Instruction Manual

34
Recommended isolation distance between portable or
mobile RF communication equipment and this product
This STEMO500 stethoscope is expected to be used in an electromagnetic
environment where RF radiation disturbances are controlled. According to the
maximum output power of the communication equipment, the purchaser or
user can prevent electromagnetic interference by maintaining a minimum
distance between the portable or mobile RF communication equipment
(transmitter) and the product.
Maximum rated
output power of
transmitter
W
Isolation distance corresponding to different
transmitter frequencies / m
150 kHz~ 80
MHz
d = 1.2
√
𝑃
80 MHz~
800MHz
d = 1.2
√
𝑃
800 MHz~
2.5GHz
d =2.3
√
𝑃
0.01
0.12
0.12
0.23
0.1
0.38
0.38
0.73
1
1.2
1.2
2.3
10
3.8
3.8
7.3
100
12
12
23
For the maximum rated output power of the transmitter not listed in the above
table, the recommended isolation distance d, in meters (m), can be
determined by the formula in the corresponding transmitter frequency
column, where P is the maximum rated output power of the transmitter
provided by manufacturer, in watts (W).
Note 1: At central frequencies of 80 MHz and 800 MHz, the formula for higher
frequency band shall be used.
Note 2: These guidelines may not be suitable for all situations. Electromagnetic
propagation is affected by absorption and reflection from buildings, objects,
and human bodies.