Signal strength

Trying to do your own EMI testing can be a nightmare without an anechoic chamber. An analyser and antenna will cost a lot and the results may well be inconsistent and dissapointion. I'd recomend booking half a day at your friendly local test house, taking as many things to test as possible and try for a 'quick look see', I've done this a few times to get base 'reference' data for products and then done rough tests myself with an analyser and antenna as a comparison against the references...

The whole topic is a nightmare and any company that does full testing of all it's products would soon go bust!

(Just my opinion folks..usual disclaimers apply...)

Well, I work at NASA and I have all your tax money to spend, so the $30K I'm spending on the analyzer is not a problem. We actually have a huge anechoic chamber and a staff of charge number munching civil servants to run it. The problem is everything has to be done by a test procedure and once the procedure is written down it's hard to make changes on the fly and say "Ooooh - let's try this."

So, we'll be using the chamber for our "official" qualifying tests - of which there are a gazillion, but we want something in the lab so we can be actual engineers and design stuff.

Now, answer the $#@&* question!

Interesting response.

Since you work at NASA why not use their recources and as you so delicately put it.....

Answer your own $#@&* question!!!

Sorry couldn't resist

OOOOh! Burn!

Because I'm looking for a simple answer.

Oh ...well you don't need me to tell you then....

If you can purchase an Eqpt worth thousands of dollars then there is no problem for you to buy a good "Field-Strength-Meter" worth 100s dollars only.

The level of your home depends on the highness, power of transitter and distance betweeen the tow spot.( assume stardard state)

you must concern health problem.

its about 30--100DBm I ring a bell.

you can check radio reference for detail formula.

B.

Lots of stuff on this topic on the FCC web pages--not necessarily easy to find though. The first part of your question, signal level at iyour house in mV/m or dBu can be found from standard Longley-Rice field strength calculations. Same stuff we go through when building a new radio station. Class C FMs go to 100kw typically. Longley-Rice prediction is used to show us where our 60db and 70db contours will be so that we don't interfere with other stations. Any good RF engineering house can give you the answer you need. Recommend Hatfield and Dawson, out of Seattle as I recall.

Lonnie

It doesn't really matter...you'll just get a nice spike at the transmitter frequency...it's hardly going to swamp the entire RF spectrum...

Mind, maybe I shuold run any comments past RF Guy first in case I don't have the faintest idea?

It sounds like I will have to get my answer empirically.