Captain Jack
Burnt out human
- Joined
- Oct 21, 2006
- Messages
- 11,812
- Reaction score
- 7,995
- Points
- 113
- My Satellite Setup
- See signature
- My Location
- North Somerset
I am a newbie to the multiswitch territory but I've got a Vision multiswitch with an Inverto quattro LNB. All connected up but I am a bit confused as to what various dB readings mean.
First is max B/A gain. My Ku LNB is connected to the A ports, so I am looking at max gain of 10dB or 8dB depending on which receiver port I am connected to.
In addition there are adjustable "pots" for each of the inputs, which I gather change the "gain", between 0dB and 8 or 10dB ?
My confusion lies in the fact that to get maximum SNR reading on the receiver, I have to turn the gain to the minimum. I would have thought that with a ~35m cable run, I would need to turn up the gain even a little but looks like not? Why would increasing "gain" reduce SNR? Is it because on adding gain I am also adding noise?
Confused...
First is max B/A gain. My Ku LNB is connected to the A ports, so I am looking at max gain of 10dB or 8dB depending on which receiver port I am connected to.
In addition there are adjustable "pots" for each of the inputs, which I gather change the "gain", between 0dB and 8 or 10dB ?
My confusion lies in the fact that to get maximum SNR reading on the receiver, I have to turn the gain to the minimum. I would have thought that with a ~35m cable run, I would need to turn up the gain even a little but looks like not? Why would increasing "gain" reduce SNR? Is it because on adding gain I am also adding noise?
Confused...