Viavi CellAdvisor 5G, User Manual

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Using LTE/LTE-A FDD Analyzer
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Frame
The Frame measures the modulation accuracy of all the data and control channels at the frame (10 ms).
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 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.
4 Optional. Tap CFI and select the type Manual or Auto .
Auto lets the instrument set the number of OFDM symbols used for transmitting PDCCHs in a subframe, and Manual sets the
number of OFDM symbols manually.
NOTE:
The set of OFDM symbols that can be used for PDCCH in a subframe is given by 0 , 2 , 3 or 4 in 1.4 MHz bandwidth
and 1 , 2 or 3 in another bandwidth.
5 Optional. Tap PHICH Ng to set the number of PHICH groups (Ng): 1/6 , 1/2 , 1 , 2 , E-1/6 , E-1/2 , E-1 , or E-2 .
6 Tap EVM Detection Mode and select Single
or
Combine .
▪
Single: Testing on one single antenna connected to your CA5G series with a cable
▪
Combine: Testing on multiple antennas connected to your CA5G series with a 2x1 or 4x1 combiner or an antenna.
7 O ptional. 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 .
f To set the threshold for PDSCH, tap PDSCH Threshold and enter a value by using the on-screen keyboard.
g To set the threshold for PDCCH, tap PDCCH Threshold and enter a value by using the on-screen keyboard.
h Tap PDSCH Modulation Type , and then select the modulation type option: Auto, QPSK, 16 QAM, 64 QAM, 256 QAM,
E-TM3.3, E-TM3.2, E-TM3.1a, E-TM3.1, E-TM2a, E-TM2, E-TM1.2 or E-TM1.1 .
If two or more modulation types are used in a frame, select Auto . If the PDSCH uses the same modulation type in a
frame or in a subframe, select a specific modulation type to get more accurate EVM.
i Tap PDCCH Mode to select REG to calculate EVM based on Resource Element Group or Average to calculate EVM after
adding all the PDCCH signals from one subframe.
j Tap PDSCH Precoding to set On or Off to enable or disable the PDSCH precoding.
Setting limit
1 Tap Menu > Limit .