How-To Test Tips: TDD Automated Gated Spectrum

Summary

This video script introduces how to use OneAdvisor 800 and CellAdvisor 5G for 5G NSA interference analysis. It covers starting with a blind scanner, identifying signals, setting up TDD Auto Gated Spectrum, and performing signal analysis to detect uplink/downlink transitions and interference. Real-time spectrogram is used for monitoring.

Takeaways

• 📡 The video discusses 5G NSA interference analysis using TDD Auto Gated Spectrum in OneAdvisor 800 and CellAdvisor 5G with a shared user interface.
• 🔍 The blind scanner is used to identify signals transmitted over the air within a specific frequency range, such as 3.7 to 3.8 gigahertz.
• 🔒 The blind scanner is set for NR (New Radio) to start searching for signals in the designated frequency range.
• 📊 In 5G signal analysis, TDD Auto Gated Spectrum and Persistent Spectrogram are selected for detailed examination of the signal.
• 🚀 TDD Auto Gated Spectrum automatically assigns gates to uplink slots, simplifying the process for non-standalone 5G setups.
• 🔄 The auto configuration feature is used to set up the signal, which in the example is 16 megahertz wide.
• 📈 Analysis mode allows for the examination of the signal in the time domain, providing insights into uplink activity and signaling.
• 🔎 By selecting a specific slot, the transition from uplink to downlink can be observed, which is crucial for setting the window to trigger the spectrum.
• 🛑 The absence of activity on the uplink or downlink during the flexible slot transition is ideal for performing interference analysis.
• 📋 Real-time persistent spectrum with spectrogram is used to monitor for any interference, with the ability to mark and analyze interference signals if present.
• 🔗 For further information, viewers are directed to VIAVI 5G test solutions, indicating the source of the tools and expertise discussed.

Q & A

What is the main topic of the video script?

The main topic of the video script is about testing 5G NSA interference and analysis using TDD Auto Gated Spectrum in OneAdvisor 800 and CellAdvisor 5G.

What is the purpose of the blind scanner in the context of the video?

The blind scanner is used to identify signals being transmitted over the air within a specific frequency range.

What frequency range is set for the blind scanner in the video?

The blind scanner is set for the frequency range of 3.7 to 3.8 gigahertz.

What is TDD Auto Gated Spectrum and how is it used in the video?

TDD Auto Gated Spectrum is a feature that automatically assigns the gate into the uplink slots for signal analysis, and it is used to analyze the signal in time domain.

How does the video script describe the process of signal analysis in the time domain?

The script describes using the TDD Auto Gated Spectrum to see the signal in the time domain, doing an auto scale to observe the behavior and signaling, and detecting uplink slots.

What is the significance of selecting a specific slot in the signal analysis?

Selecting a specific slot allows the viewer to look into all the symbols, observe the uplink to downlink transition, and set the window to trigger the spectrum during inactive periods for interference analysis.

How does the video script differentiate between standalone and non-standalone 5G setups in terms of configuration?

In the case of non-standalone 5G, the script mentions that the setup has to be done manually using auto configuration, whereas for standalone, it might be automatically configured.

What is the purpose of the Persistent Spectrogram in the video?

The Persistent Spectrogram is used to perform real-time analysis of the spectrum, showing activity or interference over time.

How does the video script suggest identifying interference in the spectrum?

The script suggests using the marker button to set up a marker on the interference signal for further analysis.

What is the final step mentioned in the video script for analyzing interference?

The final step is to look into the real-time persistent spectrum with the spectrogram to check for any activity or interference.

Where can viewers find more information about the 5G test solutions discussed in the video?

Viewers can find more information about VIAVI 5G test solutions on their website.

Outlines

00:00

📡 Introduction to 5G NSA Interference Testing

This paragraph introduces the topic of 5G NSA interference testing. It outlines the use of OneAdvisor 800 and CellAdvisor 5G, both equipped with a user interface that supports TDD Auto Gated Spectrum analysis. The speaker begins by setting up the blind scanner to identify signals in the 3.7 to 3.8 gigahertz frequency range and selecting the NR (New Radio) standard for signal search. The focus is on the process of signal identification and preparation for further analysis.

Keywords

💡5G NSA Interference

5G NSA (Non-Standalone) Interference refers to the potential disruptions or disturbances that can occur within the 5G network when it operates in non-standalone mode, relying on the existing 4G LTE infrastructure. In the video, this concept is central as the tutorial focuses on how to analyze and manage such interference using specific testing tools. The script mentions the process of identifying and analyzing signals to detect uplink activity, which is crucial for understanding and mitigating interference.

💡TDD Auto Gated Spectrum

TDD Auto Gated Spectrum is a feature in the testing tools mentioned in the script that automatically assigns a gate to the uplink slots in a Time Division Duplex (TDD) system. This feature is essential for analyzing the signal in the uplink direction and is used in the video to demonstrate how to set up the testing environment for 5G signal analysis. The script describes using this feature to automatically identify the frequency slots for uplink transmission in a non-standalone 5G context.

💡OneAdvisor 800

OneAdvisor 800 is a testing tool mentioned in the script that supports the analysis of 5G signals. It is part of the VIAVI 5G test solutions and is used in conjunction with CellAdvisor 5G for comprehensive signal analysis. The script highlights that both OneAdvisor 800 and CellAdvisor 5G share the same user interface, making it easier for users to perform tests and analysis.

💡CellAdvisor 5G

CellAdvisor 5G is another testing tool that complements OneAdvisor 800 in the context of the video. It is designed to analyze 5G signals and is used in the script to demonstrate the process of signal analysis, particularly focusing on the TDD Auto Gated Spectrum feature. The tool is part of the VIAVI suite of 5G testing solutions.

💡Blind Scanner

The Blind Scanner is a feature of the testing tools that can identify signals being transmitted over the air without prior knowledge of the signal characteristics. In the script, the presenter sets the blind scanner to a specific frequency range to search for signals, which is the initial step in the testing process to detect and analyze 5G signals.

💡Frequency Range

The frequency range, in this context, refers to the specific band of frequencies within which the testing tools search for signals. The script specifies a frequency range of 3.7 to 3.8 gigahertz as the setting for the blind scanner, which is an important parameter for accurately identifying and analyzing the 5G signals.

💡Signal Analysis

Signal Analysis is the process of examining the characteristics and behavior of a signal to understand its properties and performance. In the video, after identifying a signal with the blind scanner, the presenter moves on to signal analysis, where they use features like TDD Auto Gated Spectrum and Persistent Spectrogram to examine the 5G signal in detail.

💡Persistent Spectrogram

A Persistent Spectrogram is a visual representation of the signal's frequency components over time, which remains on the screen for continuous observation. In the script, it is used in conjunction with real-time analysis to monitor the signal for any activity or interference, providing a comprehensive view of the signal's behavior over time.

💡Uplink Activity

Uplink Activity refers to the transmission of signals from a user device to the base station in a wireless communication system. The script discusses detecting uplink slots and analyzing the uplink to downlink transition, which is critical for understanding the signal's behavior and identifying potential interference.

💡Auto Configuration

Auto Configuration is a feature that allows the testing tool to automatically set parameters based on the signal characteristics. In the script, the presenter uses auto configuration to set up the signal width to 16 megahertz, streamlining the testing process and ensuring accurate analysis.

💡Marker Button

The Marker Button is a tool within the testing software that allows users to mark specific points or signals of interest on the spectrogram or other visual representations. In the script, it is mentioned as a way to set up a marker on an interference signal for further analysis, which is a practical feature for identifying and addressing interference issues.

Highlights

Introduction to 5G NSA interference analysis with TDD Auto Gated Spectrum in OneAdvisor 800 and CellAdvisor 5G.

Using the blind scanner to identify signals transmitted over the air.

Setting the blind scanner for a frequency range of 3.7 to 3.8 gigahertz.

Starting the search for signals using the blind scanner.

Entering 5G signal analysis with specific selection options.

Utilizing TDD Auto Gated Spectrum for automatic gate assignment in uplink slots.

Manual setup for non-standalone scenarios using auto configuration.

Selecting analysis mode to view signal behavior in the time domain.

Performing an auto scale to observe uplink activity and signaling.

Detecting uplink slots for detailed signal analysis.

Selecting a specific slot to examine all symbols for uplink to downlink transition.

Setting the window to trigger the spectrum during inactive periods for interference analysis.

Real-time persistent spectrum visualization with spectrogram.

Identifying the absence of activity or interference in the spectrogram.

Using the marker button to set up and analyze interference signals if present.

Encouragement to visit VIAVI 5G test solutions for more information.

Closing remarks and thanks for watching the tutorial.

Transcripts

[MUSIC]

Hello everyone.

In this How-To Test Tips we're going to be talking about 5G NSA interference

analysis with TDD Auto Gated Spectrum supported in OneAdvisor 800 and

CellAdvisor 5G, both having the same user interface.

For these tests, we're going to be starting with the blind scanner.

The blind scanner is going to be able to identify the signals being transmitted

over the air.

So I'm going to be setting the blind scanner for

the frequency range of 3.7 gigahertz to 3.8 gigahertz.

And I'm going to select NR and start searching.

[MUSIC]

I found a signal that I'm going to go into signal analysis.

[MUSIC]

Here in 5G signal analysis, I'm going to be now selecting

TDD Auto Gated Spectrum and Persistent Spectrogram.

[MUSIC]

TDD Auto Gated Spectrum will automatically assign my gate into the uplink slots.

In the case of non-standalone, I have to set it up manually.

And for that I'm going to be using the auto configuration,

in this specific case my signal is 16 megahertz wide.

And then I'm going to select analysis mode.

In this mode, I'm going to be able to see the signal in time domain.

I'm going to do an auto scale.

So I can see the behavior and signaling time domain, and

the deviation it's a very good way to have an indication of the uplink activity.

So here I'm going to be able to detect the uplink slots.

And now I'm going to select a specific slot to look into all the symbols.

So here I can see my uplink to downlink transition.

That's typically when it stores the flexible slots, and

that's where I want to set my window to trigger the spectrum because that's

where we don't have any activity on the uplink or downlink.

Therefore, we're going to be able to see and perform interference analysis.

[MUSIC]

And that's it.

In this case, we're looking into realtime persistent spectrum with the spectrogram,

and we don't have any activity or any interference.

But if we do have an interference we simply select the marker button and

set it up to the interference signal.

[MUSIC]

For more information please

visit VIAVI 5G test solutions.

Thanks for watching.

[MUSIC]