LISA-U2 series - System Integration Manual
UBX-13001118 - R19
Early Production Information
Design-In
Page 136 of 175
2.5.2
ESD immunity test of u-blox LISA-U2 series reference designs
Although Electro-Magnetic Compatibility (EMC) certification is required for customized devices integrating
LISA-U2 modules for R&TTED and European Conformance CE mark, EMC certification (including ESD immunity)
has been successfully performed on LISA-U2 series modules reference designs according to the
CENELEC EN
61000-4-2
ETSI EN 301 489-1
ETSI EN 301 489-7
[13] and
ETSI EN 301 489-24
[14] European Norms.
The EMC / ESD approved u-blox reference designs consist of a LISA-U2 series module soldered onto a
motherboard which provides 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 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 indentified 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 reported in the Table 52, according to test
requirements stated in the
CENELEC EN 61000-4-2
ETSI EN 301 489-1
ETSI EN 301 489-7
[13] and
ETSI EN 301 489-24
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