A DOCSIS 4.0 full-band radio frequency signal generator

Abstract

The utility model discloses a kind of DOCSIS4.0 full-band radio frequency signal generators, including VCO broadband frequency synthesis circuit, digital step radio frequency attenuation circuit, microprocessor circuit, lithium battery circuit, display circuit, micro-USB interface circuit, keying circuit;The output end of the VCO broadband frequency synthesis circuit is connected with the input end of digital step radio frequency attenuation circuit, the output end of digital step radio frequency attenuation circuit is connected with the output end of the full-band radio frequency signal generator of DOCSIS4.0 system, the input end of VCO broadband frequency synthesis circuit, the input end of digital step radio frequency attenuation circuit is also respectively connected with the output end of microprocessor circuit, microprocessor circuit is also respectively connected with lithium battery circuit, display circuit, micro-USB interface circuit, keying circuit.

Description

Technical Field

[0001] This utility model relates to the field of cable television technology, and in particular to a DOCSIS4.0 full-band radio frequency signal generator. Background Technology

[0002] CMTS technology is a mature two-way cable TV network transmission technology. Currently, DOCSIS 4.0 can achieve download speeds of up to 10Gbps and upload speeds of up to 6Gbps. In addition to the significant speed improvement, DOCSIS 4.0 also achieves major upgrades in latency reduction. To support the faster speeds, DOCSIS 4.0 includes spread spectrum technology, extending the uplink signal spectrum to 684MHz and the downlink signal spectrum to 1.8GHz. This extended spectrum creates a larger channel for data transmission, making it faster and more efficient. The DOCSIS 4.0 cable TV system operates in the uplink frequency range of 45MHz-684MHz and the downlink frequency range of 684MHz-1800MHz. Therefore, the construction and maintenance of DOCSIS 4.0 two-way cable TV networks require miniaturized, portable, full-band RF signal generators compatible with both uplink and downlink transmission frequency ranges.

[0003] To address the problems existing in the prior art, a DOCSIS4.0 full-band radio frequency signal generator is provided. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a DOCSIS4.0 full-band radio frequency signal generator.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A DOCSIS 4.0 full-band radio frequency signal generator includes a VCO broadband frequency synthesis circuit, a digital step radio frequency attenuation circuit, a microprocessor circuit, a lithium battery circuit, a display circuit, a micro USB interface circuit, and a button circuit. The output of the VCO broadband frequency synthesis circuit is connected to the input of the digital step RF attenuation circuit. The output of the digital step RF attenuation circuit is connected to the output of the full-band RF signal generator of the DOCSIS4.0 system. The inputs of the VCO broadband frequency synthesis circuit and the digital step RF attenuation circuit are also connected to the outputs of the microprocessor circuit. The microprocessor circuit is also connected to the lithium battery circuit, the display circuit, the micro USB interface circuit, and the button circuit.

[0006] Furthermore, the VCO broadband frequency synthesis circuit uses the ADF4351.

[0007] Furthermore, the digital step RF attenuation circuit uses the model DAT-3175A.

[0008] Furthermore, the microprocessor circuit used is model MS60F302X.

[0009] Furthermore, the lithium battery circuit uses the ME4075 model.

[0010] Furthermore, the display circuit uses model number TL028QVV49-P1804A.

[0011] Furthermore, the micro USB interface circuit uses the CH9101 model.

[0012] Furthermore, the button circuit uses the STS-A5 model.

[0013] Compared with existing technologies, the miniaturized, low-cost, and portable DOCSIS 4.0 full-band radio frequency signal generator of this invention serves as a testing instrument for DOCSIS 4.0 cable television networks. It facilitates the construction and maintenance of uplink and downlink radio frequency signal transmission channels for DOCSIS 4.0 cable television systems, and has significant economic and social benefits in ensuring the high-quality operation of cable television systems. Attached Figure Description

[0014] Figure 1 This is a structural diagram of a DOCSIS 4.0 full-band radio frequency signal generator provided in the embodiment. Detailed Implementation

[0015] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0016] The purpose of this invention is to address the shortcomings of existing technologies by providing a DOCSIS4.0 full-band radio frequency signal generator.

[0017] This embodiment provides a DOCSIS 4.0 full-band radio frequency signal generator, which is a testing instrument for cable television networks, such as... Figure 1As shown, it includes a VCO broadband frequency synthesis circuit 1, a digital step RF attenuation circuit 2, a microprocessor circuit 3, a lithium battery circuit 4, a display circuit 5, a micro USB interface circuit 6, and a button circuit 7.

[0018] The output of VCO broadband frequency synthesis circuit 1 is connected to the input of digital step RF attenuation circuit 2. The output of digital step RF attenuation circuit 2 is connected to the output of the full-band RF signal generator of DOCSIS 4.0 system. The inputs of VCO broadband frequency synthesis circuit 1 and digital step RF attenuation circuit 2 are also connected to the outputs of microprocessor circuit 3. The output of microprocessor circuit 3 is also connected to the inputs of lithium battery circuit 4 and display circuit 5. The input of microprocessor circuit 3 is connected to the output of button circuit 7. Microprocessor circuit 3 is connected to micro USB interface circuit 6.

[0019] The input signal of the cable TV network is processed by the VCO broadband frequency synthesis circuit 1, and the processed signal is input to the digital step RF attenuation circuit 2. The digital step RF attenuation circuit 2 adjusts the amplitude of the full-band signal as needed. The output of the digital step RF attenuation circuit 2 is the output port of the full-band RF signal generator of the DOCSIS4.0 system, which is used to output the full-band RF signal of the cable TV network.

[0020] The microprocessor circuit 3 is used to control the VCO broadband frequency synthesis circuit 1 and the digital step RF attenuation circuit 2. The microprocessor circuit 3 is also used to control the lithium battery circuit 4, the display circuit 5, the micro USB interface circuit 6, and the button circuit 7.

[0021] VCO wideband frequency synthesis circuit 1 uses ADI's integrated VCO wideband frequency synthesizer, model ADF4351. When used in conjunction with an external loop filter and an external reference frequency, this chip can realize a fractional-N or integer-N division phase-locked loop (PLL) frequency synthesizer. Using 1 / 2 / 4 / 8 / 16 / 32 / 64 division circuits, it can generate RF output frequencies from 45MHz to 1800MHz, with an output RF signal amplitude of 100dBμV.

[0022] The digital step RF attenuation circuit 2 uses a digital step attenuation chip from Mini-Circuits, model DAT-3175A. The minimum attenuation step size is 1dB, the maximum attenuation is 31dB, and the operating frequency range is 1 MHz–2500MHz. The amplitude of the full-band RF output signal can be adjusted as needed through the digital step RF attenuator.

[0023] The microprocessor circuit 3 uses the MS60F302X from SYM Microelectronics. It is a 32-bit microcontroller with a high-performance ARM Cortex-M0 core, a maximum clock frequency of 72MHz, built-in high-speed memory, and rich I / O ports and peripherals connected to the external bus.

[0024] The lithium battery circuit 4 uses the ME4075 from Micromob Electronics, a complete constant current / constant voltage linear charging chip for single-cell lithium-ion batteries. Its SOT23-5 package and fewer external components make the ME4075 ideal for portable applications. Furthermore, the ME4075 is designed to operate within the USB power specification and also features functions such as charging current monitoring, undervoltage lockout, and automatic recharging.

[0025] The display circuit 5 uses a high-brightness color display screen (50.00*69.20*2.36) from Shanghai Guanxian Optoelectronic Technology Co., Ltd., model TL028QVV49-P1804A.

[0026] The micro USB interface circuit 6 uses the low-cost, high-performance USB to serial bridge controller CH9101 from Nanjing Qinheng Microelectronics Co., Ltd. It supports full-speed USB device interfaces (compatible with USB 2.0) and has built-in firmware that can simulate a standard serial port, enabling USB to asynchronous serial port functionality without modifying existing serial port applications.

[0027] The button circuit 7 uses a tactile switch from Hongqi Co., Ltd., model STS-A5.

[0028] The miniaturized, low-cost, and portable full-band radio frequency signal generator for the DOCSIS 4.0 system provided in this embodiment serves as a testing instrument for DOCSIS 4.0 cable television networks. It facilitates the construction and maintenance of uplink and downlink radio frequency signal transmission channels for DOCSIS 4.0 cable television networks, and has significant economic and social benefits in ensuring the high-quality operation of cable television network systems.

[0029] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A DOCSIS 4.0 full-band radio frequency signal generator, characterized in that, Includes VCO broadband frequency synthesis circuit, digital step RF attenuation circuit, microprocessor circuit, lithium battery circuit, display circuit, micro USB interface circuit, and button circuit; The output of the VCO broadband frequency synthesis circuit is connected to the input of the digital step RF attenuation circuit. The output of the digital step RF attenuation circuit is connected to the output of the full-band RF signal generator of the DOCSIS4.0 system. The inputs of the VCO broadband frequency synthesis circuit and the digital step RF attenuation circuit are also connected to the output of the microprocessor circuit. The microprocessor circuit is also connected to the lithium battery circuit, the display circuit, the micro USB interface circuit, and the button circuit. The digital step RF attenuation circuit used is model DAT-3175A.

2. The DOCSIS 4.0 full-band radio frequency signal generator according to claim 1, characterized in that, The VCO broadband frequency synthesis circuit uses the ADF4351.

3. The DOCSIS 4.0 full-band radio frequency signal generator according to claim 1, characterized in that, The microprocessor circuit used is model MS60F302X.

4. A DOCSIS 4.0 full-band radio frequency signal generator according to claim 1, characterized in that, The lithium battery circuit uses the ME4075 model.

5. A DOCSIS 4.0 full-band radio frequency signal generator according to claim 1, characterized in that, The display circuit uses model number TL028QVV49-P1804A.

6. A DOCSIS 4.0 full-band radio frequency signal generator according to claim 1, characterized in that, The micro USB interface circuit uses the CH9101 model.

7. A DOCSIS 4.0 full-band radio frequency signal generator according to claim 1, characterized in that, The button circuit uses the STS-A5 model.

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