BT-740 Operation manual
120
P/N : 740-ENG-OPM-EUR-D03
Bistos Co., Ltd.
2018.05
The BT-740 is intended for use in the electromagnetic environment specified below.
The customer or the user of the BT-740 should assure that it is used in such an environment.
Immunity test
IEC 60601 test level
Compliance level
Conducted RF
IEC 61000-4-6:2009
3 Vrms
150 kHz to 80 MHz
3 Vrms
Radiated RF
IEC 61000-4-3
3 V/m
80 MHz to 2.5 GHz
3 V/m
Electromagnetic environment - guidance
Portable mobile RF communications equipment should be used no closer to any part of the
BT-550, including cables, than the recommended separation distance calculated from the
equation applicable to the frequency of the transmitter.
Recommended separation distance
d
－
1.2
�𝑝𝑝
(
d
－
3.5
�𝑝𝑝
)
d
－
1.2
�𝑝𝑝
(Resp:
d
－
3.5
�𝑝𝑝
) 80 to 800MHz
d
－
1.2
�𝑝𝑝
800M to 2.5GHz
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 deter-mined 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 BT-740 is used exceeds
the applicable RF compliance level above, the BT-550 should be observed to verify normal
operation. If abnormal performance is observed, additional measures may be necessary, such
as re-orienting or relocating the BT-740.
b
Over the frequency range 150 kHz to 80MHz, field strengths should be less than 3 V/m
.
