Re: serit tuners ?
Posted: Thu Sep 05, 2019 7:30 am
Like this. You don't adjust it, you set your IF gain appropriately with amplifiers or attenuators if necessary.
Mike
Mike
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Sean - do you know what type of cable Virgin media use to make the connection between the outdoor termination point and the indoor modem/router? I'm looking to replace and/or extend a length of it, but haven't a clue what the spec is.sean2e0saf wrote: ↑Thu Sep 05, 2019 9:56 amThe set up is a 1.5mtr prime focus dish with approx 20mtrs of cable tv virginmedia quality coax maximum...
I too have the Sad Face, my dish is a 1.2m CM with an Octagon Green Quad, my MER is usually 8-8.1 but at the moment my LNB is not in the right place as I changed to an adjustable bracket and not tightened it up so it moves in the windsean2e0saf wrote: ↑Thu Sep 05, 2019 12:45 amjean-pierreF6DZP wrote: ↑Wed Mar 06, 2019 6:54 pmNo, it is not a problem if you observe the LNA gain. The best is to have 13dB gain.
This LNA has an AGC so if the signal is too much high, its gain goes down and at the end it acts as an attenuator.
If you see that your LNA gain is less than 3dB or negative (=attenuator), you know that your input signal is too high.
So, Just to observe the LNA gain to know what could be bad on this side.
(Near the LNA gain, I have added an emoticon in the version 0.9 to give more advertising about the Input signal when it is too high)
This LNA chip is used by ST Micro in their Professional Demo PCB.
Jean-Pierre F6DZP
how do i change the lna gain.. i see 0.9db at the moment sad face
Thanks, Sean - that's probably the stuff... In previous installations I've had, the outdoor cabling was 'figure 8' zip apart combined coax and telephone cable, but there was no facility for landline phones here when Virgin first came around, so this installation is coax only.sean2e0saf wrote: ↑Mon Sep 09, 2019 11:26 pmhi john to be honest mate i have no idea... the cable im using is the cable that comes in from the street to the brown box on the wall outside.
a local ham here has a large roll of it.. i do believe its commscope cable but no other markings i have looked on net and im sure its this
https://www.commscope.com/catalog/cable ... x?id=25190
exactly how good it is at 10ghz i dont know.
it is coated internally with sticky waterproofing gel
hope this helps