CAO Group Precise LTM - Electromagnetic Emissions Declaration; RF Separation Distance Guidance

17
Guidance and Manufacturer’s Declaration - electromagnetic emissions
The Precise® LTM laser is intended for use in the electromagnetic environment specied below.
The customer or the user of the Precise LTM laser should assure that it is used in such an environment.
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
3 Vrms
150 kHz to 80 MHz
3 V/m
80 MHz to 2,5 GHz
3 Vrms 3 V/m Portable and mobile RF communications equipment
should be used no closer to any part of the Precise
LTM laser, including cables, than the recommended
separation distance calculated from the equation
applicable to the frequency of the transmitter.
Recommended separation distance
d = [3.5/V1] √ P
d = [3.5/E1] √ P 80 MHz to 800MHz
d = [7/E1] √ P 800 MHz to 2.5 GHz
where P is the maximum output power rating of the
transmitter in watts (W) according to the transmitter
manufacturer and d is the recommended
separation distance in metres (m). Field strengths
from xed RF transmitters, as determined by an
electromagnetic site
survey
a
, should be less than the
compliance level in each
frequency range.
b
Interference
may occur in the vicinity of
equipment marked with the
following symbol:
NOTE 1: At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reection
from structures, objects and people.
a
Field strengths from xed transmitters, such as base stations for radio (Bluetooth® 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 xed RF transmitters, an electromagnetic site survey should be considered. If the
measured eld strength in the location in which the Precise® LTM laser is used exceeds the applicable RF compliance level above,
the Precise LTM laser should be observed to verify normal operation. If abnormal performance is observed, additional measures
may be necessary, such as reorienting or relocating the Precise® LTM.
b
Over the frequency range 150 kHz to 80 MHz, eld strengths should be less than 3 V/m.
Recommended separation distances between
portable and mobile RF communications equipment and the Precise® LTM
The Precise® LTM laser is intended for use in an electromagnetic environment in which radiated RF disturbances
are controlled. The customer or the user of the Precise LTM laser can help prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the
Precise LTM laser 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
d = [3.5/V1] √ P
80 MHz to 800 MHz
d = [3.5/E1] √ P
800 MHz to 2.5 GHz
d = [7/E1] √ P
0.01 0.12 0.12 0.23
0.1 0.37 0.37 0.74
1 1.17 1.17 2.33
10 3.69 3.69 7.39
100 11.67 11.67 23.33
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 reection
from structures, objects and people.