EVDO PC Embedded Datasheet

Product Datasheet
V001R006
Issue 2 (2009-01-20)
Confidencein Commercial
Page 36 of 60
Recommendations for Handling the Interference Sources
On a PC, there are various interference sources, such as the LCD, CPU, audio
circuits, and power supply. All the interference sources emit interference signals that
affect the normal operation of the module. For example, the module sensitivity can be
decreased due to interference signals. Therefore, during the design, you need to
consider how to lessen the effects of interference sources on the module. You can
take the following measures: Use an LCD with optimized performance; shield the
LCD interference signals; shield the signal cable of the PC; or design filter circuits.
4.4 Offline Mode
The offline mode can be enabled by the following method:
l
Through hardware: The W_DISABLE pin can be used to control the RF circuit.
When the pin is driven to the high level, the RF circuit works; when the pin is
driven to the low level, the RF circuit does not work.