4 Rabbit 2000 Development Kit
1.4 CE Compliance
Equipment is generally divided into two classes.
These limits apply over the range of 30–230 MHz. The limits are 7 dB higher for frequen-
cies above 230 MHz. Although the test range goes to 1 GHz, the emissions from Rabbit-
based systems at frequencies above 300 MHz are generally well below background noise
levels.
The BL1800 single-board computer has been tested and was found to
be in conformity with the following applicable immunity and emission
standards. The BL1810 and BL1820 single-board computers are also
CE qualified as they are sub-versions of the BL1800 single-board com-
puter. Boards that are CE-compliant have the CE mark.
NOTE: Earlier versions of the BL1800 sold before 2002 that do not have the CE mark
are not CE-complaint.
Immunity
The BL1800 series of single-board computers meets the following EN55024/1998 immu-
nity standards.
• EN61000-4-3 (Radiated Immunity)
• EN61000-4-4 (EFT)
• EN61000-4-6 (Conducted Immunity)
Additional shielding or filtering may be required for a heavy industrial environment.
Emissions
The BL1800 series of single-board computers meets the following emission standards
with the Rabbit 2000 spectrum spreader turned on and set to the normal mode. The spec-
trum spreader is only available with Rev. C or higher of the Rabbit 2000 microprocessor.
This microprocessor is used in all BL1800 series boards that carry the CE mark.
• EN55022:1998 Class B
• FCC Part 15 Class B
In order for the BL1800s to meet these EN55022:1998 Class B standards, you must add
ferrite absorbers to the serial I/O cables used for RS-232 and RS-485 serial communica-
tion. Depending on your application, you may need to add ferrite absorbers to the digital
CLASS A CLASS B
Digital equipment meant for light industrial use Digital equipment meant for home use
Less restrictive emissions requirement:
less than 40 dB µV/m at 10 m
(40 dB relative to 1 µV/m) or 300 µV/m
More restrictive emissions requirement:
30 dB µV/m at 10 m or 100 µV/m
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