Hello all and hope everything is fine with you all!
So I have been doing some review/ learning about antennas. I found this, what I think is a, low-noise block downconverter (LNB) in the basement. (The roofers removed it when I got a new roof a while ago).
The picture above, pic # 1 shows the LNB. What is the purpose of the white caps/lids?
In pic # 2, Why does the LNB on the left have those “steps” looking formations but the LNB on the right does not?
In pic # 3 above, what are the 2 items shown with the green and orange arrows? Why are the white tabs 90 degrees off compared to the LNB on the left versus the LNB on the right? ( The orange arrow is pointing to a yellow plastic tab thing that can be broken with half a newton of force. You can see a better view of that yellow tab in pic # 6 below. )
In pic # 4 above, why do you think the body is long and doesn’t have those “Steps” like in pic # 2 above?
In pic # 5 above, why doesn’t the inside of the waveguide have “steps” similar to pic # 3 above? Why is the inside "oval" ?
In pic # 6 above, in the center top part of the pic, you can see where the LNB from pic # 4 used to sit. Does the radius of those 3 holes mean something? Why did the designer pick holes of that exact size?
Thank you for the replies!
So I have been doing some review/ learning about antennas. I found this, what I think is a, low-noise block downconverter (LNB) in the basement. (The roofers removed it when I got a new roof a while ago).
The picture above, pic # 1 shows the LNB. What is the purpose of the white caps/lids?
In pic # 2, Why does the LNB on the left have those “steps” looking formations but the LNB on the right does not?
In pic # 3 above, what are the 2 items shown with the green and orange arrows? Why are the white tabs 90 degrees off compared to the LNB on the left versus the LNB on the right? ( The orange arrow is pointing to a yellow plastic tab thing that can be broken with half a newton of force. You can see a better view of that yellow tab in pic # 6 below. )
In pic # 4 above, why do you think the body is long and doesn’t have those “Steps” like in pic # 2 above?
In pic # 5 above, why doesn’t the inside of the waveguide have “steps” similar to pic # 3 above? Why is the inside "oval" ?
In pic # 6 above, in the center top part of the pic, you can see where the LNB from pic # 4 used to sit. Does the radius of those 3 holes mean something? Why did the designer pick holes of that exact size?
Thank you for the replies!