SARA-G3 series - System Integration Manual
UBX-13000995 - R06
Objective Specification
Design-in
Page 158 of 218
The EMC / ESD approved u-blox reference designs consist of a SARA-G3 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 GSM antenna.
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.
u-blox SARA-G3 series reference design implement all the ESD precautions described in section
2.12.3.
reports the u-blox SARA-G3 series reference designs ESD immunity test results,
according to test requirements stated in the
CENELEC EN 61000-4-2 [15], ETSI EN 301 489-1 [16],
ETSI EN 301 489-7 [17] and ETSI EN 301 489-24 [18].
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 equipments providing
conductive enclosure surface.
Antenna port
+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
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.
Antenna port
+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 39: Enclosure ESD immunity level of u-blox SARA-G3 series modules reference designs
2.12.3
ESD application circuits
The application circuits described in this section are recommended and should be implemented in any
device that integrates a SARA-G3 series module, according to the application board classification (see
