EG_GenPro78e_1003_UG_007_UK
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Description and non-contractual illustrations in this document are given as an indication only.
ERCO & GENER reserves the right to make any modifications.
8.2.4.2 External GSM Antenna
The external GSM antenna is connected to the modem via the SMA/M connector. It must have the characteristics
listed in the table below
.
Table: External GSM antenna characteristics
Antenna frequency range
850/900/1800/1900 MHz
Impedance
50 Ohms nominal
DC Impedance
0 Ohm
Gain (a cable)
0 dBi (in a minimum direction)
VSWR (Rx max TX max)
1.5:1
Polarisation Linear
Note: See chapter
10 Recommended Accessories
for GSM antenna recommended by ERCO & GENER.
8.2.5 RESET Signal
Typical Reset Connection
Table : RESET signal operating conditions
Parameter
Condition
Min.
Typ.
Max.
Unit
V
IL
Input Voltage – Low or float
0.58
Vdc
V
IH
Input Voltage – High
1.36
1.95
Vdc
I
PU
Internal Pull-Up Resistor
-40
-31
-15
µA
I
IL
Current
sink
-2.0
mA
Reset Pulse Duration
10
mS