First, click on “SBAS“ (Satellite Based Augmentation System). Then the SBAS settings item
opens on the right. Click on the first free field before item 1 and 2. Then, click on item 3
“Sending”. The changed data will then be transmitted to the receiver. Close the window. You will
be asked if you want to save this setting. Click on YES.
EGNOS is still in operation mode. The long-planned switch-over to regular operation was
repeatedly postponed. This is the reason why the use of the EGNOS correction in the NL-
604P is deactivated in the default setup. That is not to say that by using these correction
values the location determination will become better. The users must decide for
themselves if they want to use this function or not.
8. Assist GPS configuration with u-Center 6.xx
The NL-604P supports AssistNow!
AssistNow is a standard A-GPS service, which increases the performance of the GPS
receiver, by calculating a position almost immediately, even under difficult reception conditions.
A-GPS improves all GPS capable applications, especially those that require a continuous state of
readiness, for example applications for fleet management or GPS capable hand-held devices,
whose users would like to access local services immediately, independently of the reception
conditions.
Without A-GPS, a GPS receiver must localize at least 4 satellites in the direct line of vision, and
then download their location data. This process takes 30 seconds under optimal reception
conditions, but under less favorable conditions it may take much longer, e.g. in an urban
environment or in a building, where the GPS reception is weaker. AssistNow sends the data
directly to the GPS receiver, thus enabling a quick calculation of the position. AssistNow sends
the data directly to the GPS receiver, thus enabling a quick calculation of the position.
The offline service provides support data, which are valid up to 14 days. The user can thus profit
for longer periods from the increased satellite acquisition performance, and they need an
internet connection only occasionally, in order to update the support data.
The call-up and data transmission functions can be found in the menu bar of the u-Center.
Click on the AGPS function in the menu bar to update AssistNow and to load the NL-604P.
A small window with a small pull-down menu appears, in which you can see the validity of the
data. Choose the desired validity period. Click on “Flash update”, and then on OK. The UPDATE
window opens and shows that the u-Center has loaded the data and is transmitting them to the
NL-604P. When this process is finished, the window turns green, and the messages “SEND
CANCEL” and “DONE” are displayed. This finishes the process.
