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Originally Posted by Ignition
How many people here have any idea what this is supposed to mean?
More to the point find me a cableco whose return paths are set up to handle that powerful a signal. As you very well know this is why power budgets are calculated across the coaxial segments and amplifiers set as they are so that when signals hit the fibre nodes they aren't at an excessive power to overdrive lasers to clipping or shutdown point.
Amazingly enough people opening up cabinets and inserting oscillations onto return path is not exactly common, and the naturally occuring impediments I've seen don't come close to doing this.
You also might like to know we're using a different supplier to the one you probably worked with now.
Nice try again though. 
EDIT: Apologies to those wondering what the hell, he was trying to make out ntl's network is substandard because firing a signal a hell of a lot stronger than it's specified to handle will break it... duh. |
Oh, but people do open the cabinets and put oscillators onto the retrn path network daily!!!! suprise suprise....how else do they set the pad and EQ's at the DA's and Node?
(they can also use the stealth, but this is just a swept carrier that has to be programmed to miss the return path alocations in use)
Different supplier makes no difference, it's all the same principle. Some lasers will shut down and some will go into distortion.
you are certainly showing ignorance by saying the strong signal would break it....duh. but then again it wouldn't take much signal injected at a customers isolator box to take out the directional coupler, that would be no use as it would most likely have affect on the silly customer or neighbouring ports on the tap. If any of the network techs have taken a tap apart they will tell you they are grouped.
There is a lot of things that the vast majority of ntl employees on this board don't know about their HFC network, there are many who think they do but the people with hands on experience at optical/RF level are very few and far between here. I raised issues with a former boss about the silly information on frequency allocations that were being made available on .com for the return path. ntl employees were openly giving out the safe combination numbers to would be sabotage/disgruntled employees and customers.
A little knowledge is very dangerous.
Go away and talk to someone who understands to component level, and they will tell you it only takes about 5 capacitors, 4 resistors, 3 coils and 1 transistor, and a PP3 battery to give 1 watt of RF, enough to wipe out an entire node!
If I was such a bitter twisted ex-employee with all the components at hand to make hundreds of these, wouldn't I of been knocking them out by now?
