User's Manual

32 (34)

analyzer.

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

Recommended separation distances between portable and mobile RF communications

equipment and the EMMA gas analyzer

The EMMA gas analyzer is intended for use in an electromagnetic environment in which radiated RF

disturbances are controlled. The customer or the user of the EMMA gas analyzer can help prevent

electromagnetic interference by maintaining a minimum distance between portable and mobile RF

communications equipment (transmitters) and the EMMA gas analyzer as recommended below,

according to the maximum output power of the communications equipment.

Rated maximum

output power of

transmitter

[W]

Separation distance according to frequency of transmitter

[m]

150 kHz to 80 MHz

Pd 17,1

80 MHz to 800 MHz

Pd 0,18

800 MHz to 2.7 GHz

Pd 0,35

0,01 0,12 0,02 0,04

0,1 0,37 0,06 0,11

1 1,17 0,18 0,35

10 3,70 0,57 1,11

100 11,70 1,80 3,50

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

absorption and reflection from structures, objects and people.

Note 3: In the frequency band 80 MHz to 2.7 GHz the separation distance is based on the higher field

strength 20 V/m 80%AM@1kHz.

WARNING! Measurements can be affected by mobile phones and RF communications equipment. It

should be assured that EMMA is used in the electromagnetic environment specified.