Raymarine GPS navigation User Manual download pdf (Page 53)

Selection of Secondaries

When

pS1,S2?(

softkey is pressed, the screen will change to the

”

S 1,

$2 Selection” screen. On this page the top line of large characters shows the

received secondary stations from the selected GRI.

To enter the two secondary stations for S 1 and $2 that you would prefer to

use for your Lat/Lon calculations, Press

thasoftkey

for a NEW S 1 station

and using the numeric keys, type the number of the desired station. Then

pres$%%@

The softkey arrows will return. At this point you may coose

a new $2 or

press/ZiKQone

more time to return to the Signal Status page.

For S2, press

themsoftkey

and using the numeric keys, type the number

of the desired station for S2. Then

presdm1.

Example:

(-1

for S 1 of 2

/BJ 4,

@EEQ

for S2 of 4

Press

when finished to return to the

. Signal Status page.

3.10.2.4 GPS Signal Status

When in the GPS mode and

theI-

key is

pressed and

ISIGNAL

STATUS{

is’ selected from

the Menu Directory, the GPS Status screen will

appear and show the GPS satellite signals.

I .

,y.

:j@&

0141MT

SF*

PRESS CLEARTO EXIT I

The “Satellites Tracked” display shows the identification numbers( ID) of

the satellites being received, tracked, and used for L/L calculations in the

reverse block characters. The

Raystar

108 sensor is usually tracking 4-6

satellites at any one time and can track up to eight, if visible. So, seeing 6 to

8 blocks illuminated is not at all unusual.

In the column below each Sat ID # you can see see the individual satellite’s

azimuth angle, it’s elevation angle from the horizon, and signal level (SNR).

The data is displayed for all satellites being received.

Below the Status box the HDOP number appears and provides the current

fix quality. This rates both the strength of the satellite signals as well as the

geometry of the satellite positions. Typical HDOP numbers for a good fix

are 2 or less. Fair HDOP values are 4 or less; Poor HDOPs are over 5.

OPERATION 3-40

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Raymarine GPS navigation User Manual Page 53

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