Dedicated 16 metre run of new RG6, with F connectors crimped on by an antenna installer, into a MagicTV 3600 set-top box, into a 42 inch Plasma TV (no digital tuner).
I do not go through a wall plate, the RG6 comes into the lounge through a hole in the floor.
I have the antenna mounted on the roof, on a 2 metre pole which is secured by a roof mount, with 2 aluminium stays. It does not move around.
I have had an antenna installer up on my roof, aligning my single phased array antenna http://matchmaster.co.nz/uhf-tv-antennas/02mm-mdu18
& taking a signal strength reading. He got 60 decibels of signal. That must be when I am getting no drop-outs.
I have been getting occasional audio drop-outs for a while & some quite bad pixelation. I noticed the following, when I display my Magic TV set-top boxes RF Signal Monitor:
Ch 33 (TV3, Four ,C4) normally fluctuates between 79% - 80% Signal Strength & Signal Quality is 100%.
Ch 35 (TV1, TV2, U, TVNZ7) normally fluctuates between 76% - 78% Signal Strength & Signal Quality is 100%.
Ch 37 (Maori, Prime, Trackside) normally fluctuates between 75% - 78% Signal Strength& Signal Quality is 100%.
Over a ten minute period, the S/S will suddenly drop to low 50's. The S/Q will drop to 90%.
The signal & quality will come back up & drop again straight away to a different reading. My box samples once a second & those large variations take no more than a few seconds before all is normal again ... until the next time. I can have no pixelation for hours some days & other days, a fair bit.
I have tall thin Blue Gum trees 300 meters distance between my home & the transmitter.
With me getting the 75% to 80% S/S, I wonder why the signal fluctuates between those two values. I would have thought that the transmitter would put out constant power?
The antenna installer says that in his installing experience, the trees are far enough away to not cause a problem. If they were blocking/degrading the signal, I should be getting a much weaker signal, not the 60 decibels that I do.
I am going to replace my antenna with a twin phased array, this one http://matchmaster.co.nz/uhf-tv-antennas/phased-array/02mm-mdu36
If, after doing that, I still get the pixelation, what sort of masthead amplifier would I need to try?
It will only ever be used with the UHF antenna, no VHF or FM.
What brands/models are good & what to stay away from?