|
Jul 10th, 2011 at 8:11am
Regarding pointing, the really important thing is to peak up to the exact peak. The actual level you measure will depend on your location relative to the nearest satellite spot beam centre. To get your dish pointed perfectly move off either way (in both azimuth and elevation) and find two exactly equal degraded points, then put to the exact centre.
Your dish works in Ka band (20/30GHz) and has very narrow beam, particularly at the transmit uplink frequency so exact central pointing is important. In clear sky conditions the signal is very strong and the system will work, on receive, over a wide range of antenna mispointing. This is very misleading to the naive installer - just getting a good enough signal is NOT acceptable. You must actually get to the beam centre. The top of the receive beam is rounded and finding the centre is not at all obvious. You must get to the centre so that the transmit beam, which is narrower, is also pointed well. The system will then continue to operate in moderate rain. If you are mispointed the system will fail as soon as it rains.
Best regards, Eric.
|