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sdy
Guest

Tue Jan 08, 2019 3:45 am   



What is FCC limit on unlicensed ERP at 8.3 Ghz and 7.2Ghz? Doing some testing into patch antennas and don't want a visit from FCC.
or maybe I'll just stick the patch into a piece of RF foam adsorber in a cup.


Guest

Tue Jan 08, 2019 4:45 am   



On Monday, January 7, 2019 at 9:28:23 PM UTC-5, sdy wrote:
Quote:
What is FCC limit on unlicensed ERP at 8.3 Ghz and 7.2Ghz? Doing some testing into patch antennas and don't want a visit from FCC.
or maybe I'll just stick the patch into a piece of RF foam adsorber in a cup.


https://www.youtube.com/watch?v=5ZtbCOpx8Sk

mpm
Guest

Tue Jan 08, 2019 5:45 am   



On Monday, January 7, 2019 at 9:28:23 PM UTC-5, sdy wrote:
Quote:
What is FCC limit on unlicensed ERP at 8.3 Ghz and 7.2Ghz? Doing some testing into patch antennas and don't want a visit from FCC.
or maybe I'll just stick the patch into a piece of RF foam adsorber in a cup.


Unlicensed low power rules are in Part 15.

See 15.209 for radiated emission limits:
https://www.ecfr.gov/cgi-bin/text-idx?SID=630d3235e9aac283abd2ea1158a8b7b5&mc=true&node=se47.1.15_1209&rgn=div8

Or, do whatever you want for now.
The FCC Enforcement Bureau field agents are mostly furloughed.

I'm kidding. Try to play nice. Smile

Jeff Liebermann
Guest

Tue Jan 08, 2019 7:45 am   



On Mon, 7 Jan 2019 18:28:19 -0800 (PST), sdy <sdeyoreo_at_hotmail.com>
wrote:

Quote:
What is FCC limit on unlicensed ERP at 8.3 Ghz and 7.2Ghz? Doing some testing into patch antennas and don't want a visit from FCC.
or maybe I'll just stick the patch into a piece of RF foam adsorber in a cup.


The FCC divides the problem into incidental radiators, unintentional
radiators, and intentional radiators. RF test equipment is an
intentional radiator.
<https://www.fcc.gov/oet/ea/rfdevice>

Radiation limits are not defined in watts, but rather as field
strength usually in uV/meter:
<https://www.ecfr.gov/cgi-bin/text-idx?SID=921d411f9771e11f4b58837a68788cd3&mc=true&node=se47.1.15_1209&rgn=div8>
Above 960MHz, the limit is 500 uV/meter measured at 3 meters.

You may find this handy for converting units of measure:
<http://www.learnbydestroying.com/jeffl/coverage/VZW-water-plant/Field%20Intensity%20and%20Power%20Density.pdf>

So much for the rules-n-regs. More practically, if you're doing
antenna testing, you should be making some effort to keep your signals
from causing problems. Testing outdoors, near an airport, on a
mountain top, in the middle of an antenna farm, with excessive power,
and for long time periods are all bad ideas. It might be useful to
determine the local users of 7.2 and 8.3GHz and avoid pointing your
antenna in their direction.
<https://transition.fcc.gov/oet/spectrum/table/fcctable.pdf>
Pg 45 and Pg 46. Looks like you're doing satcom. Find a location
where reflections won't bother your testing and make an effort to
control your TX power, direction, and test time. An RF anechoic
chamber might be overkill, but if precision measurements are required,
you'll probably need to rent a chamber, facility, or range.
Incidentally, I once did some testing in a forest, because the trees
were RF absorbers, not reflectors. Even so, I could see the effects
of branches waving around on the test equipment.

If you see satellites falling out of the sky, you're probably doing
something wrong. Good luck.


--
Jeff Liebermann jeffl_at_cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558


Guest

Tue Jan 08, 2019 8:45 pm   



Jeff Liebermann <jeffl_at_cruzio.com> wrote in
news:ljd83e1eprk4l5rvitie16cpg0qq06bkud_at_4ax.com:

> https://transition.fcc.gov/oet/spectrum/table/fcctable.pdf

Thanks for that. I have allways had the hi resolution image of the
spectrum tables, but this ius great!


Guest

Tue Jan 08, 2019 8:45 pm   



sdy <sdeyoreo_at_hotmail.com> wrote in
news:85e53b48-d9d7-4a4e-a683-db8a031dd43f_at_googlegroups.com:

Quote:
What is FCC limit on unlicensed ERP at 8.3 Ghz and 7.2Ghz? Doing
some testing into patch antennas and don't want a visit from FCC.
or maybe I'll just stick the patch into a piece of RF foam
adsorber in a cup.


No need to worry with the gov shut down. Hehehe Smile They are not
doing any monitoring. Just kidding.

However one must observe that most aftermarket antenna products
are meant to operate at the power levels allowed by regulatory laws.
So how easy would it be to burn up?

And if you do at some point want to operate legally, it might be
best to do so from the start.

There is an allocation table for the allowable bands, but I am not
sure where the source is to determine max radiated power limitations
for any given band.

Jeff Liebermann
Guest

Tue Jan 08, 2019 11:45 pm   



On Tue, 8 Jan 2019 19:14:32 +0000 (UTC),
DecadentLinuxUserNumeroUno_at_decadence.org wrote:

Quote:
Jeff Liebermann <jeffl_at_cruzio.com> wrote in
news:ljd83e1eprk4l5rvitie16cpg0qq06bkud_at_4ax.com:

https://transition.fcc.gov/oet/spectrum/table/fcctable.pdf

Thanks for that. I have allways had the hi resolution image of the
spectrum tables, but this ius great!


The above table is kept up to date by the FCC. The spectrum chart is
stuck at 2015 by the NTIA and is not being updated:
<https://www.ntia.doc.gov/page/2011/united-states-frequency-allocation-chart>
In some areas, like UHF TV channel reassignments, it's seriously out
of date. If you have a color printer and magnifying glass, it's only
952 KBytes big:
<https://www.ntia.doc.gov/files/ntia/publications/january_2016_spectrum_wall_chart.pdf>
I vaguely recall obtaining my wall chart from a magazine insert.


--
Jeff Liebermann jeffl_at_cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

DLUNU
Guest

Wed Jan 09, 2019 2:45 am   



Jeff Liebermann <jeffl_at_cruzio.com> wrote in
news:ea7a3etj4f7oef5huv5n42r9scj1apq4gn_at_4ax.com:

Quote:
If you have a color printer and magnifying glass, it's only
952 KBytes big:


I had / have a very hi res version.

use google images page and search for it. The hi res one is out
there.

DLUNU
Guest

Wed Jan 09, 2019 3:45 am   



Jeff Liebermann <jeffl_at_cruzio.com> wrote in
news:ea7a3etj4f7oef5huv5n42r9scj1apq4gn_at_4ax.com:

Quote:
On Tue, 8 Jan 2019 19:14:32 +0000 (UTC),
DecadentLinuxUserNumeroUno_at_decadence.org wrote:

Jeff Liebermann <jeffl_at_cruzio.com> wrote in
news:ljd83e1eprk4l5rvitie16cpg0qq06bkud_at_4ax.com:

https://transition.fcc.gov/oet/spectrum/table/fcctable.pdf

Thanks for that. I have allways had the hi resolution image of
the
spectrum tables, but this ius great!

The above table is kept up to date by the FCC. The spectrum chart
is stuck at 2015 by the NTIA and is not being updated:
https://www.ntia.doc.gov/page/2011/united-states-frequency-
allocati
on-chart> In some areas, like UHF TV channel reassignments, it's
seriously out of date. If you have a color printer and magnifying
glass, it's only 952 KBytes big:
https://www.ntia.doc.gov/files/ntia/publications/january_2016
_spect
rum_wall_chart.pdf> I vaguely recall obtaining my wall chart from a
magazine insert.



That link is to a pdf. So it zooms in just fine, and is high
resolution. It is also a January 2016 gov production.

That is the latest abd greatest as far as I can see.

Jeff Liebermann
Guest

Wed Jan 09, 2019 3:45 am   



On Wed, 9 Jan 2019 00:59:15 +0000 (UTC), DLUNU
<DecadentLinuxUserNumeroUno_at_DLU.org> wrote:

Quote:
Jeff Liebermann <jeffl_at_cruzio.com> wrote in
news:ea7a3etj4f7oef5huv5n42r9scj1apq4gn_at_4ax.com:

If you have a color printer and magnifying glass, it's only
952 KBytes big:

I had / have a very hi res version.
use google images page and search for it. The hi res one is out
there.


I tried but couldn't find anything in high res other than unauthorized
reprints:
<https://www.etsy.com/listing/539077255/poster-many-sizes-available-united>

42 x 63 inches for only $263 in paper. Also available in canvas.

--
Jeff Liebermann jeffl_at_cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Jasen Betts
Guest

Wed Jan 09, 2019 5:45 am   



On 2019-01-09, DLUNU <DecadentLinuxUserNumeroUno_at_DLU.org> wrote:
Quote:
Jeff Liebermann <jeffl_at_cruzio.com> wrote in
news:ea7a3etj4f7oef5huv5n42r9scj1apq4gn_at_4ax.com:

If you have a color printer and magnifying glass, it's only
952 KBytes big:

I had / have a very hi res version.


yeah there's a link on that page.

file size is 952kB


--
When I tried casting out nines I made a hash of it.

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