My thoughts EXACTLY. Invisible ink even better.
73 Martyn G3UKV
On 23/04/2021 10:27, Andy G4JNT wrote:
just stored at home
means any I bother to do may well will be written on the back
of a used envelope in green ink
all taking this far too seriously.
The thing that I don’t understand is what is
done with the assessments. Are they stored at home in case
they are asked for or do they have to be submitted to Ofcom
and updated when necessary.
That should, of course read wary. Not
Sent tomorrow from my time machine
Being a little unwary of computer
EMF models/calculators for ICNIRP, I have been
doing some measurements on my 23cm EME system,
using a calibrated portable spectrum analyser and
an antenna with a known antenna factor. The
results have been interesting and do actually bear
out some of the calculated numbers.
I felt that I would be happier knowing actual
W/m2 levels at points of public access near my
premises, on the bands above 1GHz, rather than
relying completely on calculated values in a
highly complex environment, where vegetation,
fences and relative access height are all
factors that affect the real levels.
73 de Sam, G4DDK
I suggested before a simple
pir to turn off the tx, if someone is
standing in front of the dish. You would not
be communicating then anyway.
Seems like a good idea particularly to
stop someone looking down the waveguide,
while you are sorting another problem.
I am intending to do some real life
measurements against icnirp levels with a
Narda s3 personal monitor, especially for
the bands above 10GHz. As it will be near
field the calculator is not a lot of use,
even if it worked above 10G.
Great. That makes it all seem a
don't transmit with anyone
standing in front of the
dish - and if you feel you
must, write down that that
would be the case. No need
to rope off
wouldn't have anyone
standing there for 6 minutes
while you're working anyway,
I have done my calculation
for 10ghz portable using 5
watts and a 48cm dish with
I hadn’t realised just how
good waveguide is as regards
losses are concerned. My
duty cycle is quite low.
The separation distance
given at the end is 1.8
metres. I presume that the
only reliable way of
achieving this is to
rope off a radius of 1.8m in
the favoured directions. Any