Wireless Power calculation

AP output = 100mW

Assume loss via connector/cables = -6dB

Anntenna (Omni) = 15dBi

Will this configuration exceed FCC regulation (1W?) ?


Thanks


ToInBox

ToInBox <(E-Mail Removed)> wrote:
> AP output = 100mW
>
> Assume loss via connector/cables = -6dB
>
> Anntenna (Omni) = 15dBi
>
> Will this configuration exceed FCC regulation (1W?) ?

3db is half power.
6db may be a bit much for most cables unless very long.

Anyway, look at the closest binary magnitude.
128 is around 100, and is 2^7.
So, you'r at about 7*3db = 21db, or probably
around 20dbm.
20dbm -6 +15 = 29dbm = 2^(29/3) = a bit under 30dbm (1024mw).
Probably, but it's on the edge.

--
http://inquisitor.i.am/ | private.php?do=newpm&u= | Ian Stirling.
---------------------------+-------------------------+--------------------------
Get off a shot FAST, this upsets him long enough to let you make your
second shot perfect. -- Robert A Heinlein.

"ToInBox" <(E-Mail Removed)> wrote in message
news:Pqejb.890$(E-Mail Removed)...
> AP output = 100mW
>
> Assume loss via connector/cables = -6dB
>
> Anntenna (Omni) = 15dBi
>
> Will this configuration exceed FCC regulation (1W?) ?
>
>
> Thanks
>
>
> ToInBox
>

100mW = 20dBm
20 + 15 - 6 = 29 dBm effective isotropic radiated power. The FCC limit is
36 dBm EIRP unless the link is for fixed, point to point service (in which
case 27 dBm (500mW) is allowed into a 15 dBi antenna (30dBm - (15 - 6)/3).
If your cable and connector losses are really 6dB, then the full upper limit
of 1 Watt would be allowed for a fixed, point-to-point link.

Also see Sec. 15.204 External radio frequency power amplifiers and antenna
modifications:

(a) Except as otherwise described in paragraph (b) of this
section, no person shall use, manufacture, sell or lease, offer
for sale or lease (including advertising for sale or lease), or
import, ship, or distribute for the purpose of selling or leasing,
any external radio frequency power amplifier or amplifier kit
intended for use with a Part 15 intentional radiator.
(b) A transmission system consisting of an intentional radiator,
an external radio frequency power amplifier, and an antenna, may
be authorized, marketed and used under this part. However, when
a transmission system is authorized as a system, it must always be
marketed as a complete system and must always be used in the
configuration in which it was authorized. An external radio
frequency power amplifier shall be marketed only in the system
configuration with which the amplifier is authorized and shall
not be marketed as a separate product.
(c) Only the antenna with which an intentional radiator is
authorized may be used with the intentional radiator.
http://makeashorterlink.com/?G48721936