Integration Manual

SARA-R4/N4 series - System Integration Manual
UBX-16029218 - R13 Product testing Page 107 of 119
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☞ The AT+UTEST command sets the module to emit RF power ignoring LTE 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 the normal module operation.
Follow the instructions suggested in the u-blox documentation. u-blox assumes no responsibilities for the
inappropriate use of this feature.
Figure 58 illustrates a typical test setup for such an RF functional test.
Applicat ion Board
SARA-R4/ N4
ANT
Applicat ion
Processor
AT
com m ands
Cellular
ant enna
Spect rum
Analyzer
or
Power
M et er
IN
Wideband
ant enna
TX
Applicat ion Board
SARA-R4/ N4
Applicat ion
Processor
AT
com m ands
Signal
Generat or
OUT
Wideband
ant enna
RX
ANT
Cellular
ant enna
Figure 58: Setup with spectrum analyzer or power meter and signal generator for SARA-R4/N4 series RF measurements