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post #11 of 22 Old 08-20-2015
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Re: AIS-B Installation and range

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Originally Posted by gbgreen59 View Post
Are you saying that there is a particular brand of splitter that was manufactured poorly? Splitters have been around since the beginning of RF. Dual splitter w/o amp included is 3 dB loss. Been that way since splitters have been around. Can you be more specific on this?
A couple of years ago when I was looking at sharing an AIS/VHF connection the concensious was to not do that, as a lot of users reported problems. That seems to be a lot less of the case nowadays

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post #12 of 22 Old 08-20-2015
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Installing a second antenna is cheaper than a quality splitter and gives you a backup antenna.
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post #13 of 22 Old 08-20-2015
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Re: AIS-B Installation and range

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Number of targets is not an issue in my case but thanks for the suggestion. Refresh also seems a little slow. I've read that NMEA 0183 should be transmitting in high speed mode but I have yet to figure out if that is programmable or even an issue.
The NAIS-300 support both NMEA 2000 and NMEA 0183 HS (which is 8.4K-baud, much faster than the old NMEA 0183)

Maybe you should check what your install is using.
If it's using the NMEA 0183 HS you should confirm that your plotter is configured correct.
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post #14 of 22 Old 08-20-2015
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Re: AIS-B Installation and range

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Originally Posted by gbgreen59 View Post
Are you saying that there is a particular brand of splitter that was manufactured poorly? Splitters have been around since the beginning of RF. Dual splitter w/o amp included is 3 dB loss. Been that way since splitters have been around. Can you be more specific on this?
Since this is an installation with two transmitters (VHF and AIS) the splitter needs to be an active splitter to prevent one of the receivers being "fried".

i have seen several claims that some of these active splitters are unreliable (don't know which ones are bad or good)

Last edited by knuterikt; 08-20-2015 at 06:19 PM.
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post #15 of 22 Old 08-20-2015
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Re: AIS-B Installation and range

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Installing a second antenna is cheaper than a quality splitter and gives you a backup antenna.
If you install a new antenna, I suggest you install one tuned for the AIS frequencies. It can still be used in a pinch for generic VHF but will give better performance for its primary purpose. AIS-B is a puny signal (2 Watts) and needs all the help it can get...
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post #16 of 22 Old 08-20-2015
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Re: AIS-B Installation and range

[QUOTE=knuterikt;2978209]Since this is an installation with two transmitters (VHF and AIS) the splitter needs to be an active splitter to prevent one of the receivers being "fried".
QUOTE]

Makes sense, thanks.
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post #17 of 22 Old 08-20-2015
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Re: AIS-B Installation and range

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Installing a second antenna is cheaper than a quality splitter and gives you a backup antenna.
Really.. After the cost of a quality antenna and running the wire (even yourself) I think the cost is pretty close even with a high quality splitter (Vesper is $229). If you have to pay for labour, then the splitter would be WAY CHEAPER.

The Vesper splitter is top quality and it has performed flawlessly for me. I have also never heard a complaint from other cruisers using it all over the world.
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post #18 of 22 Old 08-20-2015
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Quote:
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Quote:
Originally Posted by RainDog View Post
Installing a second antenna is cheaper than a quality splitter and gives you a backup antenna.
Really.. After the cost of a quality antenna and running the wire (even yourself) I think the cost is pretty close even with a high quality splitter (Vesper is $229). If you have to pay for labour, then the splitter would be WAY CHEAPER.

The Vesper splitter is top quality and it has performed flawlessly for me. I have also never heard a complaint from other cruisers using it all over the world.
I guess it would never occur to me to pay someone, but I am sure you are right in that case.

I bought a quality antenna, the cable was attached. Everything combined was about $100 and the install took me less than an hour.

I have no doubt the Vesper splitter is quality kit, just listing another option.

Last edited by RainDog; 08-20-2015 at 08:28 PM.
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post #19 of 22 Old 08-20-2015
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Re: AIS-B Installation and range

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I guess it would never occur to me to pay someone, but I am sure you are right in that case.

I bought a quality antenna, the cable was attached. Everything combined was about $100 and the install took me less than an hour.

I have no doubt the Vesper splitter is quality kit, just listing another option.
I'm pretty particular about the cable I used on my boat. I just pulled out all the cable and replaced with LMR400. That cable was $100 alone.

Of course that was just me!
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post #20 of 22 Old 08-22-2015 Thread Starter
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I've found my problem. Duhhh. The Factory and or Dealer never installed the splitter. The AIS cable connector is not terminated to anything.
Frustrating. I probably should have noticed this sooner but I've not really needed it. Now that I have started taking notice it definitely didn't seem right.
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