Wireless that's "Fall off a log" easy?

??? They did. Every time we went to scan the box the "heavy hitters" were different. The couldn't repeat the tests within 6dB, when their claimed margin of error was less than 3dB (2.2, IIRC).

But how does this reconcile with the 20dB bandwidth, above? It's from the same paragraph. Transmitter can be 20dB down outside its band but still has to meet 11.209? Makes no sense.

I doubt the EMC lab is going down. It's a major corporation.

It doesn't. Interestingly, the 2.4G model does (but the harmonics are significant). I questioned it, but no one likes the bearer of bad news.

Right about the interpretation? I'm not convinced either.

turned

At what frequency then? The rule makes no sense.

[...]

big

couldn't

At very high frequencies that could be almost normal. All it takes is a couple screws not being jammed in as they were last time. Other than that, old rule: Photograph the setup from multiple angles with a wooden yard stick on the table. Believe it or not, almost nobody does. Then, next times set it up _exactly_ as in that photo. Do not let wires droop over the saw horse any differently.

down

That's one reason why I wouldn't gamble on it. Lots of rules don't make sense. But if anyone feels trampled upon such as the sheriff, he who has more muscle or deeper pockets wins. Taxpayer pockets are often deepest because it costs "nothing" :-(

Then they hopefully have good liability insurance, just in case. And your company might be more protected as long as this large EMC company blessed the gear.

Ok, that's up to corporate mgmt I guess. In medical we take such things seriously because the next bearer of bad news might be cruising into the parking lot in a car with government plates. No joke, that happened to a large ultrasound company. I bet some bigshots stood there with egg in the face.

*NOT*

and

because

turned

the

That's what I don't understand either. There may possibly be buffers between your band and any important stuff. But sometimes not. For example, there is no buffer between the DECT and the cell band. Your DECT spills over and the lawyers of some telco giant might be all over you.

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.

big

couldn't

30MHz and 230MHz are not amazingly high frequencies when the DSP is running at 100MHz.

down

Point.

(c)

They did. Big international company.

I'm sure it wasn't egg. ;-)

*NOT*

and

because

turned

the

Not according to the regs, there isn't. The process used by both cert labs is to measure the heavy hitters (above the class A/B lines) and make sure none of them are in the forbidden zones. It's a little tougher than the normal unintended radiator test because there are more edges to be concerned with.