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Old 10-08-2017, 05:42   #16
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Re: Icom MA-500TR Class B AIS - Anyone Used it Yet ?

Hi,

I am currently in the process of installing my MA-500tr and got a bit concerned regarding your comments that only port2 works to transfer ais to opencpn.

I have connected port3 to my opencpn (awaiting a cabel so have not had chance to test it yet. When you say that only port 2 works, did you try port3 or was it only port1 (which manual expressly says only dcs function) you tried first?

First post in this forum. Yeeeyh
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Old 10-08-2017, 09:37   #17
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Re: Icom MA-500TR Class B AIS - Anyone Used it Yet ?

Port 2 works.
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Old 22-09-2017, 00:08   #18
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Re: Icom MA-500TR Class B AIS - Anyone Used it Yet ?

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Originally Posted by aluijten View Post
I've just returned my MA-500TR to the importer. Not because there is something wrong with it, it works fine. The thing that kept bugging me was that there was no Silent Mode available.

In my last struggle with some Icom sales rep. on some boat show, this guy told me that you can have the software "updated" in such way that you do have a silent mode available. This "update" can only be done at the importer.

So I'm curious to see how this is going to work after I get it back.

Arno


I gather that there is a key combination that does allow the MA-500TR to be put into silent mode. Does anyone know what this key combination is?
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Old 22-09-2017, 10:41   #19
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Re: Icom MA-500TR Class B AIS - Anyone Used it Yet ?

See post #14.
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Old 22-09-2017, 11:17   #20
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Re: Icom MA-500TR Class B AIS - Anyone Used it Yet ?

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See post #14.


Thanks Don thatís good to know. Not quite so enjoyable reading about the other issues you identified!

My set up has the MA-500TR hooked up to a M506 vhf which has a command mic in the cockpit. It also feeds my old E80 at the helm.

I havenít spotted the lack of cpa issue (yet). On a positive note, I can make a DSC call direct to a vessel by scrolling down to its name on the command mic screen. Theoretically this is good but there still seems to be a lack of ability here so DSC calls are mainly unanswered and itís necessary to use ch16.

Thanks again for the silent mode info.
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Old 17-12-2017, 14:29   #21
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Re: Icom MA-500TR Class B AIS - Anyone Used it Yet ?

I have installed my MA-500tr and get an antenna short error, however I am still able to receive information from other vessels. I do know that my info is not transmitting. No sure where the fault is.
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Old 20-12-2017, 10:53   #22
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Re: Icom MA-500TR Class B AIS - Anyone Used it Yet ?

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Originally Posted by ScubaNinjaB View Post
I have installed my MA-500tr and get an antenna short error, however I am still able to receive information from other vessels. I do know that my info is not transmitting. No sure where the fault is.
I recommend you measure the VSWR for the antenna you are using at the AIS frequencies, channels 87B (161.975-MHz) and 88B (162.025-MHz). Note that you probably will be unable to accomplish this using your standard VHF Marine Band radio as a signal source; most ship radios do not transmit on those frequencies.

Trying to transmit at channels 87B (161.975-MHz) and 88B (162.025-MHz) into a standard VHF Marine Band antenna generally results in a high VSWR on the transmission line. Your AIS unit may be detecting the high VSWR as an antenna fault, and to protect its transmitter, refuses to transmit into that load.

AIS transmitters generally have to be used with specially-tuned antennas that are adjusted for the AIS channels, or used with special wide-VSWR-bandwidth antennas that maintain a reasonably good VSWR at the AIS transmitter frequencies.
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Old 20-12-2017, 12:14   #23
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Re: Icom MA-500TR Class B AIS - Anyone Used it Yet ?

Quote:
Originally Posted by ScubaNinjaB View Post
I have installed my MA-500tr and get an antenna short error, however I am still able to receive information from other vessels. I do know that my info is not transmitting. No sure where the fault is.
Or, as in my case, there may be an actual short at the connector on the antenna cable. On a new powerboat I was receiving AIS but the range was very short, and could make VHF contacts, but again only over a short distance. I measured the VSWR and it was really bad. The connector (installed by the boat manufacturer) had a soldered center connector and a clamped shield, so I unsoldered it, trimmed the errant shield wire, and resoldered. Result: decent VSWR and great range. This was using a Garmin AIS-600 transponder with built-in splitter, and what looks like a medium-length VHF whip (probably tuned for channel 16).
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