Viavi CellAdvisor 5G, User Manual

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Using DSS Signal Analyzer
290
NOTE
Based on the GSCN input frequency, the SSB Frequency is automatically changed.
9 Tap PCI ( Physical Cell ID ) and select between LTE PCI and NR PCI .
a Tap to switch LTE PCI Mode to Manual or Auto and input a value from 0 to 503.
The PCI switches to Manual .
b Tap NR PCI Mode to Manual or Auto and input a value from 0 to 1007.
The PCI switches to Manual .
NOTE
You can set Auto to let the instrument detect the Physical Cell ID for the LTE/NR signal automatically and Manual
to set the specific Physical Cell ID for the LTE/NR signal manually in order to speed up the synchronization with a
BTS.
10 Tap PDSCH , and then select the PDSCH modulation type option: Auto , QPSK , 16 QAM , 64 QAM , 256 QAM , LTE E-TM3.3 ,
LTE E-TM3.2 , LTE E-TM3 . 1a , LTE E-TM3.1 , LTE E-TM2a , LTE E-TM2 , LTE E-TM1.2 or LTE 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.
11 Tap PDSCH Threshold to set the threshold for PDSCH and enter a value by using the on-screen keyboard.
12 Tap PDSCH Precoding to set On or Off to enable or disable the PDSCH precoding.
13 Tap Menu > Display and select EVM or Power .
The screen changes according to the selected options.
14 Tap Menu > Display and select Reset to refresh your measurement screen.
You can check the EVM Peak is changed at the right bottom of the measurement screen when you tap Reset.
Setting limit
1 Tap Menu > Limit .
2 Tap NR Limit and set the limits depending on your selected measurement mode:
To set the
limit for
Select
Set
Error vector
magnitude of
Primary
Synchronization
Signal
P-SS EVM Test limits On/Off, High Limit
Error vector
magnitude of
Secondary
Synchronization
Signal
S-SS EVM Test limits On/Off, High Limit
3 Tap LTE Limit and set the limits depending on your selected measurement mode:
To set the
limit for
Select
Set
Root Mean
Square (RMS)
average of the
reference signal
for data error
vector
magnitude
RS EVM Test limits On/Off, High Limit
Error vector
magnitude of
Primary
Synchronization
Signal
P-SS EVM Test limits On/Off, High Limit