Specifications

15
3.5. Cellular Module
NOTE: The following section refers to EM-X270 - revisions 1.3 and higher. For previous
revisions of EM-X270 please refer to the shaded section below.
The EM-X270 cellular connectivity feature is based on the Telit 864 series of cellular
modules. The cellular module connector (P37) is conformant with the Telit global form
factor interface and can accommodate the following modules:
• GC864 – quad-band EGSM 850 / 900 / 1800 / 1900 MHz
•
UC864-E – UMTS/HSDPA 2100 MHz, quad-band EGSM 850 / 900 / 1800 /
1900 MHz
•
CC864 – dual-band CDMA 800 / 1900 MHz
The cellular module is interfaced to the PXA270 processor via the BT_UART.
The SIM interface is connected to the on-board SIM card socket (see 4.11 for a detailed
SIM card socket description).
Audio Path Connection
The cellular module audio signals are connected to the EM-X270 audio system, providing
the audio functionality of a standard cellular phone. See section 3.4 for more details about
the audio path.
Antenna
The antenna should fulfill the following requirements:
Frequency range Depending on frequency band(s) provided by the network
operator, the customer shall use the most suitable antenna for
that/those band(s)
Bandwidth 70MHz in GSM850, 80MHz in GSM900, 170 MHz in DCS,
140 MHz in PCS, 250 MHz in WCDMA2100
Gain > 1.5 dBi
Impedance 50 ohm
Input power > 2 W peak power
VSWR absolute max 10:1
VSWR recommended < 2:1
Please refer to Telit’s specific module documentation for more details.
The antenna is connected to a standard UFL connector present on the cellular module.