Rev 1.0
1/27/14
42
6. Power Consumption
The following sub-sections details out the power consumption values of the
USR3500 for various modes and RF bands. These consumption values were
obtained by performing measurements on USR3500 samples at a temperature of
25°C using a 3V SIM card.
Note:
For power consumption, the software version used is R7.50 A1.
Refer to the Courier M2M Application guide at
http://www.usr.com/support/3500
for
details on how to upgrade modem firmware.
The table below gives the average power consumption of the USR3500 for the first
10s when power supply (DC-IN, supplied by Agilent 66321D in this example) is
initially applied to it with no serial port, LED ON or SIM card at ambient temperature.
Table 31. Initial Power Consumption (Typical)
Configuration
USR3500 Average Power
Consumption with FW R7.50 A1
DC-IN @ 13.2V
18mA
6.1. Various Operating Modes
The power consumption levels of the USR3500 vary depending on the operating
mode used. Refer to the table below for the different kinds of operating modes
available. Refer to Appendix 3.1 of the AT Commands Interface Guide at
http://www.usr.com/support/3500
for the working mode description.
Table 32. USR3500 Operating Modes
Operating Mode
Description
GSM Connected Mode
The modem is connected to a live GSM network, during circuit switch voice or data
call.
Transfer Mode
The modem has GPRS data transfer connection with a live network, during packet
data transmission.
Active mode with GSM
stack in Idle
When the RF function is active and the modem is synchronized with the network, but
there is currently no communication.
Sleep mode with GSM
stack in Idle
When the RF function is disabled but is regularly activated to remain synchronized
with the network.
This mode only works when the DTE sends an AT command to shut the serial link
down (DTE turns DTR to inactive state).
Active Mode
When the RF function is disabled and there is no synchronization with the network
but the UART is available.
Sleep Mode
When the RF function is disabled, and there is no synchronization with the network
and the UART is not available.
