TOBY-L1 and MPCI-L1 series - System Integration Manual
UBX-13001482 - R04
Advance Information
Design-in
Page 69 of 90
In addition to taking hardware design measures, the increase of module temperature can be moderated by the
software implementation of the application:
•
Enable module connected-mode for a given time period, and then disable it for a time period enough long
to properly mitigate temperature increase.
2.14
ESD guidelines
2.14.1
ESD immunity test overview
The immunity of devices integrating TOBY-L1 and MPCI-L1 series modules to Electro-Static Discharge (ESD) is
part of the Electro-Magnetic Compatibility (EMC) conformity which is required for products bearing the CE
marking, compliant with the R&TTE Directive (99/5/EC), the EMC Directive (89/336/EEC) and the Low Voltage
Directive (73/23/EEC) issued by the Commission of the European Community.
Compliance with these directives implies conformity to the following European Norms for device ESD immunity:
ESD testing standard
CENELEC EN 61000-4-2
[6] and the radio equipment standards
ETSI EN 301 489-1
ETSI
EN 301 489-7
ETSI EN 301 489-24
[9], which requirements are summarized in Table 26.
The ESD immunity test is performed at the enclosure port, defined by
ETSI EN 301 489-1
[7] as the physical
boundary through which the electromagnetic field radiates. If the device implements an integral antenna, the
enclosure port is seen as all insulating and conductive surfaces housing the device. If the device implements a
removable antenna, the antenna port can be separated from the enclosure port. The antenna port includes the
antenna element and its interconnecting cable surfaces.
The applicability of ESD immunity test to the whole device depends on the device classification as defined by
ETSI
EN 301 489-1
[7]. Applicability of ESD immunity test to the related device ports or the related interconnecting
cables to auxiliary equipment, depends on device accessible interfaces and manufacturer requirements, as
defined by
ETSI EN 301 489-1
Contact discharges are performed at conductive surfaces, while air discharges are performed at insulating
surfaces. Indirect contact discharges are performed on the measurement setup horizontal and vertical coupling
planes as defined in
CENELEC EN 61000-4-2
For the definition of integral antenna, removable antenna, antenna port, device classification refer to the
ETSI EN 301 489-1
[7]. For the contact and air discharges definitions refer to
CENELEC EN 61000-4-2
Application
Category
Immunity Level
All exposed surfaces of the radio equipment and ancillary equipment in a
representative configuration
Contact Discharge
4 kV
Air Discharge
8 kV
Table 26: Electro-Magnetic Compatibility ESD immunity requirements as defined by CENELEC EN 61000-4-2, ETSI EN 301 489-1,
ETSI EN 301 489-7, ETSI EN 301 489-24
2.14.2
ESD immunity test of TOBY-L1 and MPCI-L1 series reference designs
Although Electro-Magnetic Compatibility (EMC) certification is required for customized devices integrating
TOBY-L1 and MPCI-L1 series modules for R&TTED and European Conformance CE mark, EMC certification
(including ESD immunity) has been successfully performed on TOBY-L1 and MPCI-L1 series modules reference
design according to
CENELEC EN 61000-4-2
ETSI EN 301 489-1
ETSI EN 301 489-7
ETSI EN 301 489-
24
[9] European Norms.
The EMC / ESD approved u-blox reference designs consist of a TOBY-L1 and MPCI-L1 series module installed
onto a motherboard which provides supply interface, SIM card and communication port. External antennas are
connected to SMA connectors provided on the motherboard for the LTE antennas.
