LISA-U2 series - System integration manual
UBX-13001118 - R27
System description
Page 32 of 183
C1-Public
1.5.3.4
2G and 3G fixed active mode (power saving disabled)
Power saving configuration is disabled by default, or it can be disabled using the appropriate AT
command (see the u-blox AT commands manual
, 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
: 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
2G case: 0.47-2.12 s
3G case: 0.64-5.12 s
Paging period
Time
[s]
Current [mA]
100
50
0
Time [ms]
Current [mA]
100
50
0
RX
Enabled
DSP
Enabled
Figure 15: 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
