16 results about "Broadcast transmitter" patented technology

The utility model relates to the technical field of lightning protection, in particular to a lightning protection structure of a medium-wave broadcast transmitter, which comprises a protection cabinet, the protection cabinet comprises a fixed cabinet, the bottom of the fixed cabinet is provided with a wire I, the bottom end of the wire I is fixedly connected with a grounding grid, and an L-shaped bracket is fixedly arranged on a base of an external antenna. A lightning rod is fixed to the top of the L-shaped support, a second wire fixed to the grounding grid is fixed to the bottom of the L-shaped support, the top end of the second wire is fixedly connected with the lightning rod, and the outer side of an external cable is sleeved with a conducting ring. According to the utility model, the conducting ring is sleeved on the cable of the antenna and the transmitter cabinet, so that the lightning stroke current on the cable can be grounded through the lead 3 when the current of lightning counterattack, lightning shielding failure or induction lightning stroke is transmitted to the transmitter cabinet through the cable along the antenna; the cable is effectively prevented from directly transmitting strong lightning stroke current to the transmitter cabinet, and electrical elements in the transmitter cabinet can be protected.

The present application provides a method, device and equipment for determining the health degree and task reachability of a radio transmitter, and relates to the technical field of radio transmission.The present application can first mine data with higher occurrence frequency in historical monitoring data of a target transmitter, and then mine main data dimensions with higher correlation degree.Determine evaluation indexes in the mined main data dimensions, and determine the performance score of the target transmitter.Using historical data to drive index generation, quantifying correlation probability through frequent item set, and avoiding subjective differences in personnel experience.Using the correlation degree between data dimensions, mining potential impact indexes, and improving the comprehensive coverage of evaluation.The present application combines historical data mining and analytic hierarchy process to dynamically generate evaluation indexes and weights, and improves the accuracy of determining the health degree and task reachability of a radio transmitter.

The utility model relates to the field of broadcast transmitters, and discloses an all-solid-state short-wave AM20kW broadcast transmitter, which comprises a signal source, an exciter, a pre-stage amplifier, a power divider, a plurality of power amplification systems, a synthesizer, a filter and a directional coupler, the output end of the power divider is respectively connected with the input ends of the plurality of power amplification systems, the output ends of the plurality of power amplification systems are connected to the synthesizer, the output end of the synthesizer is sequentially connected with the filter and the directional coupler, and the output end of the directional coupler is connected to a load. Excitation signals are divided into a plurality of power amplification systems in proportion through a power divider, and uniform distribution of the signals in a wide frequency range is achieved. High-power output is guaranteed, good frequency band consistency is maintained, stable transmission of broadband signals is achieved, and the application requirement of a complex short-wave communication environment is met.

A method of controlling operation of an end device using a one-way radio broadcast includes sending an encrypted message from a client application of a computing device to a first network server, sending the encrypted message from the first network server to a second server included with radio broadcast automation equipment, transmitting the encrypted message in a radio broadcast signal using one or more radio broadcast transmitters, receiving the radio broadcast signal at an end device, and decrypting the encrypted message using the end device. The encrypted message includes control information to control operation of the end device.

The application discloses a broadcast transmitter switching device and a switching method thereof, and the switching device comprises a mechanical carrier and a control unit; the mechanical carrier comprises a cabinet body, a resistor body framework and a fan support are arranged in the lower part of the cabinet body, a first resistor body and a second resistor body are arranged on the resistor body framework, a first fan and a second fan are arranged on the fan support, a first partition plate is arranged on the upper part of the resistor body framework, an external interface plate is arranged on the first partition plate, a second partition plate is arranged in the upper part of the cabinet body, a coaxial converter is arranged on the upper part of the second partition plate, an emergency support is arranged on the lower part of the second partition plate, a front door and a back door are arranged on the cabinet body, a switch, an indicator lamp and a high-frequency power meter are arranged on the front door panel, and the external interface plate and the emergency support are arranged on the inner side of the back door. The application can be effectively applied to the switching of the broadcast transmitter, stable and efficient switching between the main machine, the standby machine, the transmitting antenna and the dummy load can be realized, the performance is stable and reliable, the market prospect is wide, and the application is convenient to popularize and use.

The utility model discloses a maintenance tool for a broadcast transmitter, and relates to the technical field of broadcast transmitter maintenance. The guide groove is formed in the grab handle, two ports of the guide groove are located at one end of the grab handle, and the guide groove is distributed in the length direction of the grab handle; the two limiting plates are arranged in the guide groove in a parallel sliding mode, and one limiting plate extends out of one end opening of the guide groove; according to the scheme, the two limiting plates alternately extend out of the two end openings of the guide groove by shifting the limiting plates, through limiting cooperation of the two limiting plates and the right-angle rod and elastic driving of the elastic telescopic rod, the right-angle rod is made to rotate by 90 degrees, and therefore the rotating blocks at the two ends of the right-angle rod can be flexibly switched to meet the disassembly and assembly requirements of connecting pieces of different specifications; and quick switching and positioning are facilitated, so that actual operation is relatively convenient, and disassembly and assembly are quick.

1. The name of the design product: FM radio transmitter all-in-one (FM 3kW). 2. The use of the design product: for the generation and amplification of audio radio frequency signals, and for the transmission of the generated and amplified audio radio frequency signals over a large area with high quality. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The utility model discloses a testing device for a power module of a PSM short-wave broadcast transmitter. The testing device comprises a power supply unit, a voltage regulator, an on-off device, an AC contactor, a first measuring device, a second measuring device, a third measuring device and a dummy load. Corresponding interfaces of the power supply unit are respectively connected with the voltage regulator and the alternating current contactor; the voltage regulator is respectively connected with the first measuring device and a three-phase rectifier bridge in the power module to be tested through an alternating current contactor; the three-phase rectifier bridge is respectively connected with the second measuring device and the IGBT module in the power module; the IGBT module is connected with the dummy load through a third measuring device; the alternating current contactor is connected with a corresponding interface of the power supply unit through the on-off device. The working environment of the single-stage power module of the PSM short-wave broadcast transmitter can be simulated, so that off-line detection of the power module is realized, and a fault part in the power module can be quickly positioned.

For example, an apparatus may include logic and circuitry configured to cause a Bluetooth (BT) broadcast transmitter to transmit one or more broadcast data Protocol Data Units (PDUs) including broadcast data. For example, the BT broadcast transmitter may be configured to transmit a broadcast control PDU after the one or more broadcast data PDUs. For example, the broadcast control PDU may include an opcode field and a control data field. For example, the opcode field may include a predefined opcode value configured to indicate a recipient-targeted data PDU type. For example, the control data field may include targeted data for one or more targeted recipients.

The utility model discloses a broadcast transmitter accessory machining positioning clamp, and relates to the technical field of positioning clamps. Comprising a base, a fixed seat, a movable seat and a handle, the fixed seat, the movable seat and the handle are mounted on the base, the fixed seat is accurately mounted on the base through a positioning pin and an inner hexagon screw, the fixed seat and the inner side of the movable seat are provided with corresponding concave semi-cylindrical structures, and a cylindrical structure is formed when the fixed seat and the movable seat are tightly attached to clamp a cylindrical device; the fixed seat and the movable seat are provided with through channels, and standard parts and springs which play a role in connection and guiding are arranged in the through channels, so that stable movement of the movable seat can be guaranteed, buffering reset is provided, and the stability and reliability of the clamp are improved.

The utility model relates to the technical field of exhaust device, concretely just is a kind of broadcast television broadcast transmitter machine room exhaust device, including exhaust pipe and fixed base, the inside of fixed base is equipped with drying cavity, the inside sliding connection of drying cavity has drying plate, the outside of exhaust pipe is detachably connected with fixed plate, the other side of fixed base is connected with air outlet pipe, the inside of fixed base is equipped with driving assembly, driving assembly is used to drive drying plate to move, device and transmitter machine room detachably connect, it is convenient to carry out efficient heat dissipation to transmitter machine room, the inside of fixed base is provided with drying plate, air is efficiently dried and filtered by drying plate, prevent external humid air from entering to machine room inside, guarantee the efficient operation of transmitter.

1. Name of the product in this design: Broadcast Transmitter and Receiver Equipment. 2. Purpose of this design: For receiving wireless broadcast signals. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The broadcast transmitter digital power meter comprises a signal filtering and amplifying circuit, a signal processing module electrically connected with the signal filtering and amplifying circuit, and a signal output module electrically connected with the signal processing module, the signal filtering and amplifying circuit comprises an LM324N operational amplifier and filtering capacitors C1-C8; the signal processing module comprises a single-chip microcomputer which comprises an AD conversion circuit, a digital filtering module, a power calibration module and a DA conversion circuit. The signal output module comprises a display screen and an analog output interface. High-frequency harmonic suppression is realized through multi-stage capacitor filtering, high-precision amplification is realized, high-quality digitalization of a transmitter power meter is realized, and the problems of low precision and poor interference resistance of a traditional analog meter head are solved.

The utility model provides a broadcast transmitter antenna switch modularization automatic control system. The system comprises a switch matrix composed of a plurality of switches; the switch matrix is connected with a plurality of transmitters and a plurality of antennas; each switch is correspondingly connected with a switch control module to form a control module matrix corresponding to the position of the switch matrix; the switch control module is connected with a PLC. And the PLC is connected with a client module. According to the application, the automatic control of the transmitter antenna switch is realized, the state of the switch resource shared by multiple transmitters is monitored in real time, the signal interference and equipment conflict are avoided, the accurate execution of the switch action is ensured through the PLC feedback, and the system reliability is improved; the module matrix corresponds to an actual antenna switch matrix, so that the position of a fault module can be quickly found through matrix comparison when a fault occurs; when maintenance is carried out, the module corresponds to the antenna switch, so that debugging at two ends and maintenance of workers are facilitated.