Welch Allyn RetinaVue 700, Инструкция по применению

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Electromagnetic immunity
b
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 device
The device is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled. The customer or user of the device can help prevent electromagnetic interference by maintaining a
minimum distance between portable and mobile RF communications equipment (transmitters) and the device
as recommended below, according to the maximum output power of the communications equipment.
Separation distance according to frequency of transmitter (m)
Rated max. output
power of
transmitter (W)
150 kHz to 80 MHz
outside ISM bands
150 kHz to 80 MHz
in ISM bands
80 MHz to 800 MHz 800 MHz to 2.7 GHz
0.01 0.12 0.20 0.12 0.23
0.1 0.37 0.63 0.38 0.73
1 1.17 2.00 1.20 2.30
10 3.69 6.32 3.79 7.27
100 11.67 20.00 12.00 23.00
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.
Test specifications for enclosure port immunity to RF wireless communications equipment
Test frequency
(MHz)
Band
a
MHz
Service
a
Modulation
b
Maximum
power (W)
Distance
(m)
Immunity
test level
(V/m)
385 380 - 390 TETRA 400 Pulse
modulation
b
18 Hz
1.8 0.3 27
450 430 - 470 GMRS 460,
FRS 460
FM
c
±5 kHz
deviation
1 kHz sine
2 0.3 28
710 704 - 787 LTE band 13, 17 Pulse
modulation
b
0.2 0.3 9
146 General compliance and standards Welch Allyn RetinaVue™ 700 Imager