Dpr - Quectel LTE-A Module Series Hardware Design

Host
GPIO
Note: The voltage level on VCC_IO_HOST depends on the host side due to open drain in pin 23.
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
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
Please refer to document [3] for more details about AT+QCFG="sarcfg" command.
EM120R-GL&EM160R-GL_Hardware_Design
EM120R-GL&EM160R-GL Hardware Design
VCC_IO_HOST
R1
10K
WAKE_ON_WAN#
1 s
H
Wake up the host
L
LTE-A Module Series
Module
BB
23
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