CN217590979U - Multi-channel synthesizer with unit switching function and wireless transmitting system - Google Patents
Multi-channel synthesizer with unit switching function and wireless transmitting system Download PDFInfo
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- CN217590979U CN217590979U CN202122312090.6U CN202122312090U CN217590979U CN 217590979 U CN217590979 U CN 217590979U CN 202122312090 U CN202122312090 U CN 202122312090U CN 217590979 U CN217590979 U CN 217590979U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses a multi-channel synthesizer with unit switching function, which is formed by cascading a plurality of synthesizer units provided with switching units; the utility model also discloses a wireless transmitting system, which comprises a transmitter power detecting unit, a control unit, a multi-channel synthesizer with unit switching function and a plurality of transmitters; the transmitter power detection unit is used for detecting the power signal abnormality of the frequency when a certain transmitter or a certain synthesizer unit in the system is in failure; the control unit is used for switching the synthesizer unit corresponding to the fault frequency through the switching unit according to the power signal abnormity of the frequency detected by the transmitter power detection unit, and disconnecting the transmitter or the synthesizer unit with the fault from the whole system.
Description
Technical Field
The utility model belongs to electronic information/radio frequency/broadcast television passive device field, concretely relates to take multichannel synthesizer and wireless transmitting system of unit switching function.
Background
The multichannel synthesizer is also called multiplexer, and is the core equipment for synthesizing the output power of several broadcast or television transmitters with different frequencies and using a broadband antenna feeder system to make transmission. The multi-channel synthesizer is applied to the wireless transmitting system, so that tower top resources can be greatly saved, the system cost is reduced, the coverage gain is improved, and the stability and the expandability of the wireless transmitting system are improved. At present, multi-channel synthesizers are used in more and more broadcast television transmission systems.
A multichannel synthesizer is generally formed by cascading a plurality of synthesizer units, and the synthesizer units may be divided into bridge (or called constant impedance type) units, star (or called star point type) units, delay line (or called phase sensitive type) units, etc. according to their structures. Due to the outstanding characteristics of excellent isolation, full power temperature rise index, broadband characteristic of a narrow-band input port, expandability of a synthesizer and the like, the multi-channel synthesizer with the structure is increasingly applied to a radio transmission system of the broadcast television. Fig. 1 shows a set of bridge-type hexaplexer, which is formed by cascading 6 bridge-type synthesizer units, wherein 6 narrow-band input ports of the hexaplexer are respectively connected with 6 transmitters, and a wide-band port of the hexaplexer is used as a reserved port.
The multi-channel synthesizer is a core device in a radio transmission system for broadcast television and is directly related to the transmission of synthesized multiple frequency signals. Once a multi-channel synthesizer fails, part or all of the frequency signals synthesized by the multi-channel synthesizer can be affected, and if the multi-channel synthesizer fails to timely remove the fault, the transmission signals of multiple frequencies can be interrupted for a long time, so that a serious broadcast stop accident can be caused. Therefore, how to improve the stability and reliability of the multi-channel synthesizer and even the whole broadcast television wireless transmission system is an important issue to be considered by system constructors and operators.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: for stability and reliability that promote multichannel synthesizer and broadcast television transmitting system, the utility model provides a take multichannel synthesizer and wireless transmitting system of unit switching function.
The technical scheme is as follows: a multi-channel synthesizer with unit switching function includes a plurality of synthesizer units and a plurality of switching units, one synthesizer unit is provided with one switching unit; a plurality of synthesizer units provided with switching units are cascaded to form a multi-channel synthesizer with a unit switching function;
when a synthesizer unit fails or a transmitter connected to a synthesizer unit fails, the failed synthesizer unit or the synthesizer unit connected to the failed transmitter is disconnected from the multichannel synthesizer by the switching unit.
Furthermore, the synthesizer unit is a bridge unit, the switching unit is a co-directional coaxial switch with 4 ports, one group of ports capable of realizing connection of the co-directional coaxial switch is respectively connected with the broadband input port and the broadband output port of the bridge unit, and the other group of ports capable of realizing connection of the co-directional coaxial switch is used as a new broadband input port and a new broadband output port.
Furthermore, the synthesizer unit is a bridge unit, the switching unit comprises a first U-Link and a second U-Link, a broadband input port of the bridge unit is connected with a first port of the first U-Link, and a second port of the first U-Link is used as a new broadband input port; the output port of the bridge unit is connected with a first port of a second U-Link, and a second port of the second U-Link is used as a new output port; and the second port of the first U-Link is connected with the second port of the second U-Link to realize the switching of the synthesizer unit.
Furthermore, the synthesizer unit is a bridge unit, the switching unit is a 4-port anisotropic coaxial switch, the 4 ports of the anisotropic coaxial switch are all provided with a right-angled elbow, one group of ports capable of realizing connection of the anisotropic coaxial switch are respectively connected with the broadband input port and the broadband output port of the bridge unit, and the other group of ports capable of realizing connection of the anisotropic coaxial switch are used as a new broadband input port and a new broadband output port.
The utility model also discloses a wireless transmitting system, which comprises a multi-channel synthesizer with a unit switching function, a plurality of transmitters and a control unit; the output power of the transmitters is input into a multi-channel synthesizer with a unit switching function for power synthesis;
the multi-channel synthesizer with the unit switching function comprises a plurality of synthesizer units and a plurality of switching units, wherein one synthesizer unit is provided with one switching unit, and the synthesizer units provided with the switching units are cascaded to form the multi-channel synthesizer with the unit switching function; each switching unit is provided with an independent controller; the output power of each transmitter is input to the narrow-band input port of the corresponding switching unit;
each transmitter is internally provided with a transmitter power detection unit and a switch unit, wherein the transmitter power detection unit is used for acquiring output power data and reflected power data of the transmitter, and the switch unit is used for controlling the startup and shutdown of the transmitter;
the control unit is respectively connected with the transmitter power detection unit of each transmitter, the switch unit of each transmitter and the controller of each switching unit; the control unit is used for acquiring data of all transmitter power detection units, judging whether a transmitter with a fault or a synthesizer unit with a fault exists, if the transmitter with the fault exists, controlling all the transmitters to be powered off, controlling a controller of a switching unit connected with the transmitter/synthesizer unit with the fault to be switched, disconnecting the transmitter with the fault and the synthesizer unit from a wireless transmission system, and controlling the rest transmitters to be powered on after the transmitter with the fault is disconnected; if no fault exists, no operation is performed.
Further, the system also comprises a standby transmitter; when a certain transmitter or a certain synthesizer unit in the system has a fault, the frequency of the standby transmitter is adjusted to the fault frequency and is connected with a broadband port of the multi-channel synthesizer.
Furthermore, the synthesizer unit is a bridge unit, the switching unit is a co-directional coaxial switch with 4 ports, one group of ports capable of realizing connection of the co-directional coaxial switch is respectively connected with the broadband input port and the broadband output port of the bridge unit, and the other group of ports capable of realizing connection of the co-directional coaxial switch is used as a new broadband input port and a new broadband output port.
Furthermore, the synthesizer unit is a bridge unit, the switching unit comprises a first U-Link and a second U-Link, a broadband input port of the bridge unit is connected with a first port of the first U-Link, and a second port of the first U-Link is used as a new broadband input port; the output port of the bridge unit is connected with the first port of the second U-Link, and the second port of the second U-Link is used as a new output port; and the second port of the first U-Link is connected with the second port of the second U-Link to realize the switching of the synthesizer unit.
Furthermore, the synthesizer unit is a bridge unit, the switching unit is a 4-port anisotropic coaxial switch, the 4 ports of the anisotropic coaxial switch are all provided with a right-angled elbow, one group of ports capable of realizing connection of the anisotropic coaxial switch are respectively connected with the broadband input port and the broadband output port of the bridge unit, and the other group of ports capable of realizing connection of the anisotropic coaxial switch are used as a new broadband input port and a new broadband output port.
Has the beneficial effects that: the utility model discloses a multi-channel synthesizer has broadband mouth switching element, and when any one or more bridge type unit broke down in the multi-channel synthesizer, through the switching to switching element, can break off trouble bridge type unit from a whole set of multi-channel synthesizer, the remainder of multi-channel synthesizer can normally work, just so can not cause the long-time stop broadcasting of a plurality of frequencies, has promoted whole wireless transmitting system's stability and reliability.
Drawings
FIG. 1 is a schematic view of a bridge-type hexaplexer;
FIG. 2 is a schematic diagram of a multi-channel synthesizer;
FIG. 3 is a schematic diagram of a FM duplexer unit with a wide band port switching unit;
FIG. 4 is a schematic diagram of a FM duplexer unit with a wide band port switching unit;
FIG. 5 is a schematic diagram of a frequency modulated bridge hexaplexer with cell switching;
FIG. 6 is a schematic diagram of a frequency modulated bridge hexaplexer with cell switching;
fig. 7 is a schematic diagram of a frequency-modulated duplexer unit using U-links as switching devices.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.
As shown in fig. 2, the multi-channel synthesizer with unit switching function of the present invention generally has a wide band port reserved as a backup port, or is used when multiple units are cascaded, and a transmitter is connected to a narrow band port of the multi-channel synthesizer. On the basis of the traditional bridge multiplexer structure (see fig. 1), a broadband port switching unit of each unit is added, and the unit switching function is achieved; the wide band port switching unit is matched with the bridge units of the multi-channel synthesizer, and one bridge unit is provided with one wide band port switching unit. Because each input port of the multi-channel synthesizer in the bridge structure has broadband characteristics, the broadband port of the multi-channel synthesizer in the bridge structure is a natural backup port. When one bridge unit in the multiplexer has a fault, the fault unit is disconnected from the whole set of multi-channel synthesizer through the broadband port switching unit, after the fault unit is disconnected, the working frequency of the standby transmitter can be adjusted to the working frequency of the fault bridge unit, and then the standby transmitter is connected to the narrowband port of the multi-channel synthesizer. Therefore, all frequencies of the whole set of multi-channel synthesizer can work normally without stopping broadcasting, and the reliability of the whole system can be further improved.
The utility model discloses a figure 3 and figure 4 show a frequency modulation duplexer unit with broadband mouth switching unit, wherein, including two bridge type units (or call fixed impedance type duplex unit) 1, every bridge type unit has 4 ports and is the narrowband input port respectively, the broadband input port, load mouth and delivery outlet, a bridge type unit 1 is furnished with a broadband mouth switching unit 2, the core equipment of broadband mouth switching unit 2 is syntropy coaxial change over switch, concretely, syntropy coaxial change over switch is 4 port devices, the double-pole double-throw structure, every port can respectively with two adjacent ports conduction connection through syntropy coaxial change over switch's switching.
Fig. 5 and fig. 6 show a frequency modulation bridge type duplexer with unit switching function, one group of connectable ports of the same-direction coaxial switches are respectively connected with the broadband input port and the broadband output port of the bridge unit, the other group of connectable ports of the same-direction coaxial switches become the broadband input port and the broadband output port of a new bridge unit, and a plurality of bridge units with switching units are cascaded to form a multi-channel synthesizer with unit switching function.
The above-mentioned syntropy coaxial change over switch possesses manual, electronic, remote control 3 kinds of switching modes altogether, and every syntropy coaxial change over switch is furnished with independent controller. The coaxial switch is switched by manual, electric or remote control through the controller, and the specific operations are as follows:
when the gear position switch on the controller is rotated to a manual position, the switching of the switching unit can be completed by rotating a knob on the coaxial switch, namely, the matched bridge unit is disconnected or connected back from the whole set of multi-channel synthesizer.
When the gear position switch on the controller rotates to the 'electric' position, the switching of the switching unit can be completed by pressing the red and green buttons on the controller.
When the gear position switch on the controller is rotated to a remote position, the remote switching control of the switching unit can be realized through the RJ45 Ethernet interface or the RS-485 serial port on the controller.
The wide band port switching unit of the multi-channel synthesizer has a remote switching function, and the transmitter is provided with a power detection function of the transmitter and used for monitoring the power output by the transmitter in real time, so that a user can acquire the monitoring data to judge and control.
Based on the power detection function that the broadband mouth switching unit possesses long-range switching function and transmitter, the utility model discloses be equipped with corresponding automatic control system, can realize the automated inspection and the automatic switch-over of a whole set of system. The specific process is as follows:
judging whether a transmitter fails or a synthesizer unit fails according to the output power of the transmitter, if a certain transmitter fails or a certain synthesizer unit fails, sending instructions to all transmitters by an automatic control system, and shutting down all transmitters; then, the automatic control system sends an instruction to the coaxial switch of the switching unit corresponding to the transmitter with the fault, and the bridge unit is disconnected from the whole set of multiplexers; and then, sending instructions to other transmitters, restarting the transmitters and finishing the switching operation. If the system is provided with a spare transmitter, the frequency of the spare transmitter is adjusted to the frequency with fault, and the spare transmitter is properly connected with a narrow band port of the multi-channel synthesizer in advance; and finally, the automatic control system controls all the transmitters to start, the whole system recovers to work normally, and the failed transmitters or the bridge type units are disconnected from the whole system, so that the maintenance can be carried out and the failure can be eliminated. The whole process of controlling the switching by the automatic control system can be completed within 1 minute.
The broadband port switching unit of the present invention can also adopt U-Link to replace the same direction coaxial switch, fig. 7 shows the frequency modulation duplexer unit adopting U-Link 3 as the switching device, which includes the first U-Link and the second U-Link; the broadband input port of the bridge unit is connected with the 1 st port of the first U-Link at the rear side of the panel, and the 2 nd port of the first U-Link is used as a new broadband input port; the output port of the bridge unit is connected with the 1 st port of the second U-Link at the rear side of the panel, and the 2 nd port of the second U-Link is used as a new output port. The 2 nd port of the first U-Link and the 2 nd port of the second U-Link can be connected through the U-Link at the front side of the panel to realize unit switching. If a U-Link is used as the switching means, only manual switching can be performed. When the bridge unit of the multi-channel synthesizer fails, the switching function can be realized through manual switching of the U-Link.
The utility model discloses a broadband mouth switching unit also can adopt incorgruous coaxial switch as auto-change over device. The 4 ports of the different-direction coaxial change-over switch are provided with right-angle bends, then one group of ports capable of realizing connection are respectively connected with the broadband input port and the broadband output port of the bridge type unit, and the other group of ports capable of realizing connection of the same-direction coaxial change-over switch is used as a new broadband input port and a new broadband output port.
The utility model discloses a take multi-channel synthesizer of unit switching function can be the FM multi-channel synthesizer of work in 87 ~ 108MHz frequency channel, also can be the TV multi-channel synthesizer of work in 167 ~ 223MHz or 470 ~ 702MHz frequency channel, can also be the multi-channel synthesizer of work in other frequencies.
Claims (9)
1. A multi-channel synthesizer with unit switching function, comprising: the synthesizer comprises a plurality of synthesizer units and a plurality of switching units, wherein one synthesizer unit is provided with one switching unit; a plurality of synthesizer units provided with switching units are cascaded to form a multi-channel synthesizer with a unit switching function;
when a synthesizer unit fails or a transmitter connected to a synthesizer unit fails, the failed synthesizer unit or the synthesizer unit connected to the failed transmitter is disconnected from the multichannel synthesizer by the switching unit.
2. The multi-channel synthesizer with unit switching function of claim 1, wherein: the synthesizer unit is a bridge type unit, the switching unit is a homodromous coaxial selector switch with 4 ports, one group of ports capable of realizing connection of the homodromous coaxial selector switch is respectively connected with a broadband input port and an output port of the bridge type unit, and the other group of ports capable of realizing connection of the homodromous coaxial selector switch is used as a new broadband input port and a new broadband output port.
3. The multi-channel synthesizer with unit switching function of claim 1, wherein: the synthesizer unit is a bridge unit, the switching unit comprises a first U-Link and a second U-Link, a broadband input port of the bridge unit is connected with a first port of the first U-Link, and a second port of the first U-Link is used as a new broadband input port; the output port of the bridge unit is connected with a first port of a second U-Link, and a second port of the second U-Link is used as a new output port; and the second port of the first U-Link is connected with the second port of the second U-Link, so that the switching of the synthesizer unit is realized.
4. The multi-channel synthesizer with unit switching function of claim 1, wherein: the synthesizer unit is a bridge type unit, the switching unit is a 4-port anisotropic coaxial switch, right-angle bends are arranged on the 4 ports of the anisotropic coaxial switch, one group of ports which can be connected are respectively connected with the broadband input port and the broadband output port of the bridge type unit, and the other group of ports which can be connected are used as a new broadband input port and a new broadband output port.
5. A wireless transmission system, characterized by: the system comprises a multi-channel synthesizer with a unit switching function, a plurality of transmitters and a control unit; the output power of the transmitters is input into a multi-channel synthesizer with a unit switching function for power synthesis;
the multi-channel synthesizer with the unit switching function comprises a plurality of synthesizer units and a plurality of switching units, wherein one synthesizer unit is provided with one switching unit, and the synthesizer units provided with the switching units are cascaded to form the multi-channel synthesizer with the unit switching function; each switching unit is provided with an independent controller; the output power of each transmitter is input to the narrow-band input port of the corresponding switching unit;
each transmitter is internally provided with a transmitter power detection unit and a switch unit, wherein the transmitter power detection unit is used for acquiring output power data and reflected power data of the transmitter, and the switch unit is used for controlling the startup and shutdown of the transmitter;
the control unit is respectively connected with the transmitter power detection unit of each transmitter, the switch unit of each transmitter and the controller of each switching unit; the control unit is used for acquiring data of all transmitter power detection units, judging whether a transmitter with a fault or a synthesizer unit with a fault exists, if the transmitter with the fault or the synthesizer with the fault exists, controlling all the transmitters to be switched off, controlling a controller of a switching unit connected with the transmitter/synthesizer unit with the fault to be switched, disconnecting the transmitter with the fault and the synthesizer unit from a wireless transmission system, and controlling the rest transmitters to be switched on after the transmitter with the fault is disconnected; if no fault exists, no operation is performed.
6. A wireless transmission system according to claim 5, wherein: also includes a standby transmitter; when a certain transmitter or a certain synthesizer unit in the system has a fault, the frequency of the standby transmitter is adjusted to the fault frequency and is connected with a broadband port of the multi-channel synthesizer.
7. A wireless transmission system according to claim 5, wherein: the synthesizer unit is a bridge type unit, the switching unit is a homodromous coaxial selector switch with 4 ports, one group of ports capable of realizing connection of the homodromous coaxial selector switch are respectively connected with a broadband input port and an output port of the bridge type unit, and the other group of ports capable of realizing connection of the homodromous coaxial selector switch are used as a new broadband input port and an output port.
8. A wireless transmission system according to claim 5, wherein: the synthesizer unit is a bridge unit, the switching unit comprises a first U-Link and a second U-Link, a broadband input port of the bridge unit is connected with a first port of the first U-Link, and a second port of the first U-Link is used as a new broadband input port; the output port of the bridge unit is connected with the first port of the second U-Link, and the second port of the second U-Link is used as a new output port; and the second port of the first U-Link is connected with the second port of the second U-Link to realize the switching of the synthesizer unit.
9. A wireless transmission system according to claim 5, wherein: the synthesizer unit is a bridge type unit, the switching unit is a 4-port anisotropic coaxial switch, the 4 ports of the anisotropic coaxial switch are respectively provided with a right-angle elbow, one group of ports capable of realizing connection of the anisotropic coaxial switch are respectively connected with a broadband input port and a broadband output port of the bridge type unit, and the other group of ports capable of realizing connection of the anisotropic coaxial switch are used as a new broadband input port and a new broadband output port.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122312090.6U CN217590979U (en) | 2021-09-24 | 2021-09-24 | Multi-channel synthesizer with unit switching function and wireless transmitting system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122312090.6U CN217590979U (en) | 2021-09-24 | 2021-09-24 | Multi-channel synthesizer with unit switching function and wireless transmitting system |
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| CN217590979U true CN217590979U (en) | 2022-10-14 |
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