User Manual

Table Of Contents

AXELL MBF MULI-BAND FIBRE REPEATER

PRODUCT DESCRIPTION AND USER’S MANUAL

Radiation Hazard

This equipment emits radio frequency radiation and can, if used the wrong way, be hazardous for

personnel. Here follows an example of the power densities from an intentional radiator.

For radiation from a general antenna, the power density (S) at some distance is according to the well-

known formula:

For the repeaters described in this handbook the maximum output powers are 5 W for 900 / 1800

MHz and 10 W 2100 MHz. The corresponding power densities using a + 10 dBi antenna as an

example at 1 m will be 4 W/ m² for the 900/1800 MHz output and 8 W/ m² for 2100 MHZ output.

1 m distance from the antenna at these frequencies is used as a minimum distance for practical

exposure of the public. It is also difficult to have a developed EMF at distances closer than 1 m.

According to R&TTE Health requirements referring to the 1999 Council recommendation, the

reference level for the frequency range of 400 – 2000 MHz is f/ 200 W/ m² ( f in MHz ) and above 2

GHz, 10 W/ m².

For the repeaters in this manual the levels are:

GSM 900 (960 MHz) = 4.8 W/m²

DC 1800 (1880 MHz) = 9.4 W/m²

UMTS 2100 (2170 MHz) = 10 W/m².

This means that an installation with a +10 dBi antenna does not exceed the basic restriction levels

according to the recommendations.

For frequencies between 400 and 2000 MHz the ICNIRP occupational guideline level of exposure is f

/40 W/m² (f in MHz), and 50 W/m² for frequencies above 2 GHz.

The ICNIRP levels for the frequency above bands:

GSM 900 (960 MHz) = 24 W/m²

DC 1800 (1880 MHz) = 47 W/m²

UMTS 2100 (2170 MHz) = 50 W/m².

There are no radiation health issues with the above + 10 dBi antenna installations. However, the

repeater is marked with radiation hazard warning.