Single feedhorn or dual feedhorn?
Posted: Sat Nov 03, 2018 3:21 pm
Hello,
We are enjoying our C band system immensley. The current LNB position on the dish is barely able to tune all the channels we are interested in.
I adjusted the LNB position in the feed horn and peaked the SNR on Galaxy 13 (NASA 3920V) and Galaxy 14, to SNR of 14.9 - 15.2 on NASA, and
14.7 on a C band transponder on Galaxy 14. This was what I considered awesome for C band, and the C band channels we were interested in
tuned very nicely with the LNB setting. However the Ku channels on Galaxy 14 dropped to 0 SNR. I re-adjusted the LNB, and found a setting
where we are able to get both the C band channels (some just barely), and the Ku channels. The NASA 3920 transponder is down to 13.6 SNR,
and the Galaxy 14 transponder went down from 14.7 to 11.4. If the single LNB feedhorn was swapped out with a dual LNB feedhorn, would this
allow both C and Ku LNBs to increase their SNR? Would the C band LNB occupy the prime focus, or would neither of the LNBs occupy the prime
focus position? Any help on this would be appreciated, as I am unsure on how to best proceed.
Cheers and have a great day,
belter-one.
We are enjoying our C band system immensley. The current LNB position on the dish is barely able to tune all the channels we are interested in.
I adjusted the LNB position in the feed horn and peaked the SNR on Galaxy 13 (NASA 3920V) and Galaxy 14, to SNR of 14.9 - 15.2 on NASA, and
14.7 on a C band transponder on Galaxy 14. This was what I considered awesome for C band, and the C band channels we were interested in
tuned very nicely with the LNB setting. However the Ku channels on Galaxy 14 dropped to 0 SNR. I re-adjusted the LNB, and found a setting
where we are able to get both the C band channels (some just barely), and the Ku channels. The NASA 3920 transponder is down to 13.6 SNR,
and the Galaxy 14 transponder went down from 14.7 to 11.4. If the single LNB feedhorn was swapped out with a dual LNB feedhorn, would this
allow both C and Ku LNBs to increase their SNR? Would the C band LNB occupy the prime focus, or would neither of the LNBs occupy the prime
focus position? Any help on this would be appreciated, as I am unsure on how to best proceed.
Cheers and have a great day,
belter-one.