User's Manual
Table Of Contents
- 1 Overview
- 2 GE864-QUAD V2 Mechanical Dimensions
- 3 GE864-QUAD V2 module connections
- 4 Hardware Commands
- 5 Power Supply
- 6 Antenna
- 7 Logic level specifications
- 8 Serial Ports
- 9 Audio Section Overview
- 10 General Purpose I/O
- 10.1 GPIO Logic levels
- 10.2 Using a GPIO Pad as INPUT
- 10.3 Using a GPIO Pad as OUTPUT
- 10.4 Using the RF Transmission Control GPIO4
- 10.5 Using the RFTXMON Output GPIO5
- 10.6 Using the Alarm Output GPIO6
- 10.7 Using the Buzzer Output GPIO7
- 10.8 Indication of network service availability
- 10.9 RTC Bypass out
- 10.10 External SIM Holder Implementation
- 11 DAC and ADC section
- 12 Conformity Assessment Issues
- 14 Document Change Log
GE864-QUAD V2 Hardware User Guide
1vv0300841 Rev.0.1 24/11/09
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 28 of 65
6 Antenna
The antenna connection and board layout design are the most important part in the full product design
and they strongly reflect on the product overall performances, hence read carefully and follow the
requirements and the guidelines for a proper design.
6.1 GSM Antenna Requirements
As suggested on the Product Description the antenna and antenna line on PCB for a Telit GE864-
QUAD V2 device shall fulfill the following requirements:
ANTENNA REQUIREMENTS
Frequency range
Depending by frequency band(s)
provided by the network operator, the
customer shall use the most suitable
antenna for that/those band(s)
Bandwidth
70 MHz in GSM850, 80 MHz in
GSM900, 170 MHz in DCS & 140
MHz PCS band
Gain
1.4dBi @900 and 3dBi @1800
1.4dBi @850 and 3dBi @1900
Impedance
50 ohm
Input power
> 2 W peak power
VSWR absolute max
<= 10:1
VSWR recommended
<= 2:1
When using the Telit GE864-QUAD V2, since there's no antenna connector on the module, the
antenna must be connected to the GE864-QUAD V2 through the PCB with the antenna pad.
In the case that the antenna is not directly developed on the same PCB, hence directly connected at
the antenna pad of the GE864-QUAD V2, then a PCB line is needed in order to connect with it or with
its connector.