STACK
WiFi Recording System
ST542090-002
8
WiFi Antenna Safe operating distance
RF safety is always a concern when working around microwave radiation. The FCC has set
safety standards that are meant to guard against potentially harmful RF fields. In a "controlled"
environment (where the people near the antenna know of the hazards), the FCC limit is 5.0
mw/cm
2
. In an "uncontrolled" environment (where the people near the antenna are unaware of
the hazard), the FCC limit is 1.0 mw/cm
2
.
IMPORTANT
Do NOT touch the antenna when the WiFi is operating. Based on the FCC
"uncontrolled" environment ‘ limit: Keep a Minimum safe distance of 25mm (1”) from the
antenna.
Other Pit lane WiFi systems
IMPORTANT
The use of WiFi systems may be
restricted
or
prohibited
in accordance with the Regulations
of the Championship. Please refer to the Regulations.
WiFi Channel Allocation.
WiFi channels are allocated a channel number from 1 to 14 in Europe & 1 to 11 in the U.S.A.
The STACK system is allocated to channel 6. (default).
However each WiFi network occupies the 2 channels either side of the chosen channel, 5 in
total, as shown in the diagram below.
IMPORTANT
I
n practice the best use of ALL WiFi channels is to operate on channels 1,
6 and 11, ONLY. As follows:-
For adjacent pit garages use the WiFi Channel sequence 1, 6 ,11, 1, 6, 11 … etc. to minimise
the interference between networks.
