尺寸:100*70mm
材质:105G铜版纸/黑白印刷
骑马钉装订。
Rated maximum output
power of transmitter W
0.01
0.1
1
10
100
/
/
/
/
/
0.12
0.38
1.2
3.8
12
0.23
0.73
2.3
7.3
23
Separation distance according to frequency of
transmitter M
150 kHz to
80 MHz
80 MHz to
800 MHz
800 MHz to
2,5 GHz
Recommended separation distances between portable and mobile RF
communications equipment and the JT-E020
The “JT-E020” is intended for use in an electromagnetic environment in which
radiated RF disturbances are controlled. The customer or the user of the JT-E020
can help prevent electromagnetic interference by maintaining a minimum distance
between portable and mobile RF communications equipment (transmitters) and
the “JT-E020” as recommended below, according to the maximum output power
of the communications equipment.
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 “JT-E020”
is used exceeds the applicable RF compliance level above,
the JT-E020 should be observed to verify normal
operation. If abnormal performance is observed, additional
measures may be necessary, such as reorienting or relocating
the “JT-E020”.
b
Over the frequency range 150 kHz to 80 MHz, field strengths
should be less than 3 V/m.
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.
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.
Product technical requirement number:
Use period: 3 years
Manual version: V1.0
Manual preparation date: February 25, 2020
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