Agilent Technologies E4404B - Page 11

Chapter 1 1-5
GSM Use Model
The Fault Finding Process
Use Table 1-1 to help determine which measurement to perform when
troubleshooting your cell site base transceiver system.
Table 1-1 Troubleshooting Your Cell Site Base Transceiver System
System
Component
Fault Symptom Related Measurements Analyzer
Mode
BTS
Power Levels Transmitter power
Power vs time
GSM
Modulation Quality 3KDVHDQGIUHTXHQF\HUURU
Interference with other
systems
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Power Steps
Air Interface
In-channel interference Transmitter power
Monitor band/channel
GSM
In-band interference Monitor band/channel
Transmit band spurious
Receive band spurious
Out of band interference Out of band spurious
Cables and
Antenna
Amplitude flatness Loss/gain
(manual measurement)
SA
Reflection Responses Return loss (VSWR)
(manual measurement)
Cable defect &DEOHIDXOWORFDWLRQ GSM