Input interface

The input interface is the main parameter of a switch, which refers to the input interface method and number of interfaces. The switch generally has 4, 8, or 32 or more input interfaces, using BNC plugs or composite video interfaces. But for a matrix switcher, it selects two or more signal sources from multiple sources to output to different display devices. So matrix switchers have multiple input interfaces and multiple output interfaces. At the same time, it has more interface methods such as RS-323 interface, serial port, 8-way D-type 15 pin+RS232 control input, RCA interface, 9-pin COM connection port, etc.

Output interface

The output interface refers to the output interface method of the switch, usually BNC plug or composite video interface. For matrix switchers, they have multiple input interfaces and multiple output interfaces because they select two or more signal sources to output to different display devices.

bandwidth

Bandwidth, also known as bandwidth, refers to the amount of data that can be transmitted at a fixed time, that is, the ability to transmit data in a transmission pipeline. In digital devices, bandwidth is usually expressed in bps, bit per second, which is the number of bits that can be transmitted per second. In analog devices, bandwidth is usually expressed in transmission cycles per second or Hertz Hz. Bandwidth is particularly important for basic input output system (BIOS) devices, such as fast disk drives that are hindered by low-frequency wide buses.

control mode 

The control method refers to the operational form of the matrix switcher. There are generally the following control forms: panel manual control, RS-232 control, remote keyboard (optional), etc.

Input impedance

Impedance is the resistance of a circuit or device to AC current, and input impedance is measured at the inlet. High input impedance can reduce signal changes during circuit connections, making it the most ideal choice. The minimum impedance at a given voltage is the minimum input impedance. As an alternative or supplement to input current, it determines the input power requirements.

Output impedance

Impedance is the resistance of a circuit or device to AC current, and the output impedance is measured at the outlet. The smaller the impedance, the higher the ability to drive larger loads.

Input level

The input level refers to the type of level signal received by a matrix switch and generated by a digital circuit. The commonly used method in circuit analysis is to equate the signal transmission circuit to a four terminal network. Measuring the variation of a signal during transmission can be expressed as the value of the increase or decrease in signal power, with the basic unit being watts (W). But it is more widely represented by level. The definition of voltage level is the logarithmic value of the power ratio between the network output and input. Represented by P, P=lg P2/P1, measured in Bell (B).

Output level

The output level refers to the level signal of the output signal of the matrix switch. The TTL level signal is most commonly used here because data representation typically uses binary rules, where+5V is equivalent to logic "1" and 0V is equivalent to logic "0". This is called the TTL (Transistor Transistor Logic Level) signal system, which is a standard technique for communication between various parts of a computer processor controlled device.

TTL level signals are ideal for data transmission within devices controlled by computer processors. Firstly, data transmission within devices controlled by computer processors does not require high power supply requirements and low heat loss. Additionally, TTL level signals are directly connected to integrated circuits without the need for expensive line drivers and receiver circuits; Furthermore, the internal data transmission of devices controlled by computer processors is carried out at high speeds, and the operation of the TTL interface can precisely meet this requirement. In most cases, TTL communication uses parallel data transmission, which is not suitable for distances exceeding 10 feet. This is due to both reliability and cost considerations. Because there are issues of phase bias and asymmetry in parallel interfaces, which have an impact on reliability; In addition, for parallel data transmission, the cost of cables and connectors is also higher than that of serial communication methods.

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