Viavi CellAdvisor 5G, User Manual

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Using DSS Signal Analyzer
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NOTE
Based on the GSCN input frequency, the SSB Frequency is automatically changed.
Time Alignment Error measurement with DSS Analyzer
Conducting OTA measurements
OTA channel scanner
The Channel Scanner is a radio receiver that can automatically tune or scan two or more discrete frequencies and multi-channels,
indicating when it finds a signal on one of them and then continuing scanning when that frequency goes silent.
Setting measure setup
After configuring spectrum measurement in " Configuring Spectrum Measurements ", you can set the measure setup to continue your
measurement. The measurement settings can be saved and recalled as a file by selecting File Type as Setup and load the file onto
the instrument using the
Save/Load icons on the side bar.
1 Tap the Setup ( )icon on the side bar.
2 Tap to switch Radio Config and set Duplex Type (FDD/TDD), DSS Type (Co-channel/ Adjacent channel ), and Technology
(LTE/NR) and other related parameters as below:
You can select Co-channel to find NR frequency based on the LTE operating frequency in co-channel and select Adjacent
channel to search both LTE and NR frequency. Note that Adjacent channel will be available in the next release.
When LTE is selected as Technology , do the following steps:
a Select Bandwidth (MHz) from the following choices: 20 , 15 , 10 , or 5 .
b Select MIMO between 2x2 and 4x4 .
c Select Cyclic Prefix between Normal and Extended .
Cyclic prefix works as a buffer region or guard interval to protect the OFDM signals from inter symbol interference.
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Normal : Intended to be sufficient for the majority of scenarios
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Extended : Intended for scenarios with particularly high delay spread.