Viavi CellAdvisor 5G, User Manual

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Using LTE/LTE-A FDD Analyzer
118
Time Alignment Error measurement with LTE/LTE-A FDD Analyzer
Data Allocation Map
The Data Allocation Map function represents data allocation as a frame.
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 Bandwidth and select the value from the following choices: 1.4 MHz , 3 MHz , 5MHz , 10 MHz , 15 MHz, or 20 MHz .
3 Tap Subframe Number to set the number of subframe using the on-screen keyboard.
4 Optional. Tap Physical Cell ID and select the type, Manual or Auto .
Auto lets the instrument detect the Physical Cell ID for the LTE signal automatically, and Manual sets a specific Physical Cell
ID for the LTE signal manually in order to speed up the synchronization with a BTS.
5 Optional. To set the threshold for PDSCH, tap PDSCH Threshold and enter a value by using the on-screen keyboard.
6 Optional. Tap Miscellaneous under Menu to do the following as needed.
a To select the number of antenna ports, tap the MIMO and select 2x2 or 4x4 .
b To assign a antenna port number automatically or manually, tap the Antenna Port under Antenna menu and select the
option: Auto , Antenna 0 , Antenna 1 , Antenna 2 , or Antenna 3 .
If the MIMO is set to 2x2, the antenna ports 2 and 3 are disabled.
c To turn the Multimedia Broadcast Multicast Service ( MBMS ) feature on or off, tap MBMS and select On or Off . For proper
MBMS testing, you need to set the Subframe Number in the upper right screen with the same PMCH subframe number.
If this setting is on, the measurement item MBSFN RS appears in the result table.
d To set the Multicast Broadcast Single Frequency Network ( MBSFN ) detection automatically or manually for MBMS
testing, tap MBSFN and select Auto or Manual .
An automatically detected or manually entered MBSFN ID appears on the screen.
e To select the Cyclic Prefix, tap Cyclic Prefix and select Normal or Extended .