ACR Electronics NAUTICAST inland AIS Installation Manual page 36

GPS module:
The screen provides means to switch the GPS Module between the „<µBlox>‟ or „<Jupiter>‟.
You can force the AIS to search again for the GPS Module installed. Selecting the wrong type
of GPS module may result in invalid position information and/or malfunction so that your AIS
can not operate correct. Select and with [Left] & [Right] arrows the option <SEARCH>to
search which module is installed Please mention the system will restart automatically when
saving these setting later. .
Position Pinning:
The screen provides means to switch the position pinning function of the internal GPS
receiver on and off. For vessels operating with SOG < 0,3 knots it is recommended to switch
position pinning off. Otherwise the internal GPS receiver may deliver wrong position
information.
The data input field is fitted with the recommended default value (<on>). M5 button is used for
saving the settings.
NOTE: The system will be restarted after saving the settings.
<µBlox> GPS Receiver:
This GPS receiver is installed in later versions of NAUTICAST™. It is designed for use with
passive and active antennas. The recommended GPS antenna should have a minimum gain
of 15 - 20 dB to compensate signal loss in RF cable. The supplied ACR – GPS antenna is a
active type and has a gain of +30dB it is able to drive cable lengths of 45 meters. Antennas
with more than 50 dB should not be used. This high signal level can damage the GPS
receiver.
<Jupiter> GPS receiver:
As described above, the resulting installation gain should be between 0 to 10 dB. If the
internal GPS receiver will be overloaded with more than 18dB, then it could be damaged.
Attenuation values
Type
GPS-Antenna
GPS-Antenna
Comb. GPS/VHF-Antenna
Cable
Adapter
Connector
Example
Procom GPS4
11m RG214 0,35 dB/m
maybe 2 TNC plugs
Nauticast with Adapter P/N 2610
Total
Necessary minimum attenuation for Jupiter (=> 12dB Attenuator needed!)
GPS Input
Antenna Layout
32
Name
GPS-Antenna Marina 2
Procom GPS4
Comrod AC-17
RG214
GPS-VHF Adapter cable with
1m RG58 / TNC connector
TNC plug RG214 crimp
Part number Total gain
2625 +35dBi
2622 +35dBi
2624 +20dBi (GPS amp gain)
2630 -15,75 dB
2612 -1dB
2633 -0,1dB
+ 35,00dBi
- 3,85dB
- 0,20dB
-1,00dB
29,95dB
≥11,95dB
≤18,00dB
Y1-03-0212H