Introduction
When Vivi is deployed in classrooms and connected via Wi-Fi, it is crucial to maintain a high-quality network connection to enable a high-quality wireless screen mirroring experience. Occasionally, IT admins may encounter issues with Wi-Fi connections related to low Signal-to-Noise Ratio (SNR), which can impact the performance of the Vivi hardware device. This knowledgebase article aims to provide IT admins with an understanding of SNR, signal strength, and background noise/interference, along with troubleshooting steps to address low SNR issues effectively using the tools provided within Vivi Central.
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Each Vivi device is equipped with two antennas, which are positioned to achieve antenna diversity. Antenna diversity allows for improved signal reception by leveraging the strengths of both antennas. To optimise SNR and signal strength, it is generally recommended to position the antennas at a 45-degree angle . or 90-degree angles from each other depending on your environment.
Positioning
Extend and orient both antennas of the Vivi device at 45-degree angles or at 90-degrees from each other for optimal performance.
Avoid blocking or obstructing the antennas with physical objects or materials.
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Utilise 5GHz Wi-Fi
Connect Vivi devices to a 5GHz Wi-Fi network whenever possible to take advantage of higher bandwidth and reduced interference compared to 2.4GHz networks.
Separate SSIDs for 2.4GHz and 5GHz
Set up separate SSIDs for the 2.4GHz and 5GHz networks to enable Vivi devices to connect directly to the desired 5GHz band. If you have a dedicated SSID for Vivi, then consider only enabling only one of these frequencies.
Band Steering
Implement band steering functionality on the Wi-Fi network infrastructure to encourage devices to connect to the 5GHz network automatically.
Band steering directs capable devices, such as Vivi devices, to connect to the 5GHz band, optimising performance and SNR.
Line of Sight and Placement
Ensure that the Vivi device has a clear line of sight to the access point (AP). Avoid placing the device behind objects, such as TVs or furniture, that may obstruct the wireless signal.
Consider repositioning the Vivi device to a location that provides direct visibility to the AP, minimising obstructions and improving signal reception.
Reduce Interference and Noise
Minimise sources of interference and noise in the classroom environment that can degrade the wireless signal.
Keep Vivi devices away from other electronic equipment, such as microwave ovens or cordless phones, that can cause signal interference.
Avoid placing Vivi devices near walls or metal objects that may reflect or block the Wi-Fi signal.
Regular Maintenance and Monitoring
Continuously monitor the performance of Vivi devices using Vivi Central's analysis tools to identify any fluctuations in SNR or signal strength.
Conduct periodic site surveys to assess coverage, identify dead zones, and make necessary adjustments to optimise the Wi-Fi environment.
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