Viavi CellAdvisor 5G, User Manual

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5G TM Signal Analyzer
314
Setting measure setup
Before starting the measurement, you need to set Spectrum measurements displayed on the quick access and display tab. See
"
Configuring Spectrum Measurements " for more details. 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 Radio Setup then the Radio Setup pop-up window appears, if you choose FR1 , select from the following:
a SCS 15 kHz: 5, 10, 15, 20, 25, 30, 40, 50 MHz
b SCS 30 kHz: 5, 10, 15, 20, 25, 30, 40, 50, 60, 70, 80, 90, 100 MHz
c SCS 60 kHz: 10, 15, 20, 25, 30, 40, 50, 60, 70, 80, 90, 100 MHz
d Tap Duplex Type between FDD and TDD as required.
- FDD : both uplink and downlink can transmit at the same time at different spectrum frequencies
- TDD : both uplink and downlink use the same spectrum frequencies but at different times
3 Tap Radio Setup then the Radio Setup pop-up window appears, if you choose FR2 , select from the following:
- SCS 60, 120 kHz: 50, 100 MHz
- You can only select the Duplex Type as TDD .
4 Based on the above setting, tap Test Model FR1 and select the options from the following choices: FR1-TM1.1, FR1-TM1.2,
FR1-TM3.1, FR1-TM3.1a, FR1-TM3.2, FR1-TM3.
5 Based on the above setting, tap Test Model FR2 and select the options from the following choices: FR2-TM1.1, FR2-TM2, FR2-
TM3.1.
6 Tap to switch Phase Correction to On or Off .
Phase Correction is a way of optimizing EVM performance. When you switch it On, it will decrease inter-symbol interference
and compensate distortion caused by a filter applying to each OFDM symbol.
7 Tap Symbol Phase Comp and select from the following choices: Auto , Manual , or Off .
Symbol Phase Compensation is used to compensate for phase differences between symbols caused by upconversion. Users
do not always use the instrument based on RF frequency. In this case, you can set it to Manual or Off.
▪
Auto : Setting radio frequency to center frequency.
▪
Manual : Setting radio frequency as required.
▪
Off : Setting radio frequency to 0.
NOTE:
When calculating Symbol Phase Compensation, you can use the following formula. It is a formula that complies
with 3GPP standard and used to calculate conversion of 5G NR signal to RF signal.
8 Tap to switch Select Mode to Frame or Slot .
If Slot is selected, tap the Slot No . from 0 to 19 using the on-screen keyboard. You can also set it on the screen at the bottom.
Setting limit
1
Tap the Menu > Limit on the side bar.
2 Tap the test items 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