Ublox MPCI-L2 series, Руководство по системной интеграции

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TOBY-L2 and MPCI-L2 series - System Integration Manual
UBX-13004618 - R07 Advance Information Design-in
Page 128 of 158
2.15.2 ESD immunity test of TOBY-L2 and MPCI-L2 series reference designs
Although EMC / ESD certification is required for customized devices integrating TOBY-L2 and MPCI-L2 series
modules for R&TTED and European Conformance CE mark, EMC certification (including ESD immunity) has been
successfully performed on TOBY-L2 and MPCI-L2 series modules reference design according to European Norms
summarized in Table 47.
The EMC / ESD approved u-blox reference designs consist of a TOBY-L2 and MPCI-L2 series module installed
onto a motherboard which provides supply interface, SIM card and communication port. External LTE/3G/2G
antennas are connected to the provided connectors.
Since external antennas are used, the antenna port can be separated from the enclosure port. The reference
design is not enclosed in a box so that the enclosure port is not identified with physical surfaces. Therefore,
some test cases cannot be applied. Only the antenna port is identified as accessible for direct ESD exposure.
Table 48 reports the u-blox TOBY-L2 and MPCI-L2 series reference designs ESD immunity test results, according
to test requirements stated in the
CENELEC EN 61000-4-2 [22], ETSI EN 301 489-1 [23], ETSI EN 301 489-7 [24]
and ETSI EN 301 489-24 [25].
Category Application Immunity Level Remarks
Contact Discharge
to coupling planes
(indirect contact discharge) Enclosure +4 kV / -4 kV
Contact Discharges
to conducted surfaces
(direct contact discharge) Enclosure port Not Applicable Test not applicable to u-blox reference design because it
does not provide enclosure surface.
The test is applicable only to equipment providing
conductive enclosure surface.
Antenna ports +4 kV / -4 kV Test applicable to u-blox reference design because it
provides antennas with conductive & insulating surfaces.
The test is applicable only to equipment providing
antennas with conductive surface.
Air Discharge
at insulating surfaces Enclosure port Not Applicable Test not applicable to the u-blox reference design
because it does not provide an enclosure surface.
The test is applicable only to equipment providing
insulating enclosure surface.
Antenna ports +8 kV / -8 kV Test applicable to u-blox reference design because it
provides antennas with conductive & insulating surfaces.
The test is applicable only to equipment providing
antennas with insulating surface.
Table 48: Enclosure ESD immunity level of u-blox TOBY-L2 and MPCI-L2 series modules reference designs
TOBY-L2 and MPCI-L2 reference design implement all the ESD precautions described in section 2.15.3.
2.15.3 ESD application circuits
The application circuits described in this section are recommended and should be implemented in the device
integrating TOBY-L2 and MPCI-L2 series modules, according to the application device classification (see
ETSI EN
301 489-1 [23]), to satisfy the requirements for ESD immunity test summarized in Table 47.
Antenna interface
The ANT1 and ANT2 ports of TOBY-L2 and MPCI-L2 series modules provide ESD immunity up to ±4 kV for
direct Contact Discharge and up to ±8 kV for Air Discharge: no further precaution to ESD immunity test is
needed, as implemented in the EMC / ESD approved reference design of TOBY-L2 and MPCI-L2 series modules.