. Allow the receiver to run for at least 20

minutes under these circumstances. If it still does not change to Red Solid, refer to the

troubleshooting section in the page 110 of this manual. An icon similar to the one at left

will be displayed in the upper left corner of screen.

Red/Yellow Solid

Dead Reckoning . When normal GPS or DGPS operation is not available, this LED sequence

is provided to quickly identify the DR navigation mode. A DR indicator is also displayed on

all screens.

Red Solid

Tracking one or more satellites (no position update). This is also normal for the first 2

minutes or so when turning the unit on. The very first time you turn the unit on, allow

the receiver to run for at least 20 minutes after changing to Red Solid to collect an

almanac from the satellites, regardless of whether a position fix has been calculated

or not. This is also a normal indication if the HDOP is greater than 10, if the receiver

is tracking too few satellites, or for other reasons as well. Read the GPS and DGPS

function screens for more information.

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Memorex RX 1 Smart Installationshandbuch Seite 19