Multi-in-one coaxial switch switcher of low-power broadcast transmitter
By integrating multiple coaxial switches and control boards, a multi-coaxial switch for low-power broadcast transmitters has been developed, solving the problems of difficult installation and complex control of coaxial switches, and achieving efficient, reliable and systematic switching control of multiple transmitters.
Patent Information
- Application Number
- CN202423149731.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-19
AI Technical Summary
Because the low-power broadcast transmitter has nowhere to install and fix the coaxial switch, and the radio frequency cables and control wiring are messy, it cannot achieve remote control and automatic switching, resulting in system instability and the inability to build an N+1 system.
Design a multi-coaxial switch for low-power broadcast transmitters, including multiple coaxial switches, a switching power supply module, a chassis, a control board, a dummy load, and an interface board, all integrated in a 19-inch 2U standard chassis. It supports switching control of multiple transmitters and is equipped with a display board and interlocking functions to achieve systematic and reliable switching.
It enables efficient switching control between multiple transmitters, reduces the wiring of coaxial switches, has complete interlocking and display functions, supports different system controllers, is highly adaptable, and ensures the reliability and flexibility of switching.
Smart Images
Figure CN223502853U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transmitter switching technology, and more specifically, to a multi-functional coaxial switch for a low-power broadcast transmitter. Background Technology
[0002] Low-power broadcast transmitters, such as 50W, 100W, 300W, and 500W transmitters for terrestrial digital television broadcasting, and 50W, 100W, 300W, 500W, and 1kW transmitters for FM broadcasting, are often used simultaneously by multiple transmitters on the same transmitter station. Due to limited space in the equipment room, several of these low-power transmitters are usually installed in the same standard cabinet.
[0003] Currently, it's common to need multiple main transmitters sharing a single backup unit to form an N+1 system. This presents a significant challenge: the number of coaxial switchers corresponds to the number of main transmitters. The lack of suitable installation and mounting locations for these switches, along with the numerous and messy RF cables and control wiring, poses a major problem. Currently, even with low-power transmitters, the lack of installation and mounting locations for coaxial switchers and the numerous and messy RF cables and control wiring have prevented the construction of N+1 systems. A few stations use inexpensive, unreliable, manually operated coaxial switches. These switches often have poor contact, and after repeated rotations, excessive standing waves can occur, leading to instability. Furthermore, they cannot form a remotely controlled and automatically switching 1+1 system, so their use is rare. Some stations also use low-to-medium power coaxial switches to form 1+1 systems. Since low-power broadcast transmitters are often integrated units, the switches can only be placed on top of the machine, resulting in an unsightly and unusable layout. This also prevents the construction of a remotely controlled and automatically switching 1+1 system, making it impossible to build an N+1 system with multiple transmitters.
[0004] Therefore, it is necessary to design a coaxial switch that is easier to install, more systematically controlled, and more reliable for the transmitter system. Utility Model Content
[0005] The purpose of this invention is to provide a multi-functional coaxial switch for low-power broadcast transmitters, which is easy to install, provides more systematic control, and is more reliable when switching control is applied to the transmitter.
[0006] This utility model is achieved through the following technical solution:
[0007] A multi-coaxial switch for a low-power broadcast transmitter includes multiple coaxial switches, a switching power supply module, a chassis, a control board, a dummy load, and an interface board.
[0008] The coaxial switches, the dummy load, and the control board are disposed inside the chassis, and the interface board is disposed on the surface of the chassis.
[0009] The switching power supply module is installed inside the chassis, and the switching power supply module serves as the power supply terminal for the coaxial switch and the control board.
[0010] The coaxial switches are cascaded in sequence. Each coaxial switch can be detachably connected to an antenna and a transmitter. The coaxial switches at both ends of the cascade can be detachably connected to the dummy load and the backup transmitter, respectively. The switching signal receiving end of the coaxial switch is detachably connected to the system controller, and the connection ends of the coaxial switch and the dummy load are both located on the interface board.
[0011] Preferably, the number of coaxial switches is four.
[0012] Preferably, the interface board is provided with four coaxial switch connection terminals, a dummy load connection terminal, two control interfaces, two interlocking interfaces, an AC220V power input interface, and a grounding terminal.
[0013] Preferably, the chassis is a 19-inch 2U standard chassis.
[0014] Preferably, the dummy load is 200 watts.
[0015] Preferably, a 12V axial flow fan is provided at the dummy load location.
[0016] Preferably, the switching power supply module includes a 12V switching power supply module and a 24V switching power supply module;
[0017] The 24V switching power supply module supplies power to the coaxial switch, and the 12V switching power supply module is the power supply terminal for the control board.
[0018] Preferably, a display panel is also provided on the surface of the chassis.
[0019] The technical solution of this utility model has at least the following advantages and beneficial effects:
[0020] This utility model integrates multiple coaxial switches, enabling efficient and systematic switching control between multiple transmitter main units and backup units;
[0021] The interface board of this utility model is equipped with a variety of interfaces and has a complete interlocking function. It can maintain conduction when the antenna is connected to the main unit or the backup unit, and can also maintain conduction when the power supply to the switch is cut off or the switching power supply fails. It will not cause the transmitter connected to the antenna to stop due to the interlock being disconnected due to power failure.
[0022] This invention solves the defect of existing standby interlocking technology that cannot use series connection and has to use parallel connection;
[0023] This utility model is equipped with a display panel, which can intuitively display the status of the main transmitter, the backup transmitter, the antenna, and the load, helping operators to understand the current status;
[0024] The switcher of this invention is an independent component, which can easily adapt to different communication protocols and use different system controllers, thus having stronger adaptability and being easy to promote. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the principle of the low-power broadcast transmitter multi-coaxial switch switch provided in Embodiment 1 of this utility model;
[0026] Figure 2 A connection diagram of a coaxial switch provided in Embodiment 1 of this utility model;
[0027] Figure 3 This is a schematic diagram of the structure of the low-power broadcast transmitter multi-function coaxial switch switch provided in Embodiment 1 of this utility model;
[0028] Figure 4 This is a schematic diagram of the front panel of the chassis provided in Embodiment 1 of this utility model;
[0029] Figure 5 A schematic diagram of the rear panel of the chassis provided in Embodiment 1 of this utility model;
[0030] Icons: 101-Coaxial switch, 102-Coaxial switch control board, 103-24V switching power supply module, 104-12V switching power supply module, 105-Display board, 106-Dummy load, 107-12V axial fan. Detailed Implementation
[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0032] Example 1
[0033] This embodiment provides a multi-function coaxial switch for a low-power broadcast transmitter.
[0034] Includes multiple coaxial switches, switching power supply modules, chassis, control board, dummy loads, and interface boards;
[0035] The coaxial switches, the dummy load, and the control board are disposed inside the chassis, and the interface board is disposed on the surface of the chassis.
[0036] The switching power supply module is installed inside the chassis, and the switching power supply module serves as the power supply terminal for the coaxial switch and the control board.
[0037] The coaxial switches are cascaded in sequence. Each coaxial switch can be detachably connected to an antenna and a transmitter. The coaxial switches at both ends of the cascade can be detachably connected to the dummy load and the backup transmitter, respectively. The switching signal receiving end of the coaxial switch is detachably connected to the system controller, and the connection ends of the coaxial switch and the dummy load are both located on the interface board.
[0038] In a preferred embodiment, the number of coaxial switches is four.
[0039] In a conventional design, the four terminals of the electric coaxial switch can be connected sequentially to the antenna, main transmitter, dummy load, and backup transmitter. An example of the coaxial switch connection method in this embodiment can be found in [reference needed]. Figure 2 Coaxial switches 1, 2, 3, and 4 are four coaxial switches in this embodiment, connected to the N+1 system controller and transmitters via an interface board. The connected transmitters include transmitter 1, transmitter 2, transmitter 3, and a backup transmitter. Specifically, the first connection terminals of coaxial switches 1, 2, 3, and 4 are connected to antennas 1, 2, 3, and 4 respectively; the third connection terminal of coaxial switch 1 is connected to a dummy load; the second connection terminal of coaxial switch 1 is connected to the third connection terminal of coaxial switch 2; the second connection terminal of coaxial switch 2 is connected to the third connection terminal of coaxial switch 3; the second connection terminal of coaxial switch 3 is connected to the third connection terminal of coaxial switch 4; the second connection terminal of coaxial switch 4 is connected to the backup transmitter; and the fourth connection terminals of coaxial switches 1, 2, 3, and 4 are connected to transmitters 1, 2, 3, and 4 respectively.
[0040] Furthermore, the interface board is equipped with four coaxial switch connection terminals, a dummy load connection terminal, two control interfaces, two interlocking interfaces, an AC220V power input interface, and a grounding terminal. Since all the connection terminals for the internal components are located on the interface board, external connection and disassembly are convenient and simple, facilitating the application of the entire device to various scenarios.
[0041] In this embodiment, the chassis is a 19-inch 2U standard chassis, which can be directly installed on a general standard server rack.
[0042] Furthermore, the dummy load is specified as 200 watts.
[0043] Furthermore, a 12V axial fan is provided at the dummy load location, mainly for heat dissipation of the dummy load. It can be set to be activated by temperature triggering, for example, by triggering a relay after the temperature sensor detects that the temperature has reached 40 degrees Celsius.
[0044] It should be noted that the circuit board implements the interlocking function of the main and backup transmitters and the load.
[0045] On the other hand, the switching power supply module includes a 12V switching power supply module and a 24V switching power supply module; the 24V switching power supply module supplies power to the coaxial switch, and the 12V switching power supply module is the power supply terminal of the interface board, which can supply power to, for example, a 12V axial flow fan, or supply power to external devices.
[0046] Finally, a display panel is preferably provided on the surface of the chassis to visually display the status of the transmitter, standby switch to the antenna, and load.
[0047] The schematic diagram of this embodiment can be referred to. Figure 1 A structural diagram of the interface board can be found in [reference needed]. Figure 3 The coaxial switch 101, dummy load 106 and 12V axial fan 107 can be installed inside the chassis, while the coaxial switch control board 102, 24V switching power supply module 103, 12V switching power supply module 104 and display board 105 can all be installed on the surface.
[0048] The display surface of the display panel 105 can be located on the front panel. Figure 4 This is a schematic diagram of the front panel of the chassis. Multiple indicator lights are set here for indication. For example, when transmitter 1, transmitter 2, transmitter 3, or transmitter 4 switches to the antenna, the corresponding green light on the antenna row of the panel lights up. When the backup transmitter switches to the dummy load, the green light on the backup transmitter's load row lights up. When one of the main transmitters, transmitter 1, transmitter 2, transmitter 3, or transmitter 4 switches to the load, the corresponding green or red light on the load row of the panel lights up. When the backup transmitter replaces the main transmitter and switches to the antenna, the corresponding red light on the backup transmitter's antenna row lights up.
[0049] The connection plate can be installed on the rear panel of the chassis. Figure 5 This is a schematic diagram of the rear panel of the chassis. The rear panel includes four connection terminals for coaxial switches 1, 2, 3, and 4: "Main Unit," "Backup Unit," "Antenna," and "Load," respectively; a dummy load connection terminal; two control interfaces (defined in Tables 1-2); two interlock interfaces (defined in Tables 3-4); an AC220V power input interface; and a grounding terminal. The "Main Unit" connection terminal is the fourth connection terminal mentioned earlier, the "Antenna" connection terminal is the first connection terminal mentioned earlier, the "Backup Unit" connection terminal is the second connection terminal mentioned earlier, and the "Load" connection terminal is the third connection terminal mentioned earlier.
[0050] Table 1 Pin Definitions for Control Interface 1
[0051]
[0052]
[0053] Table 2 Pin Definitions for Control Interface 2
[0054] 1 foot Coaxial switch 3 switches the host to the antenna 8 legs Coaxial switch 4 switches the host to the antenna 2 feet Coaxial switch 3-way switch from standby unit to antenna 9 feet Coaxial switch 4-way switch from standby unit to antenna 3-legged Coaxial switch 3 common pin GND 10 feet Coaxial switch 4 common pin GND 4 legs NC 11 feet NC 5 feet NC 12 feet NC 6 feet Coaxial switch 3 Main unit to antenna status indicator 13 feet Coaxial switch 4 Main unit to antenna status indicator 7 feet Coaxial switch 3 standby to antenna status indication 14 feet Coaxial switch 4 Standby to antenna status indication
[0055] Table 3 Pin Definitions of Interlocking Interface 1
[0056] 1 foot Transmitter 1 Interlock A1 8 legs Transmitter 2 interlock B1 2 feet Transmitter 1 Interlock A2 9 feet Transmitter 2 interlock B2 3-legged Transmitter 1 Interlock B1 10 feet 4 legs Transmitter 1 Interlock B2 11 feet Transmitter 3-interlock A1 5 feet NC 12 feet Transmitter 3-interlock A2 6 feet Transmitter 2 Interlock A1 13 feet Transmitter 3-interlock B1 7 feet Transmitter 2 Interlock A2 14 feet Transmitter 3-interlock B2
[0057] Table 4 Pin Definitions of Interlocking Interface 2
[0058]
[0059]
[0060] Based on the solution of this embodiment, the connection method does not require additional space or mounting components, and also reduces the wiring of the coaxial switches. It integrates four coaxial switches, enabling switching between the transmitters of four main units and the transmitters of the backup unit. Multiple devices of this embodiment can also be cascaded. For example, two cascaded units can switch between the transmitters of five main units, or up to eight main units, and the transmitters of the backup unit. This embodiment also has an interlocking interface for each transmitter, thus providing complete interlocking functionality. When the antenna is connected to either the main unit's or the backup unit's transmitter, the interlock remains active, and it remains active even when the power supply to the coaxial switch is interrupted or the switching power supply fails, preventing the interlock from disconnecting due to a power failure and causing the transmitter connected to the antenna to stop. This embodiment uses an N+1 system controller for switching. When the power supply to the multi-in-one coaxial switch is interrupted or the switching power supply fails, the coaxial switches remain in their original positions and do not switch, while the interlocking contacts remain active. The transmitter of the host computer is interlocked to conduct when switching to a load, eliminating the need for the alternating conduction required in traditional solutions. This allows the transmitter to operate smoothly when switching to a load, facilitating monitoring of its operational status and maintenance. Finally, the multi-in-one coaxial switch in this embodiment is independently integrated and connected to the system controller, without limiting the type of system controller or communication protocol, thus offering greater application flexibility and a wider range of applicable scenarios.
[0061] Based on the above, this embodiment solves the defects caused by the traditional solution of using parallel connection instead of series connection, and the switching is efficient and reliable, more flexible and adaptable.
[0062] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A multi-functional coaxial switch for a low-power broadcast transmitter, characterized in that, It includes multiple coaxial switches, switching power supply modules, a chassis, dummy loads, control boards, and interface boards; The coaxial switches, the dummy load, and the control board are disposed inside the chassis, and the interface board is disposed on the surface of the chassis. The switching power supply module is installed inside the chassis, and the switching power supply module serves as the power supply terminal for the coaxial switch and the control board. The coaxial switches are cascaded in sequence. Each coaxial switch can be detachably connected to an antenna and a transmitter. The coaxial switches at both ends of the cascade can be detachably connected to the dummy load and the backup transmitter, respectively. The switching signal receiving end of the coaxial switch is detachably connected to the system controller, and the connection ends of the coaxial switch and the dummy load are both located on the interface board.
2. The multi-coaxial switch for a low-power broadcast transmitter according to claim 1, characterized in that, The number of coaxial switches is four.
3. A multi-coaxial switch for a low-power broadcast transmitter according to claim 2, characterized in that, The interface board is equipped with four coaxial switch connection terminals, a dummy load connection terminal, two control interfaces, two interlocking interfaces, an AC220V power input interface, and a grounding terminal.
4. A multi-coaxial switch for a low-power broadcast transmitter according to claim 1, characterized in that, The chassis is a 19-inch 2U standard chassis.
5. A multi-coaxial switch for a low-power broadcast transmitter according to claim 1, characterized in that, The dummy load is specified as 200 watts.
6. A multi-coaxial switch for a low-power broadcast transmitter according to claim 5, characterized in that, A 12V axial flow fan is installed at the dummy load location.
7. A multi-coaxial switch for a low-power broadcast transmitter according to claim 1, characterized in that, The switching power supply module includes a 12V switching power supply module and a 24V switching power supply module; The 24V switching power supply module supplies power to the coaxial switch, and the 12V switching power supply module is the power supply terminal of the interface board.
8. A multi-coaxial switch for a low-power broadcast transmitter according to claim 1, characterized in that, A display panel is also provided on the surface of the chassis.