measuring the "V/m" in large frequency range with spectrum analyser ?

Hello,

I have a question.

Suppose the following:

A 'spectrum analyser' measures the individual field strenghts (V/m)
in the range 800 Mhz - 3 GHz, with most high values coming from
GSM 900 (0,8 V/m), GSM 1800 (0,4 V/m) and UMTS (0,5 V/m).

Now my question. Can you see the total field strenght (V/m) in
the large range of 800 MHz - 3 GHz with a spectrum analyser also ?
I don't now much about these things. Is the total field strenght
(in V/m) in that range the same as the maximum value of the
different frequencies, in this case 0,8 V/m ?
Will a 'broadband meter' measure around 0,8 V/m in the same
range then ?  

And what if you are measuring in µW/m² ?

Some links where I can find answers to these technical questions
are welcome too.
   
Best regards,
Joris Everaert

Hello Joris Everaert,

you may have a look at www.milieuziektes.nl or www.milieuziektes.be

Starting from Pagina100.html, it is in english.
Before that it is in dutch.

But I suppose that Drasko can tell you everything you want to know.

Greetings,
Charles Claessens
member Verband Baubiologie
www.milieuziektes.nl
www.milieuziektes.be
www.hetbitje.nl
checked by Norton Antivirus



----- Original Message -----
From: "Joris Everaert" <[hidden email]>
To: <[hidden email]>
Sent: Wednesday, September 21, 2005 12:46
Subject: [eSens] measuring the "V/m" in large frequency range with spectrum
analyser ?

Thank you Charles. I will take a look and other answers are welcome.

Note: I bought the Spectran HF-6080 from Aaronia. Yes I did..
Next week I will do a comparative test with another spectrum
analyser (R&S) at the official Belgian center of EMF control (BIPT),
and will see what it gets. I have 30 days for testing.

I saw somewhere in this forum that with a spectrum analyser, for
the "sum" (total) of the field strenght in V/m over a wide
frequency range, the separate values must be raised to the higher
power (max), added together and from the sum, the square root
must be drawn in order to determine the total load in that range.
Is this true ?
If the values are in µW/m², the separate values can just be added
together.

best regards,
Joris Everaert




--- In [hidden email], "charles" <charles@m...> wrote: spectrum (V/m)
> > in the range 800 Mhz - 3 GHz, with most high values coming from
> > GSM 900 (0,8 V/m), GSM 1800 (0,4 V/m) and UMTS (0,5 V/m).
> >
> > Now my question. Can you see the total field strenght (V/m) in
> > the large range of 800 MHz - 3 GHz with a spectrum analyser
also ?

Hello Joris,

V/m is the unity for the electrical field, and for knowing the density
(Leistungsflussdichte) it must be calculated.
uW/m2 is the unity for the density, and they may be added up.

It is nice that you support Aaronia, so that they will have a little cash in
order to pay their bills of lawyers and court expenses.
But if you do not know the difference between V/m and uW/m2 (and that is
quite normal for ordinary people) it is obvious that you are not familiar
with measuring techniques. Therefore you will have a lot of arising
questions with handling your Spectran, which requires still some background
knowledge.
It is certainly not a *point and read* instrument.
It is rather complicated with all those knobs and buttons and schemes.

Greetings,
Charles Claessens
member Verband Baubiologie
www.milieuziektes.nl
www.milieuziektes.be
www.hetbitje.nl
checked by Norton Antivirus



----- Original Message -----
From: "Joris Everaert" <[hidden email]>
To: <[hidden email]>
Sent: Wednesday, September 21, 2005 17:01
Subject: [eSens] Re: measuring the "V/m" in large frequency range with
spectrum analyser ?

Hello Charles,

I know the main difference between V/m and uW/m2, but not (yet)
all the technical details around it. I am learning about the
issue now...

Note. If I am not satisfied with the Spectran, I can send it back
and get my money back also. I decided to take the chance and will
know more after my visit next week at the Belgian center of EMF
control. Will keep you in touch.

Best regards,
Joris Everaert
Biologist
Belgium
 

--- In [hidden email], "charles" <charles@m...> wrote:
> Hello Joris,
>
> V/m is the unity for the electrical field, and for knowing the
density
> (Leistungsflussdichte) it must be calculated.
> uW/m2 is the unity for the density, and they may be added up.
>
> It is nice that you support Aaronia, so that they will have a
little cash in
> order to pay their bills of lawyers and court expenses.
> But if you do not know the difference between V/m and uW/m2 (and
that is
> quite normal for ordinary people) it is obvious that you are not
familiar
> with measuring techniques. Therefore you will have a lot of arising
> questions with handling your Spectran, which requires still some
background
> knowledge.
> It is certainly not a *point and read* instrument.
> It is rather complicated with all those knobs and buttons and
schemes. with
> spectrum analyser ?
>
>
> >
> >
> > Thank you Charles. I will take a look and other answers are
welcome.
> >
> > Note: I bought the Spectran HF-6080 from Aaronia. Yes I did..
> > Next week I will do a comparative test with another spectrum
> > analyser (R&S) at the official Belgian center of EMF control
(BIPT), www.milieuziektes.be
> > >
> > > Starting from Pagina100.html, it is in english.
> > > Before that it is in dutch.
> > >
> > > But I suppose that Drasko can tell you everything you want to
know. with from
> > > > GSM 900 (0,8 V/m), GSM 1800 (0,4 V/m) and UMTS (0,5 V/m).
> > > >
> > > > Now my question. Can you see the total field strenght (V/m)
in
> > > > the large range of 800 MHz - 3 GHz with a spectrum analyser
> > also ?
> > > > I don't now much about these things. Is the total field
strenght
> > > > (in V/m) in that range the same as the maximum value of the
> > > > different frequencies, in this case 0,8 V/m ?
> > > > Will a 'broadband meter' measure around 0,8 V/m in the same
> > > > range then ?
> > > >
> > > > And what if you are measuring in µW/m² ?
> > > >
> > > > Some links where I can find answers to these technical
questions

Dear Joris,

At the moment I suggest you to ignore complication with sums and be
concerned with particular readings, especially the highest, and it's
comparation to the standards of your choice. (Would you still wish to know
how to add tell me in a private mail.)
I don't have a Spectran, but as I understood it offers such comparation?!
Please let us know what you would find out in Belgium!

Drasko


----- Original Message -----
From: "Joris Everaert" <[hidden email]>
To: <[hidden email]>
Sent: Wednesday, September 21, 2005 6:58 PM
Subject: [eSens] Re: measuring the "V/m" in large frequency range with
spectrum analyser ?



Hello Charles,

I know the main difference between V/m and uW/m2, but not (yet)
all the technical details around it. I am learning about the
issue now...

Note. If I am not satisfied with the Spectran, I can send it back
and get my money back also. I decided to take the chance and will
know more after my visit next week at the Belgian center of EMF
control. Will keep you in touch.

Best regards,
Joris Everaert
Biologist
Belgium


--- In [hidden email], "charles" <charles@m...> wrote:
> Hello Joris,
>
> V/m is the unity for the electrical field, and for knowing the
density
> (Leistungsflussdichte) it must be calculated.
> uW/m2 is the unity for the density, and they may be added up.
>
> It is nice that you support Aaronia, so that they will have a
little cash in
> order to pay their bills of lawyers and court expenses.
> But if you do not know the difference between V/m and uW/m2 (and
that is
> quite normal for ordinary people) it is obvious that you are not
familiar
> with measuring techniques. Therefore you will have a lot of arising
> questions with handling your Spectran, which requires still some
background
> knowledge.
> It is certainly not a *point and read* instrument.
> It is rather complicated with all those knobs and buttons and
schemes. with
> spectrum analyser ?
>
>
> >
> >
> > Thank you Charles. I will take a look and other answers are
welcome.
> >
> > Note: I bought the Spectran HF-6080 from Aaronia. Yes I did..
> > Next week I will do a comparative test with another spectrum
> > analyser (R&S) at the official Belgian center of EMF control
(BIPT), www.milieuziektes.be
> > >
> > > Starting from Pagina100.html, it is in english.
> > > Before that it is in dutch.
> > >
> > > But I suppose that Drasko can tell you everything you want to
know. with from
> > > > GSM 900 (0,8 V/m), GSM 1800 (0,4 V/m) and UMTS (0,5 V/m).
> > > >
> > > > Now my question. Can you see the total field strenght (V/m)
in
> > > > the large range of 800 MHz - 3 GHz with a spectrum analyser
> > also ?
> > > > I don't now much about these things. Is the total field
strenght
> > > > (in V/m) in that range the same as the maximum value of the
> > > > different frequencies, in this case 0,8 V/m ?
> > > > Will a 'broadband meter' measure around 0,8 V/m in the same
> > > > range then ?
> > > >
> > > > And what if you are measuring in µW/m² ?
> > > >
> > > > Some links where I can find answers to these technical
questions






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