TIP: In addition to the improved image quality that digital sources provide, they

are also more efficient on encoding. This is because analog sources invariably

contain a certain amount of noise and this can add to the overall content of

the data stream. In addition, analog sources may produce contouring effects during motion.

•Network Bandwidth — This is the total volume of data that can be handled by the network at any given time. If you have a high bandwidth network and only one

QGE 100, it is unlikely that you will experience any problems. However, in extreme circumstances, if you have a low bandwidth network, a network with heavy traffic, or you are using several QGEs, you may find that the available bandwidth is insufficient to cope during peak demand. It is important to note that the network is only as good as its weakest link. For example, if you have a 100BASE-T network with a 10BASE-T router, the effective bandwidth could be much less than expected.

•Data Decoding – Whatever viewing platform you are using (in other words, whether the QGE 100 running on a computer or a Quantum Elite processor) the efficiency with which the data stream is decoded largely depends on the capacity of the central processing unit (CPU). As with the encoding process, the decoder can choose to reduce the refresh rate.

The most likely cause of a bottleneck here is placing too much demand on the CPU, so that it cannot decode the QGE data stream quickly enough.

•If you are using the QGE 100 Viewer, the CPU of the computer should be as fast as possible. Also, remember that running other applications at the same time as the Viewer creates extra demand for the CPU.

•If you are using a Quantum processor, remember that the number of sources it is displaying plus the content of those sources impacts how much work the CPU has to do.

•Sources that are scaled up or down (rather than being viewed at their native resolutions) require more CPU time (see “Source scaling”).

Source scaling

For optimal viewing, it is preferable to display a source at its native resolution (that is, unity, not scaled). This results in the viewed source being a pixel-for-pixel copy of the original, which keeps processing to a minimum and ensures the best possible image quality.

Scaling a source requires each pixel value to be recalculated and, consequently, places a high demand on the CPU. This can lead to increased latency and reduced refresh rates as described above. In addition, since each pixel is recalculated, the image may not appear as sharp as the original. This becomes more noticeable as the image gets smaller, especially if the image contains fine detail.

QGE 100 • Reference Information

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Extron electronic QGE 100 manual Source scaling
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QGE 100 specifications

The Extron QGE 100 is a high-performance network switch engineered specifically for AV system integration. With its advanced capabilities, this device plays a crucial role in managing AV data traffic, ensuring reliable performance and efficiency in various settings such as corporate environments, educational institutions, and healthcare facilities.

One of the key features of the QGE 100 is its support for Power over Ethernet (PoE). This allows the switch to deliver both data and power to connected devices over a single Ethernet cable, simplifying installations and reducing the need for additional power sources. This is particularly beneficial for devices like IP cameras, wireless access points, and AV devices in scenarios where accessibility to power outlets may be limited.

The QGE 100 also provides a robust Layer 2 switching functionality, which is essential for managing data flow within the network. Its capability to handle multiple VLANs ensures that AV traffic can be segregated effectively, thus improving network performance and security. The switch features IGMP Snooping, a protocol that optimizes multicast traffic management, ensuring that video streams reach the intended recipients without unnecessary bandwidth consumption.

In terms of connectivity, the Extron QGE 100 is equipped with multiple Gigabit Ethernet ports, facilitating high-speed data transmission for AV content. The switch's user-friendly management interface allows for straightforward configuration, monitoring, and troubleshooting, streamlining operations across AV environments. Additionally, it supports link aggregation, enhancing bandwidth and redundancy when connecting multiple devices.

The QGE 100 is also designed with reliability in mind, featuring a fanless operation that minimizes noise and ensures a long lifespan. Its compact form factor allows for easy rack mounting in equipment racks, maintaining a clean and organized setup.

Another vital characteristic of the QGE 100 is its compatibility with Extron's comprehensive suite of AV control and management products. This integration capability provides users with a cohesive solution for managing their AV systems, further enhancing the overall user experience.

In conclusion, the Extron QGE 100 network switch is an essential tool for any AV system requiring efficient connectivity, power delivery, and data management. Its sophisticated features and technologies make it a valuable asset in modern AV installations, ensuring robust performance and ease of use.
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