User guide

EG_GenPro2xe_1003_UG_005_UK Page 58 / 63
Descriptions and non-contractual illustrations in this document are given as an indication only.
ERCO&GENER reserves the right to make any modifications.
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8.2.6.2 GSM external antenna
The GSM external antenna is connected to the modem via the SMA/M connector.
The external antenna must have the characteristics described in the table below.
Table: Characteristics of the GSM external antenna
Frequency band 850/900/1800/1900 MHz
Impedance 50 Ohms nominal
DC impedance 0 Ohm
Gain 0 dBi in a minimum direction
VSWR (Rx max TX max) 1.5:1
Polarization Linear
See chapter 10 for the GSM antennas recommended by ERCO & GENER.
8.2.7 Characteristics of the accelerometer
Table: Characteristics of the accelerometer
Dynamic ± 2g or ± 8g driven by software
Interface (internal) SPI with the ARM
Multiple Interruption programmable
Up-going filter programmable
8.3 Environmental characteristics
To ensure a correct functioning of the modem, the limits listed in the table below must be respected.
Table: Environmental characteristics
Operating temperature -20 °C à +60 °C
Storage temperature -40 °C à +85 °C
Operating humidity without condensation HR < 70% @ +55°C
Atmospheric pressure normal
If the battery option is used, the environmental conditions are different. See table below.