Quectel LTE-A Module Series - Dpr

LTE-A Module Series
EM120R-GL&EM160R-GL Hardware Design
EM120R-GL&EM160R-GL_Hardware_Design 49 / 79
Host Module
WAKE_ON_WAN#
BB
GPIO
23
VCC_IO_HOST
Note: The voltage level on VCC_IO_HOST depends on the host side due to open drain in pin 23.
Wake up the host
1 s
H
L
R1
10K
Figure 29: WAKE_ON_WAN# Signal Reference Circuit Design
3.10.5. DPR
EM120R-GL&EM160R-GL provide a DPR (Dynamic Power Reduction) signal for body SAR (Specific
Absorption Rate) detection. The signal is sent by a host system proximity sensor to
EM120R-GL&EM160R-GL modules to provide an input trigger which will reduce the output power in the
radio transmission.
Table 20: Function of the DPR Signal
Please refer to document [3] for more details about AT+QCFG="sarcfg" command.
DPR Level
Function
High/Floating
Max transmitting power will NOT back off
Low
Max transmitting power will back off by executing AT+QCFG="sarcfg" command
NOTE