Sierra Wireless Q2687 Manuel D’Utilisation
Wireless CPU Quik Q2687
Design Guidelines
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WA_ENG_Q2687_PTS_001-002
September 11, 2006
6.1.4 Antenna
Warning:
Wavecom strongly recommends to work with an antenna manufacturer either to
develop an antenna adapted to the application or to adapt an existing solution to the
application.
application.
Both the mechanical and electrical antenna adaptation are one of the key issues in
the design of GSM terminal.
the design of GSM terminal.
6.2 Mechanical Integration
Attention should be paid to:
• Antenna cable integration (bending, length, position, etc)
• Leads of the Wireless CPU to be soldered to the Ground plane
• Leads of the Wireless CPU to be soldered to the Ground plane
6.3 Operating System Upgrade
The Wireless CPU Quik Q2687 Operating System is stored in flash memory and may
easily be upgraded.
IMPORTANT:
In order to follow regular changes in the GPRS standard and to offer a state-of-the-art
Operating System, Wavecom recommends that the application designed around a
Operating System, Wavecom recommends that the application designed around a
WISMO (or WISMO based product) allow easy Operating System upgrades on the
Wireless CPU via the standard Xmodem protocol. Therefore, the application shall
Wireless CPU via the standard Xmodem protocol. Therefore, the application shall
either allow a direct access to the WISMO serial link through an external connector or
implement any mechanism allowing the WISMO Operating System to be downloaded
via Xmodem.
via Xmodem.
The Operating System file may be downloaded to the Wireless CPU using the
Xmodem protocol. The AT+WDWL command allows the download process to be
Xmodem protocol. The AT+WDWL command allows the download process to be
launched (see the description in the AT Command User Guide).
The serial signals required to proceed with Xmodem downloading are:
Rx, Tx, RTS, CTS and GND.
The Operating System file may also be downloaded to the Wireless CPU using the
DOTA (download over the air) feature. This feature is available with the Open AT
®
interface. For more details, please, refer to the Open AT
®
documentation.