Measures To Prevent Electromagnetic Interferences - Schiller FRED easy User Manual

7 Maintenance
7.5 Trouble Shooting
"Non-ionic electromagnetic radiation"
Page 80
7.5.4

Measures to prevent electromagnetic interferences

The user can help avoid electromagnetic disturbances by keeping the minimum dis-
tance between portable and mobile HF telecommunication devices (transmitters) and
the FRED easy®. The distance depends on the output performance of the communi-
cation device as indicated below.
Radio telephone (microcellular) CT1+, CT2, CT3
Cordless DECT telephone, WLAN, UMTS phone
Mobile phone USA
Mobile phone
- GSM900,
- GSM850, NMT900, DCS 1800
Walkie-talkie (rescue service, police, fire bri-
gade, service)
Mobile telephone system (rescue service, po-
lice, fire brigade)
It can be deducted from the table that portable HF telecommunication devices must
not be used within a radius of 3 m from the FRED easy® and its cables.
Further measures to prevent electromagnetic interferences:
The user can take the following measures to prevent electromagnetic interferences:
• Increase distance to the source of interference
• Turn the device to change the angle of radiation.
• Only use original accessories.
For more detailed information, please refer to page
If the devices are used in the vicinity of power networks operating at a frequency of 16.7
Hz (railway systems in some countries), the 16.7 Hz filter must be activated via the con-
figuration software before use. The filter is by default activated.
HF source Transmitter fre- Power P
quency [W]
[MHz]
885-887 0.010
1880-2500 0.25
850/1900 0.6
900 2
850,900,1800 1
81-470 5
81-470 100
85.
FRED easy
Distance d
[m]
0.23
1.17
1.8
3.3
2.3
2.6
11.7