Installation Instructions

LISA-U2 series - System Integration Manual
UBX-13001118 - R19 Early Production Information Product Testing
Page 159 of 175
Application Board
LISA-U2 series
ANT
Application
Processor
AT
Commands
Wireless
Antenna
Spectrum
Analyzer
or
Power
Meter
IN
Wideband
Antenna
TX
Application Board
LISA-U2 series
ANT
Application
Processor
AT
Commands
Wireless
Antenna
Signal
Generator
OUT
Wideband
Antenna
RX
Figure 76: Setup with spectrum analyzer and signal generator for radiated measurement
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 from which depends the RF
performance.
To avoid module damage during transmitter test, a proper antenna according to module
specifications or a 50 Ω termination must be connected to ANT pin.
To avoid module damage during receiver test the maximum power level received at ANT pin
must meet module specifications.
The AT+UTEST command sets the module to emit RF power ignoring 2G/3G signalling protocol. This
emission can generate interference that can be prohibited by law in some countries. The use of this
feature is intended for testing purpose in controlled environments by qualified user and must not be used
during the normal module operation. Follow instructions suggested in u-blox documentation. u-blox
assumes no responsibilities for the inappropriate use of this feature.
Example of production tests for OEM manufacturer:
1. Trigger TX GMSK burst at low Power Control Level (lower than 15) or a RX measure reporting to check:
o If ANT pin is soldered
o If ANT pin is in short circuit
o If module was damaged during soldering process or during handling (ESD, mechanical shock…)
o If antenna matching components on application board are soldered
o If integrated antenna is correctly connected