Can you clarify what you mean by DSL.

As the various standards have very different frequency bands, e.g. ADSL is just up to 1.1MHz, ADSL2+ up to 2.2 MHz. VDSL2 currently up to 17 MHz. In future VDSL2 may extend to 30 MHz

"Maybe if I do bin plots with router sat on top of a HomePlug when switch on and off we will see the clear a wiping out of swathes of the bins. If I recall I do see bins lost due to a couple of AM radio stations."

It's a start. Now repeat the same exercise with a representative sample of domestic and non-domestic wiring, not just your own. Then we're getting somewhere.

Or, do what the electronics professionals have been doing for years, go back to basics and understand that (as I just wrote to Roberto) the EMC regs are there for a purpose - to make sure that sensibly designed electronics kit can all coexist without having an EMC specialist assess every individual combination for compatibility before it's used in the real world.

The PLT people are struggling to work within the existing EMC regs, which is why they want the rules changed to allow PLT kit to SHOUT LOUDER. Then you'd probably lose a few more bins.

"The incidence level is around that of Plasma TV's causing issues, and tread mills."

What we know of those is the *reported* incidence level. The real level may or may not be higher.

If Homeplug usage increases and permissible transmission levels are increased, wil the numbers of problems increase? Yes, of course, just like 2.4GHz WiFi has become decreasingly useful as more 2.4GHz kit is deployed in a given area.

But will the number of DSL problems identified as due to PLT also increase? Different question altogether. If a pair swap or some other easy tactic fixes it without further investigation (and sometimes it will), no one will know it's a PLT problem.

Absence of evidence is not evidence of absence.

In reply to a post by Anonymous:

Absence of evidence is not evidence of absence.

Ah but it is. The hysterical squawking of Henny-Penny that the sky will fall in is just noise without evidence.

Where is your evidence of planes falling from the sky? There is none.
Where is your evidence of DSL being wiped out? There is none.

On the other hand, there are plenty of planes flying about and plenty of DSL users, which is evidence that what your are saying is mistaken.

"the various [DSL] standards have very different frequency bands, e.g. ADSL is just up to 1.1MHz, ADSL2+ up to 2.2 MHz. VDSL2 currently up to 17 MHz. In future VDSL2 may extend to 30 MHz "

Exactly. Higher speeds need to use more frequencies. Basic laws of physics. Same basic physics applies to both DSL (of whatever kind) and to PLT. They both want higher speeds, they both have to use wider frequency ranges to deliver it (if they can't improve the SNR).

The DSL people have the various DSL standards and things like the ANFP to ensure that various DSL standards and kit can coexist amongst themselves and with other electronics kit.

The PLT people have what? The figleaf of notching doesn't really cut it. Their attempt to improve the SNR is to try to change the regulatons so the can SHOUT LOUDER.

I need to be somewhere else. Enjoy the break

Even Henny Penny might have understood that if you've got two lots of folk attempting to use the same radio frequencies for different things, it may end in tears. She may not even have needed evidence, because she might have understood it from the days of AM radio when the sky went dark and you got two stations on the same frequency.

What we need is a regulator to allocate the frequencies appropriately. Perhaps OFCOM could sort it out?

In reply to a post by Anonymous:

Even Henny Penny might have understood that if you've got two lots of folk attempting to use the same radio frequencies for different things, it may end in tears. She may not even have needed evidence, because she might have understood it from the days of AM radio when the sky went dark and you got two stations on the same frequency.

He is confused enough already without getting into D layer!

There's nothing to be confused about. Without evidence, there's nothing.

So when can we expect a plane crash disaster due to HomePlugs?

About five minutes after some fool plugs one in at NATS Prestwick !

In reply to a post by professor973:

Any idea of the day, month and year?