Instruction Manual

Forehead Sleep Recorder File No. DMR-SM902-4-25 Ver:A0
22 / 23 Copyright© Shenzhen BrainScience Bio-Info Technology Co., LTD
electromagnetic sites should be considered. If it is measured that the field strength of the
Forehead sleep recorder is higher than the applicable RF compliance level above, the
Forehead sleep recorder should be observed to verify that it can work normally. If normal
performance is not observed, supplementary measures may be necessary, such as reorienting
or repositioning the Forehead sleep recorder.
c) In the entire frequency range of 150kHz ~ 80MHz, the field strength should be lower than 3V
/ m
Table 10- Recommended separation distances
Recommended separation distances between portable and mobile RF communications equipment
and forehead sleep recorders
Forehead sleep recorders are intended for use in an electromagnetic environment where radio
frequency interference is controlled. Depending on the maximum rated output power of the
communication device, the purchaser or user can prevent electromagnetic interference by
maintaining the minimum distance between portable and mobile radio frequency communication
devices (transmitters) and forehead sleep recorders as recommended below.
Transmitter's rated
maximum output
power (W)
(Unit: m) Calculate the separation distance based on the frequency of
the transmitter
p.d 21=
)800~80(21 MHzMHzp.d =
)z5.2~800(32 GHMHzp.d =
0.01
Not applicable
0.12
0.23
0.1
Not applicable
0.38
0.73
1
Not applicable
1.2
2.3
10
Not applicable
3.8
73
100
Not applicable
12
23
For the transmitter's rated maximum output power not listed in the table above, the recommended
separation distance d, in meters (m), can be determined using the formula in the corresponding
transmitter frequency column, where p is provided by the transmitter manufacturer Maximum
output rated power in watts (w).
Note 1: At 80MHz and 800MHz, the higher frequency range formula is used.
Note 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected
by absorption and reflection from buildings, objects and Population.
14. FCC Regulatory Compliance statement
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful interference,
and (2) this device must accept any interference received, including interference that may cause
undesired operation.
Note: This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates, uses
and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no