Reply to thread

Message

<blockquote data-quote="CyberOLi" data-source="post: 580837" data-attributes="member: 313452">Hello there,I don't know if&nbsp; it is the right section to post in but i didn't find a better one so ;).I work for a company that provides Internet access for mobile environment. For this we use a satellite link&nbsp; to provide a two directions access to the Internet. I have recently installed an equipment using a SCPC channel for prototype purpose. On the forward link there is no problem whereas on the return link that's another story. When everything goes well, it works good 5Eb/No on the return link of 10 d<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite6" alt=":cool:" title="Cool&nbsp; &nbsp; :cool:" loading="lazy" data-shortname=":cool:" /> BUT sometimes the link is very unstable: the HUB modem sees an Eb/No fluctuating between 0 and 4 dB over a long period of time. At same time we can hear the repetitive sync and unsync of the modem. It stays like that over a large period of time and then the problem is fixed on its own. After having done a inspection of the installation in the HUB, i can tell that the problem is not coming from there. The problem is coming from the mobile unit on the ascending return link. I am just wondering if some guys here around have already experienced that kind of problem and if yes what was the cause of it? I know that i could change the terminals and do a &quot;environmental noise&quot; analysis but i am a bit far from there so perhaps there is another solution.The more insights i get, the best it is. In advance thank you.</blockquote>

[QUOTE="CyberOLi, post: 580837, member: 313452"] Hello there, I don't know if it is the right section to post in but i didn't find a better one so ;). I work for a company that provides Internet access for mobile environment. For this we use a satellite link to provide a two directions access to the Internet. I have recently installed an equipment using a SCPC channel for prototype purpose. On the forward link there is no problem whereas on the return link that's another story. When everything goes well, it works good 5Eb/No on the return link of 10 dB) BUT sometimes the link is very unstable: the HUB modem sees an Eb/No fluctuating between 0 and 4 dB over a long period of time. At same time we can hear the repetitive sync and unsync of the modem. It stays like that over a large period of time and then the problem is fixed on its own. After having done a inspection of the installation in the HUB, i can tell that the problem is not coming from there. The problem is coming from the mobile unit on the ascending return link. I am just wondering if some guys here around have already experienced that kind of problem and if yes what was the cause of it? I know that i could change the terminals and do a "environmental noise" analysis but i am a bit far from there so perhaps there is another solution. The more insights i get, the best it is. In advance thank you. [/QUOTE]

Verification