http://www.soundonsound.com/sos/1994_ar ... loops.html
http://en.wikipedia.org/wiki/Electromag ... patibility
http://en.wikipedia.org/wiki/Common-mod ... tion_ratio
….. can I have some explanation of the following:
"ground loop" - What is exactly mend by this?
"CMRR figures"? (Ramos) - What does it stand for?
It is worth mentioning that you can have RF star earthing technique
And does grounding not increase the risk of a lightning strike?
Using lightning arrestors, are they to be fit near the antenna or near the radio? (If antenna in top tower where board is at bottom).
On metal towers, still advised to run ground from top to bottom? What about the risk of lightning strikes? The better earth of the tower top to earth the higher the risk of lightning strikes?
Yes as lighting will take the path of least resistance to ground and in an area prone to lighting strikes perhaps the use of a de-ionizer unit at the very top of mast. Also if you use a timber pole as a mast then use a de-ionizer at the top and run a earth lead direct to ground earth, AP and Ptp equipment below the timber pole top conect to cabin earth ONLY.
Can the earth grid of a building (that comes with the electrical installation) be used for grounding antenna's/radio's or is it better to use separate? (Since these wires usually run parallel to the power lines would that carry inductive frequencies/magnetic pulse onto the earth we use for the radio installation? If not advices, what is than the best way to ground indoor installation?
Use of shielded cable; some say it has to be earthed on both ends, but others claim it is not needed. Some even say it still protects against interference (other task of the shield) even if not earthed.
I know about the "cage of farraday" but never learned about the need of connecting it to earth. Like a car is working as a cage of farraday but is definitely isolated to earth!
If the cabin has a separate earth to the mast (metal as opposed to timber mast pole mast) then first have the earths tested as being effective then in the case of having two good earths, I would use the cabin earth for equipment in the cabin and on the mast use the mast earth , connect both ends of shielded cables from the AP to cabin earth and NOT connecting board earth to the mast earth so you will have two separate earths with no loops.
How does external frequencies (50/60Khz elec grid pulse, other sources) influence the Ethernet (10/100/1000Mb) connection?
Ever wondered why there is inductive beads on AC power leads (50/60hz power leads) and inductive beads with de-coupling capacitors on DC rail voltages inside digital equipment running at MHZ or GHZ frequencies?
RF #Hash# suppression.