Table of Contents
Advertisement
TABLE 4
RECOMMENDED SEPARATION DISTANCES BETWEEN PORTABLE AND MOBILE RF
The system is intended for use in an electromagnetic environment in which radiated RF
disturbance are controlled. The customer or the user of system can help prevent electromagnetic
interference by maintaining a minimum distance between portable and mobile RF communication
equipment (transmitters) and system as recommended below, according to the maximum output
power of the communication equipment.
Rated Maximum
Output power of
Transmitter
(W)
0.01
0.1
1
10
100
For transmitters at a maximum output power not listed above, the recommended separation
distanced in meters (m) can be determined using the formula 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.
If system image distortion occurs, it may be necessary to position system further from sources of
conducted RF noise or to install external power source filter to minimize RF noise to an acceptable
level.
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 human body.
Cable sample
Name
No.
1
Power Cord
2
ECG cable
3
Foot-switch control cable
4
Probe cable
Federal Communications Commission (FCC) Statement
The wireless module 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
COMMUNICATION DEVICE AND SYSTEM
Separation Distance According to Frequency of Transmitter
150kHz -80MHz
d＝1.2
P
0.12
0.38
1.2
3.8
12
Cable length
(m)
80MHz-800MHz
d＝1.2
P
0.12
0.38
1.2
3.8
12
Shielding or not
(m)
2.3
No
4.0
Yes
2.9
Yes
2.4
Yes
EMC Guidance and Manufacturer's Declaration 15-5
800MHz-2.5GHz
d＝2.3
P
0.23
0.73
2.3
7.3
23
Remark
/
/
/
Longest cable
Advertisement
Table of Contents
