LISA-U series - System Integration Manual
UBX-13001118 - R17
Advance information
System description
Page 34 of 190
1.5.3.4
2G and 3G fixed active mode (power saving disabled)
Power saving configuration is by default disabled, or it can be disabled using the appropriate AT command (see
the
u-blox AT Commands Manual
[3], AT+UPSV command). When power saving is disabled, the module does
not automatically enter idle-mode whenever possible: the module remains in active mode.
The module processor core is activated during active-mode, and the 26 MHz reference clock frequency is used.
An example of the current consumption profile of the data module when power saving is disabled is shown in
Figure 16: the module is registered with the network, active-mode is maintained, and the receiver and the DSP
are periodically activated to monitor the paging channel for paging block reception.
ACTIVE MODE
10-25 mA
10-25 mA
2G case: 0.47-2.12 s
3G case: 0.64-5.12 s
Paging period
Time [s]
Current [mA]
150
100
50
0
Time [ms]
Current [mA]
150
100
50
0
10-25 mA
RX
Enabled
DSP
Enabled
35-40 mA
2G case: 60-130 mA
3G case: 50-90 mA
2G case: 60-130 mA
3G case: 50-90 mA
Figure 16: Description of the VCC current consumption profile versus time when power saving is disabled: the active-mode is
always held, and the receiver and the DSP are periodically activated to monitor the paging channel for paging block reception
