I have a problem. I'm trying to run a cable line to our back house (not all that glamorous, it's more of a shed) and it's not working. Currently I have a line running from a splitter in our basement, out under the deck, through the house wall, and in to a TV. Every time you split a cable signal, you end up with half the original signal strength. If you've split the signal 2-3 times by the time you get your line to the back house, it is completely reasonable for the signal to be too degraded to be useful. I doubt you are getting OTA signals.

1. How Long Can A 4k Hdmi Cable Be

More likely you just don't have the signal strength to get a real picture. I'd run from the cable company splitter. 75' should be fine, so long as you use a quality cable.Also, it is fairly easy to damage a coax cable by bending it, so you might have a bad cable as well. Sounds like this is leaning more towards 'damaged cable' than anything else. It's an old RG59 cable that was strung under the deck when we moved in; I have no idea how long it has been there.

I plugged one end into a splitter in the house, and shoved the other through the wall into a wiring box. Hooked up a TV and nada. Chopped off the old connectors yesterday, re-crimped both ends and still nothing.So last night I hit Home Depot and picked up a 100' roll of good quality RG6 and a pack of crimp-on ends. I do my own cables a lot, so termination shouldn't be a problem. I haven't dealt with distances like this before, which is why I was so uncertain about the signal issues.Anyway, tonight it's going to be run directly from the cable company splitter and we shall see what happens. It may very well be a cable issue, but removing the entire home-wire-chaos situation from the equation at the same time seems like it makes the most sense.I do have a spare 4-way amp, but I don't want to use it unless absolutely necessary since a) I'd have to find a way to shield it from the elements, and b) it screws with my digital cable something fierce. (can't access On Demand, and it causes nasty drop-outs and picture issues).

100ft or 200ft shouldn't be a problem. You lose about 4.9DB of signal over 100ft of RG6. For standard TV this is not really a problem if your source is good (you said you had good quality reception in the basement). If the new cable doesn't work, try a direct connect to your outlet, bypassing the splitter. You can have a bad split, or the split might be introducing too much loss.

A traditional 2-way split will add 3.5db of loss, but they make some splits (couplers) that will have one side of 1.5db or so of loss. Anyway, bypassing the splitter will tell you whats up.To make life easy, you can test the cable first in your basement before running it to your shed. If it won't get a signal to your basement TV, you have a problem.And regarding the comment about about 'thousands of feet.' That is true, but the main line cables are MUCH thicker copper and are also strung between high power amplifiers and line extenders. Mac screenshot to clipboard high sierra. They are also 'powered' lines, unlike the lines in your house which have no risk of shock. That's why when there is an outage in your neighborhood, your cable goes out.

Because the power to the amps is gone. Originally posted by oatmeal:And regarding the comment about about 'thousands of feet.' That is true, but the main line cables are MUCH thicker copperEr, no, they're not. Signal loss in this case is not due to resistance, it is due to capacitance and inductance in the cable. And due to skin effect, thicker conductors are not going to help much with resistance.As a matter of fact, the coax strung between the poles uses a copper-plated steel center conductor; skin effect keeps the signal all in the copper. Er, no, they're not. Signal loss in this case is not due to resistance, it is due to capacitance and inductance in the cable.This is mostly incorrect.

Signal energy loss in a transmission line is due to distributed series resistance and parallel conductance. There's a reason you leave those terms out when modeling a transmission line as lossless.The effects of dispersion and reflections, however, (which are due in part to the propogation speed and characteristic impedance determined mostly by the inductance and capacitance) can functionally be considered 'loss' since it results in signal distortion. Originally posted by stud:The line amps are fed their operating power through the coax I/O cables, the power supply may be in 'your neighbourhood', and may not be. You could lose power to your neighbourhgood, while the CATV amps remain operational because they're fed from somewhere else.but you'd never know because your power would be off.Not always. There are plenty of pole-mounted amps that are fed by power company feeds on the pole, which is why you see pole-mounted power meters. Fiber regen amps are also fed from the pole power. Signal loss in this case is not due to resistanceso you can make a cable out of wood and it'll still transfer rf?hehe.i really don't buy the 'coax can run on very big distances without loss' crap.it can't.

Just like any other type of conductor.' Attenuation or loss, in decibels per metre. This is dependent on the loss in the dielectric material filling the cable, and resistive losses in the center conductor and shield.'

DriverGuru does state 'in this case' and he is correct. I wouldn't go as far as saying resistance is not a factor at all in signal loss, but because of the high frequencies involved lowering the resistance of the cable by increasing it's cross sectional area, to reduce loss due to resistance, is not all that helpful due to the 'skin effect'. The 'skin effect' causes much more signal loss than resistance. It's an old RG59 cable that was strung under the deck when we moved inFor God's sake, get rid of it.(edit) Oh, wait, you did.

Great move.For anyone else:Who knows what happened to that stuff? It could have nails driven through it (since removed) and all sorts of things that only a painstaking inspection might find. Rocks could have scratched the shield just enough to let water in, connectors might have aged and done the same thing. All of these relatively small defects can totally screw up a cable run.Get some quality RG6 cable (maybe a buck a foot) and have done with it. Don't split it any sooner than you have to or oftener than you have to.Any library should have the American Radio Relay League's Handbook.

How Long Can A 4k Hdmi Cable Be

In its chapter on Transmission lines, you can find a very handy little chart (once you invest a little time to learn to read it) that will tell you about attenuation for various sorts of coax depending on the frequency.(It should also lay to rest some of the side discussion here, BTW).The higher the frequency, the more the losses per foot (per hundred feet as the chart has it, same thing of course). IIRC, Cable TV channels I presume eventually get into the higher MHz ranges (maybe 600 MHz on the top end - 100 standard cable chanels times 6 MHz each, you do the math). You can look up the frequencies with Google and see what the higher channels are like (if you have them) or the top end of whatever cable setup you use.But, yeah, once I got cable I knew I could trust, a run of a hundred, hundred fifty feet or so was no problem. Just use a little geometric commonsense so you don't have to double back too much as you get to your central distribution and then redestribute around the house.An amplifier should not be necessary, can be counter-productive, and may even violate your cable company's agreement if that's relevant here.