10 • Notes on electromagnetic compatibility (EMC)
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80113-401_V24023
2023-05
The cables / cords used on the unit must not exceed the lengths specified below.
Note: These guidelines may not apply in all cases. Electromagnetic propagation is affected by absorption and reflection from
structures, objects and people.
a)
The ISM bands between 150 kHz and 80 MHz are 6.765 MHz to 6.795 MHz, 13.553 MHz to 13.567 MHz, 26.957 MHz to
27.283
MHz and 40.66 MHz to 40.7 MHz.
b)
The field strengths of fixed transmitters, such as base stations for radio (cellular/cordless) telephones and terrestrial radio
units, amateur radio stations, AM and FM radio and TV channels cannot be predicted theoretically with accuracy. To assess
the electromagnetic environment with regard to fixed transmitters, a site inspection should be considered. If the field
strength measured at the site where the unit is used exceeds the abovementioned compliance level, the unit must be moni
-
tored to ensure it is functioning properly. In the event of any unusual operating behavior, additional measures may be
required, such as changing the orientation or location of the unit.
Electromagnetic immunity against high-frequency wireless communication units as per IEC 61000-4-3
Frequency band (MHz) Test frequency (MHz) Modulation Compliance level (V/m)
380 - 390 385 Pulse
a)
(18 Hz) 27
430 - 470 450 FM ± 5 kHz deviation or
pulse
a)
(18 Hz)
28
704 - 778 710, 745, 780 Pulse
a)
(217 Hz) 9
800 - 960 810, 870, 930 Pulse
a)
(18 Hz) 28
1700 - 1990 1720, 1845, 1970 Pulse
a)
(217 Hz) 28
2400 - 2570 2450 Pulse
a)
(217 Hz) 28
5100 - 5800 5240, 5500, 5785 Pulse
a)
(217 Hz) 9
Note: A minimum safety distance of 30 cm should be maintained between the unit and portable HF telecommunications
units that transmits in the stated frequency band. This includes mobile phones, WLAN and RFID, and Bluetooth units. Failure
to comply may lead to a reduction in the unit’s performance features.
Interference may occur in the vicinity of units marked with the following symbol.
a) The pulse modulation is defined as a square-wave signal with a 50% duty factor.
Guidance and manufacturer's declaration - electromagnetic immunity
EMC-relevant accessories
a)
Name Maximum cable length
Power cord 5 m
Grounding cable (POAG) 10 m
Footswitch cable 5 m
a) EMC-relevant accessories refers to the cable specified. The cable can affect the unit’s electromagnetic interference or the
electromagnetic immunity of the unit.
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