ACR Electronics 2662 - Manual (Page 36)

GPS module:
The screen provides means to switch the GPS Module between the „<µBlox>‟ or „‟.
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
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 (). 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.
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 Name Part number Total gain
GPS-Antenna GPS-Antenna Marina 2 2625 +35dBi
GPS-Antenna Procom GPS4 2622 +35dBi
Comb. GPS/VHF-Antenna Comrod AC-17 2624 +20dBi (GPS amp gain)
Cable RG214 2630 -15,75 dB
Adapter GPS-VHF Adapter cable with
1m RG58 / TNC connector 2612 -1dB
Connector TNC plug RG214 crimp 2633 -0,1dB
Example
Procom GPS4 + 35,00dBi
11m RG214 0,35 dB/m - 3,85dB
maybe 2 TNC plugs - 0,20dB
Nauticast with Adapter P/N 2610 -1,00dB
Total 29,95dB
Necessary minimum attenuation for Jupiter (=> 12dB Attenuator needed!) ≥11,95dB
GPS Input ≤18,00dB
Antenna Layout
32 Y1-03-0212H