Enraf Nonius Eltrac 471 User Manual

21
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 meters (m).
Field strengths from fixed 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 reflection from structures, objects and people.
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 Eltrac471 is used exceeds the applicable RF compliance level above, the Eltrac471 should be
observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as re-orienting or relocating the Eltrac471.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
RECOMMENDED SEPARATI
ON DISTANCES BETWEEN
PORTABLE AND MOBILE
RF
COMMUNICATIONS EQUIPMENT AND THE ELTRAC471
The Eltrac471 is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The
customer or the user of the Eltrac471 can help prevent electromagnetic interference by maintaining a minimum distance between
portable and mobile RF communications equipment (transmitters) and the Eltrac471 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 = 1,17√P
80 MHz tot800
MHz
d = 1,17√P
800 MHz to 2,5 GHz
d = 2,33√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
3.70
3.70
7.37
100
11.70
11.70
23.33
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in metres (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.

Enraf Nonius Eltrac 471 Specifications

General

Brand	Enraf Nonius
Model	Eltrac 471
Category	Medical Equipment
Language	English