Question about KVH 01 0277 01sl Tracvision A7 Mobile Satellite Tv Antenna System

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KVH M7 track vision problem.Not tracking

Hello I have a KVH M7 track vision satellite. When I switch it on the antenna starts searching for the satellites but can not find the first one. I used the antenna in north Greece with Eutelsat W2 and Astra 1 satellites.There is a full coverage here by both of them.When I was in Italy and France everything worked perfectly.
If somebody can give me some clue will be great.
Thanks a lot

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As you move east and west on the Mediterranean, you must adjust the LNB, rotate it, see book.

Posted on Jan 27, 2010

  • Evgeny Chereshnev
    Evgeny Chereshnev Oct 14, 2013

    Sorry, but you say nonsense. A7 can recieve only circular polarisation. It wouldn't work wit linear polarisation from eutelsat w2 and astra. A7 can work in north america with directv or in russia with NTV+ and Tricolor


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Please use to calculate skew angle. For example Astra2 in North Greece have 21 degree skew and in France have only 6 degree skew. You had to changeLNB skew. In my opinion +-5 degrees is quite good acuracy.
KVH M7 track vision problem.Not tracking - kvh-m7-track-vision-problem-not-tracking-0betnbuhgrcovrmdypkzkom3-3-0.jpg


Posted on Jan 25, 2015


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There are many possible reasons of this problem. Maybe antenna didn't see satellite, maybe satellite setup is wrong (frequency, bitrate and so on). The best way to solve your problem is to get logfile from antenna.

Jan 02, 2011 | KVH 01 0277 01sl Tracvision A7 Mobile...

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If you can hear the dish actually serching when it says "searching", there is a good possibility that you have a bad LNB on the dish. Unfortunately, this is not the only thing that can cause the problem. Your best bet is to call KVH @ 4018473327. Make sure you are on the boat when you call and they will run you through all of the programming checks to narrow down your issue. Good luck.

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First question, is it under warranty? If the answer is yes go to and find an authorized repair center.

If not and you feel comfortable with electronics there are a number of things you can check yourself.
*The following is based off my experience with a KVH A7, proceed at your own risk.
Step 1 take the unit off the vehicle and place it upside down on a flat surface, I use a towel to minimize any scratching.
Step 2 take all the screws out from the bottom. There are quite a few and they are all hex heads.
Step 3 once all screws are out of the bottom carefully flip the unit and separate the top from the bottom. Note the 'Dome' does not remove at this point just the plastic around it.
Step 4 remove the 4 large phillips screws holding the 'Dome' on the satellite and remove the 'Dome'
**Disclaimer** you now have access to the electronics of the satellite, be careful! Take ESD precautions and stay grounded to avoid zapping a board.
Step 5 you will notice two electric motors. One that is attached to a large belt under the 'spinning' part that rotates the satellite and the second smaller motor controls the pitch of the satellite.
Step 6 I would start to inspect all parts and see if anything looks broke or out of place. You should be able to move the satellite around in a circular motion by hand without much resistance (there should be some from the engine). If it does not spin I would check the bottom belt and or the bearing track that the satellite spins on.

I would not advise taking the unit apart any farther. Generally most problems I have seen that are not board related are pretty obvious when you get the top off. The KVH family of satellites seem to be the only piece of electronics in the world that there is no good on-line support or discussions for.

Best of luck!

Dec 20, 2008 | KVH 01 0277 01sl Tracvision A7 Mobile...

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