WARNING!
THIS EQUIPMENT IF HANDLED IMPROPERLY WILL
POSE A RADIATION HAZARD
Microwave Radio Communications Inc. in compliance with RF exposure limits set forth in OET
Bulletin 65, Edition 97-01 utilizes this page for the intent of expressing our concerns to the user
of this equipment STRATA 2 GHz Transmitter Unit (TXU) that there exists a radiation hazard
with improper use of this equipment.
The STRATA transmitter with rated 2-WATT RF Power output is designed as an intentional
radiator, as such, this device has been designed to produce and emit radiation into an isotropic
antenna for the purpose of delivering a digitally modulated signal to an appropriate receiving
device.
Due to the low output power of this device in and of itself it poses no such hazard until connected
properly and securely to a properly matched antenna. Therefore it is necessary for the equipment
operator to be made aware of the safe operating parameters of this device. Below is a chart based
on the use of a 5dBi Omni directional antenna. The radiation limits at a distance of below 20cm
exceeds the allowable safe exposure limits. Beyond a distance of 20 cm you will notice that the
usable antenna gain (expressed in dBi) increases logarithmically with distance spherically from
the radiator.
In the case of an antenna with a concentrated beam such as a parabolic antenna, the caution to
exposure levels would be relative to antenna gain and distance only with in the radiation pattern
of the parabola. Notwithstanding, radiation exposure due to antenna inefficiency (side lobe and
front to back emission) although severely reduced should be calculated. A case-by-case analysis
of each antenna that is to be utilized with this device should be investigated.
The intent of this document is to bring awareness to the operator of this device the potential for
hazardous RF exposure limits if improperly used. Microwave Radio Communications Inc.
cautions the user to contact our customer service department to receive exposure data or the
antenna manufacturer to receive the radiation pattern of the antenna if not purchased through
Microwave Radio Communications Inc.
101 Billerica Ave., Bldg. 6
N. Billerica, MA 01862-1256
Tel: (978) 671-5700
Fax: (978) 671-5800
