Has anybody out there any idea why my Kelvin Hughes 903 Radar only seems to scan a sector between 3 oclock and 7 oclock and the rest of the screen is blank. ?
something is in the way of the scanner perhaps? - need more info on installation - or perhaps its frightened of what is out there so its not showing to you incase you get worried!!
I think one of the scanners is broken in the dome - I had a mars vigil which started doing the same in Spain - the local guy just replaced the broken scanner - inexpensive... In Spain!
On some radars it is possible to set sector blanking. That is so that the radar does not transmit at set angles in the horizontal. This is common on big ships where the bow radar for example only wants to look forward and not get a huge return from its own bridge. Check if your radar has that facility and it may be set on by mistake. There will be only one scanner in the radome.