Balanced XLR 8×8 Audio Matrix Switch from LinkBone is a perfect choice for switching analog audio or digital signals. It contains a collection of passive switches arranged in 8×8 relay matrix configuration. All 16 balanced XLR ports are biridectional. Meaning that each port can be used as a signal input or output.
The user can control the state of each relay switch individually by a touch screen on device front panel or Infrared remote control. For remote applications the device can be controlled via Ethernet or RS-232 serial interface.
Passive Audio Matrix Switch internal relay switching network
The architecture of LinkBone Matrix internal switching network is shown on figure 1. The device includes 64 passive relay switches with gold plated contacts for ensuring high signal quality. The state of matrix internal relay switches does not change after interruption or disconnection of power supply.
Figure 1: Relay Matrix interconnection diagram.
The typical matrix signal bandwith is 50Mhz which is far above standard 20Khz audio spectrum. This means that switch can be used for standard audio and for high frequency signal switching(e.g. Video). Figure 2 shows 10Mhz square waveform signal routed through 8×8 relay Matrix switch. The blue waveform represents original signal. The yellow waveform shows signal routed via 8×8 XLR Audio Matrix.
Figure 2: 10Mhz square waveform signal routed through 8×8 Relay Matrix Switch
Additional benefit of using passive relay matrix switches is wide range of acceptable signal amplitudes and low signal distortion. The LinkBone switches accept +/- 24V signals. The maximum current rating of each signal patch is 1.5A.
8×8 XLR Audio Matrix Switch remote control
Figure 3: LinkBone Audio Matrix switch remote interfaces
LinkBone 8×8 XLR Audio Matrix can be controlled remotely via telnet or serial text commands. The set of commands can be used for automatic matrix configuration via a configuraiton scripts. The text commands are described in chapter 7 of LinkBone 8×8 Matrix Switch user manual.
Figure 4: 8×8 XLR Matrix Switch remote control HTTP interface.
The user can control the matrix also via visual HTTP interface shown on figure 4. The state of each relay switch can be changed by setting checkboxes representing internal switching network. After clicking apply button the matrix switch changes it state.
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