Beurer BM 90 – страница 6

a

Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land

mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast cannot be predicted theoretically

with accuracy. To assess the electromagnetic environment due to fixed RF transmitters, an electromagnetic

site survey should be considered. If the measured field strength in the location in which the BM90 is used

exceeds the applicable RF compliance level above, the BM90 should be observed to verify normal operation.

If abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating

the BM90.

b

Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.

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Table 4

For ME EQUIPMENT or ME SYSTEM that are not LIFE-SUPPORTING

Recommended separation distances between portable and mobile RF

communications equipment and the BM90.

The BM90 is intended for use in an electromagnetic environment in which radiated RF disturbances are con-

trolled. The customer or the user of the BM90 can help prevent electromagnetic interference by maintaining a

minimum distance between portable and mobile RF communications equipment (transmitters) and the BM90

as recommended below, according to the maximum output power of the communications equipment.

Rated maximum output

Separation distance according to frequency of transmitter

power of transmitter

m

W

150 kHz to 80 MHz

80 MHz to 800 MHz

800 MHz to 2,5 GHz

d = 1.167 P

d = 1.167 P

d = 2.333 P

0,01 0.167 0.167 0.233

0,1 0.369 0.369 0.738

1 1.167 1.167 2.333

10 3.690 3.690 7.388

100 11.67 11.67 23.330

For transmitters rated at a maximum output power not listed above, the recommended separation distance d

in meters (m) can be estimated using the equation applicable to the frequency of the transmitter, where P is

the maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer.

NOTE 1 At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.

NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorpti-

on and reflection from structures, objects and people.

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752.995_0912 Irrtum und Änderungen vorbehalten

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