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| Class B AIS not working http://navigatrix.net/viewtopic.php?f=6&t=312 |
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| Author: | philani [ 11 Aug 2012, 11:08 ] |
| Post subject: | Class B AIS not working |
Hi Using Open cpn and a modified VHF radio I now have AIS on board. I receive class A transmissions as far as 25 miles away, but receive no class B transmissions even from boats anchored next to me. As far as I can figure out the only difference between A ând B signals is the power output but I have been wrong before, and there might be a different sentence that might need decoding. Any gurus out there please help. Philani |
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| Author: | Moe [ 11 Aug 2012, 23:15 ] |
| Post subject: | Re: Class B AIS not working |
This is where the hardware people point fingers at the software people, and the software people point back. If you can't boost the signal through AIS Decoder Adjustment (Manta>Preferences>AIS Decoder Adjustment, check the Antenna, Radio, the conversion, or the connection to the soundcard....or check that the guy who says "Yeah, I've got my Class B AIS turned on" actually does and it works. If you were getting no data at all it might be something else. But with Class A getting through is sounds like an attenuated signal not making it through to the AIS modem (gnuais)....and/or not allowing enough time for the Class B to chime in.....it's what? every 10 minutes? |
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| Author: | philani [ 12 Aug 2012, 11:03 ] |
| Post subject: | Re: Class B AIS not working |
Hi Moe Checked all that and still not receiving The boat next door is transmitting, other boats with So called commercial receivers in the anchorage is seeing him. I´ll keep fiddeling and trying JB |
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