Carrier 38TXA Guide Guía de usuario Pagina 179

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Chapter 4 179
Parameter Descriptions
21. RT Use DUPLEX OUT & ANT IN [0=no 1=yes]
21. RT Use DUPLEX OUT & ANT IN [0=no
1=yes]
This parameter allows you to select which RF ports on the test system
will be used for cellular phone tests. A value of 0 causes the RF IN/OUT
port to be used for both forward and reverse channels. A value of 1
causes the DUPLEX OUT port to be used for the forward channel and
the ANT IN port to be used for the reverse channel.
Use of the DUPLEX OUT and ANT IN ports allows the RF link between
the test system and the cellular phone to be established via antennas
instead of coaxial cable.
CAUTION
If the RF link is accomplished with antennas, it must be done inside a
shielded environment to avoid interference with local cellular telephone
service.
Do not overdrive the antenna port’s 200 mW maximum input,
particularly when measuring the maximum RF power of the MSUT.
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