Ku Band LNB

The Local Oscillator or l.o. in a lnb is pretuned to a certain frequency and cannot be changed by simply changing the antenna settings in the receiver to what you would like the l.o. to be. Using 9750/10750 antenna settings on a 9750/10600 lnb will not work correctly unless you physically tune the l.o. in the lnb to 10750.

I have not seen any universal type lnbs with a l.o. of 9750/10750 in many years. Good luck on finding a new one. What is the reason for wanting a lnb configured like this?
 
el bandido said:
The Local Oscillator or l.o. in a lnb is pretuned to a certain frequency and cannot be changed by simply changing the antenna settings in the receiver to what you would like the l.o. to be. Using 9750/10750 antenna settings on a 9750/10600 lnb will not work correctly unless you physically tune the l.o. in the lnb to 10750.

I have not seen any universal type lnbs with a l.o. of 9750/10750 in many years. Good luck on finding a new one. What is the reason for wanting a lnb configured like this?
Click to expand...

I always thought that you could just set it to 10750.
 
Set it to 10750 and see what happens. Some receivers will not work at all when the wrong l.o. is entered, but most will still work, except the transponder frequency will not be correct.
 
I have the same experienced. If I have a 9750-10600 lnb and set the Box to 9750-10600 I can get quality on Intelsat 58W. On the other hand I need to set 9750-10750 on others like 78W SB to get the quality in.
 
Somethng is wrong with your antenna system or receiver. You do not use different lnb settings like that.

What receiver are you using?

What are the transpnder frequences for each satellite, and what lnb settings do you need to use in order to get the transpnders?

What is the make/model of your lnb? How old is it?
 
I was trying to get 50w. Didnt get any quality at all using a regular DMS GK411-60 universal 9.70-10.60 Ghz. Using a 4 1/2 feet offset dish.
 
You are not giving me enough information to make any sense of your setup. One transponder frequency does not prove anything or even give a clue.
There is only a 150MHz of difference between 10600 and 10750 lnb l.o. frequencies. Using the wrong 10600 or 10750 l.o. frequency could still allow you to show a transponder listed in Lyngsat, but the channel information you would have for that transponder would be incorrect. I cannot tell you anything else unless you want to give detailed information on what you are receivng. EB
 
Found out what was the problem. The offset dish was warp. I uninstalled the dish and step on it till it was flat. Put everything back together and voila, got quality almost immediately. Both 50W and 58W scanned in most of the TPs in the proper freq. using the 9750-10600 setting. Thanks for all the help!!

View attachment 10858
 
This thread reminded me of a trick I used to use to tune in some weaker transponders in the 11550-11900 range.

Let's say your feedline/receiver naturally has less loss/more signal in the 950-1450 range. Setting the LO to 10600 would downlink the 11550 -11900 range to this lower range. Setting the LO to 970 would increase the signal loss slightly, because the receiver would have to tune to a higher frequency range.

Anyway, my main reason for using 10600 was for feed hunting on the spectrum analyzer, since it would only go up to 1700MHz. I couldn't see many frequencies on the other LO.

But I digress...
 
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