Ublox LISA-U100, Руководство по интеграции

Страница: 147 / 190

LISA-U series - System Integration Manual
UBX-13001118 - R17 Advance information Design-In
Page 147 of 190
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-U series reference designs implement all the ESD precautions described in section 2.5.3.
u-blox LISA-U series reference designs ESD immunity test results are reported in the Table 55, according to test
requirements stated in the
CENELEC EN 61000-4-2 [12], ETSI EN 301 489-1 [13], ETSI EN 301 489-7 [14] and
ETSI EN 301 489-24 [15].
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 LISA-U1 series Not Applicable Test not applicable to the u-blox reference design
because it provides antenna with insulating
surface.
The test is applicable only to equipments providing
antenna with conductive surface.
LISA-U2 series +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-U230-01S +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 LISA-U1 series +8 kV / -8 kV Test applicable to the u-blox reference design
because it provides antenna with insulating
surface.
The test is applicable only to equipments providing
antenna with insulating surface.
LISA-U2 series +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-U230-01S +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 55: Enclosure ESD immunity level of u-blox LISA-U1 series and LISA-U2 series modules reference designs