BNC interface optical module for 12G-SDI

Abstract

The utility model relates to the technical field of optical modules, in particular to a BNC interface optical module for 12G-SDI, and the electric port side of the optical module is connected with a BNC connector; the output side of the BNC connector is connected to the optical module transmitter, the optical module transmitter comprises a self-adaptive equalizer, a transmitting clock data recovery unit, a driving circuit and an optical transmitting end which are connected in sequence, and the optical transmitting end is connected to the optical module receiver through an optical cable; the output side of the optical module receiver is connected to the input side of the BNC connector, and the optical module receiver comprises an optical receiving end, an amplifier, a received clock data recovery unit and a cable driver which are connected in sequence. And the optical fiber connection of the ST interface is adopted at the optical port side of the optical module, so that the transmission distance is prolonged to 10km from 75m of a radio frequency coaxial cable.

Description

Technical Field

[0001] The utility model relates to the technical field of optical modules, and in particular to a BNC interface optical module for 12G-SDI. Background Art

[0002] 12G-SDI is a standard for transmitting high-resolution video signals. It is widely used in broadcasting, video production and high-performance video display systems due to its high transmission quality, good real-time performance and low latency.

[0003] Although traditional copper cable transmission is reliable, it has problems such as severe attenuation, bandwidth limitation and susceptibility to electromagnetic interference in long-distance transmission. In order to solve these problems, optical fiber transmission technology came into being, which has the advantages of low attenuation, large bandwidth and anti-electromagnetic interference.

[0004] In the prior art, optical modules are mainly divided into different packaging forms such as SFP+ and XFP, which are used to transmit signals of different speeds and distances. However, optical modules in traditional packaging forms must rely on optical terminals, which greatly reduces the flexibility of on-site wiring. Utility Model Content

[0005] The purpose of the utility model is to provide a BNC interface optical module for 12G-SDI, which improves the transmission skills of the optical module by using clock data recovery technology, adaptive equalization technology, and cable driving technology, and adopts ST interface optical fiber connection on the optical port side of the optical module, so as to extend the transmission distance from 75m of RF coaxial cable to 10km, so as to solve the problems pointed out in the background technology.

[0006] The embodiment of the utility model is implemented by the following technical solution z: a BNC interface optical module for 12G-SDI, the electrical port side of the optical module is connected to the BNC connector;

[0007] The output side of the BNC connector is connected to an optical module transmitter, which includes an adaptive equalizer, a transmission clock data recovery unit, a driving circuit and an optical transmitter connected in sequence, and the optical transmitter is connected to an optical module receiver through an optical cable;

[0008] The output side of the optical module receiver is connected to the input side of the BNC connector, and the optical module receiver includes an optical receiving end, an amplifier, a receiving clock data recovery unit, and a cable driver which are connected in sequence.

[0009] According to a preferred embodiment, the BNC connector adopts a standard BNC soldering male connector.

[0010] According to a preferred implementation, the optical port side of the optical module is connected to the ST interface.

[0011] According to a preferred embodiment, the optical module includes a shell, a control board and a radio frequency board built in the shell, and a power supply and communication interface connected to the rear end of the shell, the BNC connector is connected to the front end of the shell, and the adaptive equalizer, the transmission clock data recovery unit, the drive circuit, the optical transmitter, the optical receiver, the amplifier, the receiving clock data recovery unit and the cable driver are configured on the radio frequency board.

[0012] According to a preferred embodiment, the shell is composed of a structural upper cover and a structural lower cover, and the structural upper cover and the structural lower cover constitute a closed shell, the control board is arranged at the upper end of the RF board and connected to the RF board, and the power supply and communication interface passes through the structural upper cover and is connected to the control board.

[0013] According to a preferred embodiment, it further comprises a dust cover, wherein the dust cover is adapted to the rear end of the ST interface optical device.

[0014] According to a preferred embodiment, the dust cover is connected to the upper cover of the structural member.

[0015] The technical solution of the BNC interface optical module for 12G-SDI provided in the embodiment of the utility model has at least the following advantages and beneficial effects: the utility model improves the transmission skills of the optical module by using clock data recovery technology, adaptive equalization technology and cable driving technology, and adopts ST interface optical fiber connection on the optical port side of the optical module, thereby extending the transmission distance from 75m of the RF coaxial cable to 10km. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a BNC interface optical module for 12G-SDI provided in Example 1 of the utility model;

[0017] Figure 2 A schematic diagram of the structure of a BNC interface optical module for 12G-SDI provided in Example 1 of the utility model;

[0018] Icons: 1-adaptive equalizer, 2-transmitting clock data recovery unit, 3-driving circuit, 4-optical transmitter, 5-optical receiver, 6-amplifier, 7-receiving clock data recovery unit, 8-cable driver, 9-structural upper cover, 10-structural lower cover, 11-control board, 12-RF board, 13-power supply / communication interface, 14-ST interface, 15-dust cover, 16-BNC connector. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Example 1

[0021] See also Figure 1 As shown, an embodiment of the utility model provides a BNC interface optical module for 12G-SDI, which can replace the BNC cable or extend its transmission distance; the electrical port side of the optical module is connected to the BNC connector 16 to achieve seamless compatibility with existing BNC interface devices.

[0022] The input side of the BNC connector 16 is connected to a 12G-SDI signal source; it should be noted that 12G-SDI (12Gbps Serial Digital Interface) is a high-bandwidth video transmission standard, mainly used for ultra-high-definition video applications. It supports resolutions up to 4Kp60 and data transmission rates of 12000Mbit / s, which is 8 times the bandwidth of ordinary HD-SDI.

[0023] Furthermore, the output side of the BNC connector 16 is connected to an optical module transmitter, which includes an adaptive equalizer 1, a transmission clock data recovery unit 2, a driving circuit 3 and an optical transmitter 4 connected in sequence, and the optical transmitter 4 is connected to an optical module receiver via an optical cable.

[0024] Among them, the adaptive equalizer 1 is used to compensate for the line loss of the coaxial cable to ensure that the optical module is adaptable to copper cables of various lengths; the transmitting clock data recovery unit 2 is used to recover and shape the signal of the optical module generator to improve the transmission performance of the optical module. The transmission performance of the optical module can be improved by using CDR technology, and the adaptive equalizer 1 and the cable driver 8 are adapted to ensure that the optical module adapts to various system losses; the optical transmitting end 4 is responsible for converting electrical signals into optical signals and transmitting them; the output side of the optical module receiver is connected to the input side of the BNC connector 16, and the optical module receiver includes an optical receiving end 5, an amplifier 6, a receiving clock data recovery unit 7 and a cable driver 8 connected in sequence; among them, the amplifier 6 is used to enhance the strength of the optical signal, the receiving clock data recovery unit 7 is used to recover and shape the signal of the optical module generator, and the cable driver 8 is used to compensate for the line loss of the coaxial cable.

[0025] More specifically, the BNC connector uses a standard BNC soldering male head, which can be directly connected to a conventional female BNC cable or device; the optical port side of the optical module is connected to the ST interface 14, and a 4-core cable is used to provide power supply and communication management.

[0026] In one possible implementation, see Figure 2 As shown, the optical module includes a shell, a control board 11 and a radio frequency board 12 built into the shell, and a power supply and communication interface connected to the rear end of the shell. The control board 11 provides a communication interface and optical module diagnostic information, the radio frequency board 12 carries a high-speed signal path, and the shell is used to protect the internal circuit of the optical module.

[0027] More specifically, the BNC connector 16 is connected to the front end of the housing; the adaptive equalizer 1, the transmitting clock data recovery unit 2, the driving circuit 3, the optical transmitting end 4, the optical receiving end 5, the amplifier 6, the receiving clock data recovery unit 7 and the cable driver 8 are arranged on the radio frequency board 12. Preferably, the housing is composed of a structural upper cover 9 and a structural lower cover 10, and the structural upper cover 9 and the structural lower cover 10 form a closed housing, the control board 11 is arranged on the upper end of the radio frequency board 12 and connected to the radio frequency board 12 to control the radio frequency board 12, and the power supply and communication interface penetrate the structural upper cover 9 and are connected to the control board 11; the control board 11 and the radio frequency board 12 of the optical module can be protected by the structural upper cover 9 and the structural lower cover 10.

[0028] More specifically, the optical module further includes a dust cover 15, which is adapted to the rear end of the ST interface 14 optical device and connected to the structural component upper cover 9 through a connecting chain to protect the optical port side of the optical module.

[0029] In summary, the technical solution of the BNC interface optical module for 12G-SDI provided by the embodiment of the utility model has at least the following advantages and beneficial effects: the utility model improves the transmission skills of the optical module by using clock data recovery technology, adaptive equalization technology and cable driving technology, and adopts the optical fiber connection of ST interface 14 on the optical port side of the optical module, thereby extending the transmission distance from 75m of the RF coaxial cable to 10km.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A BNC interface optical module for 12G-SDI, characterized in that: The electrical port side of the optical module is connected to a BNC connector (16); The output side of the BNC connector (16) is connected to an optical module transmitter, the optical module transmitter comprises an adaptive equalizer (1), a transmission clock data recovery unit (2), a driving circuit (3) and an optical transmitter (4) connected in sequence, and the optical transmitter (4) is connected to an optical module receiver via an optical cable; The output side of the optical module receiver is connected to the input side of the BNC connector (16), and the optical module receiver comprises an optical receiving end (5), an amplifier (6), a receiving clock data recovery unit (7) and a cable driver (8) which are connected in sequence.

2. The BNC interface optical module for 12G-SDI according to claim 1, characterized in that: The BNC connector adopts a BNC welding male head.

3. The BNC interface optical module for 12G-SDI according to claim 1, characterized in that: The optical port side of the optical module is connected to the ST interface (14).

4. The BNC interface optical module for 12G-SDI according to claim 1, characterized in that: The optical module comprises a housing, a control board (11) and a radio frequency board (12) built in the housing, and a power supply and communication interface connected to the rear end of the housing; the BNC connector (16) is connected to the front end of the housing; the adaptive equalizer (1), the transmission clock data recovery unit (2), the drive circuit (3), the optical transmission end (4), the optical receiving end (5), the amplifier (6), the reception clock data recovery unit (7) and the cable driver (8) are arranged on the radio frequency board (12).

5. The BNC interface optical module for 12G-SDI according to claim 4, characterized in that: The shell is composed of a structural upper cover (9) and a structural lower cover (10), and the structural upper cover (9) and the structural lower cover (10) form a closed shell. The control board (11) is arranged on the upper end of the radio frequency board (12) and is connected to the radio frequency board (12). The power supply and communication interface passes through the structural upper cover (9) and is connected to the control board (11).

6. The BNC interface optical module for 12G-SDI according to claim 5, characterized in that: It also comprises a dust cover (15), wherein the dust cover (15) is adapted to the rear end of the ST interface (14) optical device.

7. The BNC interface optical module for 12G-SDI according to claim 6, characterized in that: The dust cover (15) is connected to the structural member upper cover (9).

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