VIAVI CellAdvisor 5G: 5GNR RF Characterisation

Summary

This video tutorial demonstrates the ease of characterizing a 5G signal using the Salvaso 5G analyzer. Key properties like channel bandwidth and beamforming are discussed, highlighting the signal's complexity in frequency and time. The tutorial guides viewers through the process of setting up the analyzer, adjusting the power level, and using a persistence spectrum to clearly identify a 5G signal with a 95 MHz transmission bandwidth and a 28.8 MHz SSB aligned with the channel. For more insights, viewers are directed to Vicom's website.

Takeaways

• 📶 The video demonstrates how to characterize a 5G signal using the VRV Sullivan tool.
• 🌐 Key properties of 5G signals include channel bandwidth, which ranges from 100 to 400 MHz, and the use of millimeter wave technology.
• 📡 Beamforming is a critical aspect of 5G signals, with signals being broadcast in SSV blocks and having a frequency offset within the channel.
• 🔄 Beam signals in 5G are not continuously transmitted but follow a cycle, with beams broadcasted every 20 milliseconds.
• 🕒 Despite the complexity in frequency and time, the Salvaso 5G tool can easily characterize 5G signals using the persistence spectrum method.
• 🛠️ The process begins by accessing the main menu and selecting the real-time spectrum analyzer persistence spectrum option.
• 🔍 Users can set the slicer for 5G measurement either by channel or by frequency; the script uses channel number as an example.
• 📈 The script guides through setting the power level by adjusting the amplitude, including the removal of the default 20 dB attenuator and enabling preamplification.
• 📊 Adjustments on the trace detector are necessary for TDD signals, including peak detection and resolution increase from 1 Hz to 30 kHz.
• 📈 The final result shows a clear 5G signal with a transmission bandwidth of 95 MHz and an SSB of 28.8 MHz aligned with the channel.
• 🔗 For more information, viewers are directed to visit Vicom's website.

Q & A

What is the main topic of the video?

The main topic of the video is demonstrating how to characterize a 5G signal using the Salvaso 5G tool.

What are the key properties of a 5G signal mentioned in the script?

The key properties of a 5G signal mentioned are channel bandwidth, millimeter wave capabilities ranging from 100 to 400 megahertz, beamforming, and the transmission cycle of beams every 20 milliseconds.

What is the range of channel bandwidth for 5G signals in millimeter wave?

The channel bandwidth for 5G signals in millimeter wave can range from 100 to 400 megahertz.

What is beamforming and how does it relate to 5G signals?

Beamforming is a signal processing technique used in 5G to improve signal strength and quality. It involves sending signals out in SSV blocks that can have a frequency offset within the channel but are not distributed across the channel bandwidth.

How often are the beams broadcasted in 5G signals?

The beams in 5G signals are broadcasted every 20 milliseconds.

What is the Salvaso 5G tool used for in the video?

The Salvaso 5G tool is used to characterize 5G signals by analyzing their properties using a persistence spectrum.

How does one initiate the process of characterizing a 5G signal in the Salvaso 5G tool?

One initiates the process by going into the main menu, selecting 'Real-Time Spectrum Analyzer Persistence Spectrum', and assigning a specific title to the measurement.

What are the two methods mentioned for setting the slicer in the Salvaso 5G tool to measure the 5G signal?

The two methods mentioned are setting the slicer by channel or by frequency.

Which band is selected in the video for characterizing the 5G signal?

In the video, the 5DNR band is selected for characterizing the 5G signal.

How is the power level set in the Salvaso 5G tool?

The power level is set by making adjustments on the amplitude, including removing the default attenuator of 20 dBs and enabling the preamplifier for increased sensitivity.

What adjustments are made to the trace detector for analyzing a Time Division Duplex (TDD) 5G signal?

For analyzing a TDD 5G signal, adjustments are made on the trace detector to peak, and the resolution is increased from 1 Hertz to 30 Kilohertz.

What is the transmission bandwidth and SSB of the 5G signal shown in the video?

The transmission bandwidth of the 5G signal shown in the video is 95 megahertz, and the SSB (Sub-Spectrum Block) is 28.8 MHz, which is aligned with the channel.