|
Oct 3rd, 2009 at 2:04pm
It seems to me that one of the big problems getting VSAT systems to work well is the skill needed by installers to comprehend and set up linear polarised systems at the correct polarisation angle. Poor accuracy leads to transmit interference and service problems in the years ahead with frequency reuse when traffic on both polarisations exists. There is too much pressure on installers to rush the job and hub staff don't have the time to spend 15 - 30 minutes doing CW cross-pol tests for every install. In Tooway there are reports of no testing being done at all.
I believe that Tooway and KaSat are wrong to have chosen linear polarisation. They should have chosen circular polarisation instead, like Wildblue. There (in US and Canada) customer sites either work perfectly or not at all and there is no adjustment angle to apply or cross-pol interference problem. Comments welcome.
Best regards, Eric.
|