Integration Manual

Table Of Contents
LISA-U2 series - System Integration Manual
UBX-13001118 - R25 Design-In Page 140 of 182
2.5.2 ESD immunity test of u-blox LISA-U2 series reference designs
Although Electromagnetic Compatibility (EMC) certification is required for customized devices
integrating
LISA-U2 modules for RED and European Conformance CE mark, EMC certification (including ESD
immunity) has been successfully performed on the LISA-U2 series modules reference designs
according to the CENELEC EN 61000-4-2 [11], ETSI EN 301 489-1 [12], ETSI EN 301 489-52 [13]
European Norms.
The EMC / ESD approved u-blox reference designs consist of a LISA-U2 series module soldered onto
a motherboard which provides the supply interface, SIM card, headset, and communication port. An
external antenna is connected to an SMA connector provided on the motherboard for the main Tx/Rx
antenna. An additional external antenna is connected to an additional SMA connector provided on the
motherboard for the Rx diversity antenna of the LISA-U230 modules.
Since an external antenna is 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.
The u-blox LISA-U2 series reference designs implement all the ESD precautions described in
section 2.5.3.
u-blox LISA-U2 series reference designs ESD immunity test results are detailed in Table 52, according
to test requirements stated in CENELEC EN 61000-4-2 [11], EN 301 489-1 [12], EN 301 489-52 [13].
Category
Application
Ref. Design
Immunity Level
Remarks
Contact Discharge
to coupling planes
(indirect contact
discharge)
Enclosure
All
+4 kV / -4 kV
Contact Discharges
to conducted surfaces
(direct contact
discharge)
Enclosure port
All
Not Applicable
Test not applicable to u-blox reference design
because it does not provide enclosure surface.
The test is applicable only to equipments providing
conductive enclosure surface.
Main Antenna
port
All
+4 kV / -4 kV
Test applicable to u-blox reference design because
it provides antenna with conductive & insulating
surfaces. The test is applicable only to equipments
providing antenna with conductive surface.
Rx Div Antenna
port
LISA-U230
+4 kV / -4 kV
Test applicable to u-blox reference design because
it provides antenna with conductive & insulating
surfaces. The test is applicable only to equipments
providing antenna with conductive surface.
Air Discharge
at insulating surfaces
Enclosure port
All
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 equipments providing
insulating enclosure surface.
Main Antenna
port
All
+8 kV / -8 kV
Test applicable to u-blox reference design because
it provides antenna with conductive & insulating
surfaces. The test is applicable only to equipments
providing antenna with insulating surface.
Rx Div Antenna
port
LISA-U230
+8 kV / -8 kV
Test applicable to u-blox reference design because
it provides antenna with conductive & insulating
surfaces. The test is applicable only to equipments
providing antenna with insulating surface.
Table 52: Enclosure ESD immunity level of u-blox LISA-U2 series modules reference designs