Global Microwave Systems Inc. VMT-F2 Manual De Usuario
100-M0169X1
11-15-11
6 of 24
www.cobham.com/gms
2.0 Important Warning and General Safety Information
The following information is presented to the operator to ensure awareness of potential harmful RF
(radio frequency) exposure and general hazards. With regards to potential harmful RF
electromagnetic fields the text below is only a brief summary highlighting the possible risks and how to
minimize exposure. The summary is based on OET Bulletin 65 “Evaluating Compliance with FCC
Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields”
(radio frequency) exposure and general hazards. With regards to potential harmful RF
electromagnetic fields the text below is only a brief summary highlighting the possible risks and how to
minimize exposure. The summary is based on OET Bulletin 65 “Evaluating Compliance with FCC
Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields”
(1)
. The user should
carefully read and comprehend the following before operating the equipment. For additional in depth
information refer to OET Bulletin 65.
information refer to OET Bulletin 65.
1.
FCC has set guidelines
(1)
for evaluating exposure to RF emissions that the user must be aware
of when operating the VMT (VETA miniature transmitter) microwave transmitter. The
maximum power density allowed at 2412-2472MHz is 5mW/cm
maximum power density allowed at 2412-2472MHz is 5mW/cm
2
for occupational/controlled
exposure* and 1mW/cm
2
for general population/uncontrolled exposure**. These are the limits
for maximum permissible exposure (MPE) as called out in the FCC guidelines (for the above
mentioned frequencies).
mentioned frequencies).
2.
Exposure is based upon the average time spent within the RF field with a given intensity (field
units in mW/cm
2
). Hence it may be controlled (or at least minimized) by observing the safe
distances and time exposed. Safe distances are calculated from equations predicting RF Fields
(3)
.
3.
The transmitter is a mobile device, is rated at 0.1W (+20dBm) RF power and is capable of
harmful radiation if safe operating practices are not observed.
*”Occupational/controlled exposure limits apply to situations in which persons are exposed as a
consequence of their employment and in which those persons who are exposed have been made
fully aware of the potential for exposure and can exercise control over their exposure.
Occupational/controlled exposure limits also apply where exposure is of a transient nature as a
result of incidental passage through a location where exposure levels may be above general
population/uncontrolled limits (see below), as long as the exposed person has been made fully
aware of the potential for exposure and can exercise control over his or her exposure by leaving the
area or by some other appropriate means……..”
consequence of their employment and in which those persons who are exposed have been made
fully aware of the potential for exposure and can exercise control over their exposure.
Occupational/controlled exposure limits also apply where exposure is of a transient nature as a
result of incidental passage through a location where exposure levels may be above general
population/uncontrolled limits (see below), as long as the exposed person has been made fully
aware of the potential for exposure and can exercise control over his or her exposure by leaving the
area or by some other appropriate means……..”
(2)
** “General population/uncontrolled exposure limits apply to situations in which the general public
may be exposed or in which persons who are exposed as a consequence of their employment may
not be made fully aware of the potential for exposure or cannot exercise control over their
exposure. Therefore, members of the general public would always be considered under this
category when exposure is not employment-related, for example, in the case of a
telecommunications tower that exposes persons in a nearby residential area.“
may be exposed or in which persons who are exposed as a consequence of their employment may
not be made fully aware of the potential for exposure or cannot exercise control over their
exposure. Therefore, members of the general public would always be considered under this
category when exposure is not employment-related, for example, in the case of a
telecommunications tower that exposes persons in a nearby residential area.“
(2)
(1)
OET Bulletin 65, Apendix A Table 1 Limits for MPE
http://www.fcc.gov/Bureaus/Engineering_Technology/Documents/bulletins/oet65/oet65.pdf
(2)
OET Bulletin 65, page 9, definitions of types of exposure
http://www.fcc.gov/Bureaus/Engineering_Technology/Documents/bulletins/oet65/oet65.pdf
(3)
OET Bulletin 65, page 19, Equations for predicting RF Fields
http://www.fcc.gov/Bureaus/Engineering_Technology/Documents/bulletins/oet65/oet65.pdf