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This feature allows the measurement of the transmitter and receiver power levels to check component assembly
related to the module antenna interface and to check other device interfaces on which RF performance depends.
To avoid module damage during transmitter test, a proper antenna according to module
specifications or a 50 termination must be connected to the ANT1 port.
To avoid module damage during receiver, test the maximum power level received at the ANT1
and ANT2 ports which must meet the module specifications.
The AT+UTEST command sets the module to emit RF power ignoring cellular signaling protocol. This
emission can generate interference that can be prohibited by law in some countries. The use of this feature
is intended for testing purposes in controlled environments by qualified users and must not be used during
normal module operation. Follow the instructions suggested in u-blox documentation. u-blox assumes no
responsibilities for the inappropriate use of this feature.
Figure 72 illustrates a typical test setup for such an RF functional test.
Application
Processor
AT
commands
Application Board
Application
Processor
AT
commands
Application Board
Figure 72: Setup with spectrum analyzer or power meter and signal generator for radiated measurements
UBX-16010573 - R12
Cellular
antenna
LARA-R2 series
ANT1
Cellular
antennas
LARA-R2 series
ANT1
ANT2
LARA-R2 series - System Integration Manual
Wideband
antenna
Spectrum
Analyzer
IN
TX
Wideband
antenna
OUT
RX
Generator
or
Power
Meter
Signal
Product testing
Page 144 of 157
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