Viavi CellAdvisor 5G, User Manual

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Using DSS Signal Analyzer
270
12 Tap PDSCH Threshold to set the threshold for PDSCH and enter a value by using the on-screen keyboard.
13 Tap PDSCH Precoding to set On or Off to enable or disable the PDSCH precoding.
14 Tap EVM Detection Mode to set Combine or Single .
▪
Combine : Testing on multiple antennas connected to your CA5G series with a 2x1 or 4x1 combiner or an antenna.
▪
Single : Testing on one single antenna connected to your CA5G series with a cable.
15 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 If you want to set the NR limit, tap NR Limit and set the limits depending on your selected measurement mode:
To set the
limit for
Select
Set
Frequency error
Frequency
error
Test limits On/Off, High Limit/Low Limit
Primary
Synchronization
Signal for error
vector
magnitude
EVM PSS Test limits On/Off, High Limit
Secondary
Synchronization
Signal for error
vector
magnitude
EVM SSS
Test limits On/Off, High Limit
Primary
Synchronization
Signal for
power
Power
PSS
Test limits On/Off, High Limit/Low Limit
Note that based on the Reference Mode you have chosen from Menu > Reference Mode between
Absolute and Relative , you can set the first high/low limit when you chose absolute, and second
high/low limit when you chose relative.
Secondary
Synchronization
Signal for
power
Power
SSS
Test limits On/Off, High Limit/Low Limit
Note that based on the Reference Mode you have chosen from Menu > Reference Mode between
Absolute and Relative , you can set the first high/low limit when you chose absolute, and second
high/low limit when you chose relative.
Physical
Broadcast
Channel for
power
Power
PBCH
Test limits On/Off, High Limit/Low Limit
Note that based on the Reference Mode you have chosen from Menu > Reference Mode between
Absolute and Relative , you can set the first high/low limit when you chose absolute, and second
high/low limit when you chose relative.
Time error Time Error Test limits On/Off, High Limit/Low Limit
3 If you want to set the LTE limit, tap LTE Limit and set the limits depending on your selected measurement mode:
To set the
limit for
Select
Set
Frequency error
Frequency
Error
Test limits On/Off, High Limit/Low Limit
Root Mean
Square (RMS)
average of the
reference signal
for data error
vector
RS EVM Test limits On/Off, High Limit