Radio frequency debugging tool applied to cable television transmission network
By designing metal probes of different lengths in RF debugging tools to simulate capacitance effects, the problems of low efficiency and high cost of RF debugging in the prior art are solved, and a more efficient debugging process and tool service life is achieved.
Patent Information
- Application Number
- CN202420776561.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-15
AI Technical Summary
The existing RF debugging methods have problems with high man-hours, high cost and ineffective adjustment of stray capacitors, resulting in low debugging efficiency and high cost.
A radio frequency debugging tool is designed, including the first test part and the second test part, equipped with metal probes of different lengths, connected through an insulated grip part, simulating capacitance effects of different sizes, and helping debuggers decide whether to weld or remove them. Capacitors improve commissioning efficiency and reduce costs.
By simulating capacitance effects of different sizes, the efficiency of RF debugging is improved, the manpower and cost are reduced, and the service life of the tool is extended.
Smart Images
Figure CN222192450U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of cable TV communication, and in particular relates to a radio frequency debugging tool applied to a cable TV transmission network. Background Art
[0002] The RF characteristics of transmission equipment determine the stability and clarity of signal transmission in cable TV transmission networks. For example, factors such as material tolerance and impedance matching of transmission equipment can lead to differences in RF characteristic indicators, which directly affect the transmission quality. In order to ensure the best transmission quality, manual debugging is required during the production of transmission equipment, such as adjusting and optimizing RF characteristics.
[0003] Existing RF debugging methods face challenges such as high man-hours, high costs, and ineffective adjustment of stray capacitance. Utility Model Content
[0004] The utility model provides a radio frequency debugging tool, which is helpful to solve the problems of the existing radio frequency debugging method.
[0005] The radio frequency debugging tool disclosed in the utility model comprises a first testing part, a second testing part and an insulating holding part. The first testing part comprises a first metal probe. The second testing part comprises a second metal probe. The insulating holding part is connected to the first testing part and the second testing part and is arranged between the first testing part and the second testing part.
[0006] According to the radio frequency debugging tool disclosed by the utility model, based on the metal probes of different lengths at both ends of the radio frequency debugging tool, it is possible to simulate the capacitance effects of different sizes when the radio frequency debugging tool contacts the radio frequency circuit to determine whether to solder or remove the capacitor, thereby improving the debugging efficiency, reducing the required working hours, and reducing the problem of excessively high costs caused by directly soldering real capacitors. Furthermore, the metal probe can be retractably arranged on the protective shell, thereby extending the service life of the radio frequency debugging tool. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 It is a schematic diagram of a radio frequency debugging tool according to an embodiment of the utility model when the metal probe is retracted into the protective shell.
[0008] Figure 2 It is a schematic diagram of a radio frequency debugging tool according to an embodiment of the utility model when the metal probe extends out of the protective shell.
[0009] Figure 3 Schematic diagram of the RF debugging system.
[0010] Figure 4 It is a schematic diagram of using the radio frequency debugging tool of the utility model.
[0011] Figure 5 This is a trend diagram showing that the return loss improves when the radio frequency debugging tool of the present invention is used.
[0012] Figure 6 It is a trend diagram of return loss degradation when using the radio frequency debugging tool of the utility model.
[0013] Figure 7 FIG. 4 is a schematic diagram of a radio frequency debugging tool according to another embodiment of the utility model.
[0014] [Description of Reference Numerals]
[0015] 100,100a: RF debugging tool
[0016] 110,110a: First Test Section
[0017] 111: The first metal detector
[0018] 112,112a: First protective shell
[0019] 113: First control switch
[0020] 120,120a: Second test section
[0021] 121: Second metal probe
[0022] 122,122a: Second protective shell
[0023] 123: Second control switch
[0024] 130: Insulation grip
[0025] 200: Test device
[0026] 210: Products to be tested
[0027] 220: Wire
[0028] TP: Test Point DETAILED DESCRIPTION
[0029] The detailed features and advantages of the present invention are described in detail in the following embodiments, and the contents are sufficient to enable ordinary technicians in the field to understand the technical content of the present invention and implement it accordingly. According to the contents disclosed in this specification, the claims and the drawings, ordinary technicians in the field can easily understand the relevant purposes and advantages of the present invention. The following examples are to further explain the viewpoints of the present invention in detail, but are not intended to limit the scope of the present invention in any way.
[0030] In cable TV transmission networks, the RF characteristic indicators of transmission equipment, such as return loss, flatness, and gain, directly affect the transmission quality of signals. At the same time, due to factors such as material tolerance and impedance matching of traditional transmission equipment, the RF characteristic indicators of transmission equipment cannot be completely consistent, so that the RF characteristic indicators need to be manually debugged during the production process of transmission equipment. One of the most critical debugging actions is to adjust the stray capacitance on the RF circuit. Stray capacitance generally refers to the capacitance characteristics of inductance, resistance, chip pins, wiring, etc. in the circuit under high frequency conditions. For example, the adjustment action includes directly soldering or removing the capacitor to increase or reduce the stray capacitance effect. Which specific debugging action to adopt traditionally requires the rich experience and high working hours of the debugger, resulting in the existing RF debugging methods having extremely low debugging efficiency and high costs.
[0031] According to one embodiment of the utility model, the radio frequency debugging tool includes a first test part, a second test part and an insulating gripping part. The first test part includes a first metal probe. The second test part includes a second metal probe. Wherein, the insulating gripping part is connected to the first test part and the second test part and is arranged between the first test part and the second test part. Wherein the first test part also includes a first protective shell, and the second test part also includes a second protective shell, wherein the first metal probe is fixed to the first protective shell and protrudes from the first protective shell, and the second metal probe is fixed to the second protective shell and protrudes from the second protective shell. Wherein the length of the first metal probe is different from the length of the second metal probe. Wherein one end of the first metal probe is a conical structure, and one end of the second metal probe is a conical structure. Wherein the length of the first metal probe is 4.5 mm, and the length of the second metal probe is 7.5 mm.
[0032] According to another embodiment of the utility model, the radio frequency debugging tool includes a first test section, a second test section and an insulating gripping section. The first test section includes a first metal probe. The second test section includes a second metal probe. Wherein, the insulating gripping section is connected to the first test section and the second test section and is arranged between the first test section and the second test section. Wherein the first test section also includes a first protective shell, and the second test section also includes a second protective shell, wherein the first metal probe is telescopically arranged in the first protective shell, and the second metal probe is telescopically arranged in the second protective shell. Wherein the first test section also includes a first control switch, and the second test section also includes a second control switch, wherein the first control switch is arranged in the first protective shell and connected to the first metal probe, and the second control switch is arranged in the second protective shell and connected to the second metal probe. Wherein the length of the first metal probe is different from the length of the second metal probe. Wherein one end of the first metal probe is a conical structure, and one end of the second metal probe is a conical structure. Wherein the length of the first metal probe is 4.5 mm, and the length of the second metal probe is 7.5 mm.
[0033] Part or all of the technical features disclosed in one or more embodiments of the present invention may be configured in combination to achieve corresponding effects.
[0034] Please refer to Figure 1 and Figure 2 . Figure 1 is a schematic diagram of a radio frequency debugging tool according to an embodiment of the utility model when the metal probe is retracted into the protective shell, and Figure 2 It is a schematic diagram of a radio frequency debugging tool according to an embodiment of the utility model when the metal probe extends out of the protective shell.
[0035] The radio frequency debugging tool 100 may include a first testing portion 110 , a second testing portion 120 and an insulating holding portion 130 .
[0036] The first testing part 110 may include a first metal probe 111, a first protective shell 112, and a first control switch 113. The first metal probe 111 may be retractably disposed in the first protective shell 112. The first control switch 113 may be disposed in the first protective shell 112 and connected to the first metal probe 111. Further, the first metal probe 111 may be retractably disposed in the first protective shell 112 based on the first control switch 113. In detail, when the first metal probe 111 needs to be used, the first metal probe 111 may extend out of the first protective shell 112 based on the first control switch 113, and when the first metal probe 111 is not needed, the first metal probe 111 may be retracted into the first protective shell 112 based on the first control switch 113, so that the first protective shell 112 can protect the first metal probe 111 from being broken or damaged when the RF debugging tool 100 accidentally falls, thereby extending the service life of the RF debugging tool 100.
[0037] The second testing part 120 may include a second metal probe 121, a second protective shell 122, and a second control switch 123. The second metal probe 121 may be retractably disposed in the second protective shell 122. The second control switch 123 may be disposed in the second protective shell 122 and connected to the second metal probe 121. Further, the second metal probe 121 may be retractably disposed in the second protective shell 122 based on the second control switch 123. In detail, when the second metal probe 121 needs to be used, the second metal probe 121 may extend out of the second protective shell 122 based on the second control switch 123, and when the second metal probe 121 is not needed, the second metal probe 121 may be retracted into the second protective shell 122 based on the second control switch 123, so that the second protective shell 122 can protect the second metal probe 121 from being broken or damaged when the RF debugging tool 100 accidentally falls, thereby extending the service life of the RF debugging tool 100.
[0038] The insulating gripping portion 130 may be connected to the first test portion 110 and the second test portion 120 and may be disposed between the first test portion 110 and the second test portion 120. When the RF debugging tool 100 performs RF testing, the insulating gripping portion 130 may not interfere with the product under test.
[0039] In this embodiment, the length of the first metal probe 111 may be different from the length of the second metal probe 121. Further, the length of the first metal probe 111 may be less than the length of the second metal probe 121. In detail, the length of the first metal probe 111 may be 4.5 mm, and the length of the second metal probe 121 may be 7.5 mm. Further, the first metal probe 111 may simulate a capacitance of 0.3 pF when in contact with the RF circuit, and the second metal probe 121 may simulate a capacitance of 0.5 pF when in contact with the RF circuit.
[0040] Furthermore, one end of the first metal probe 111 and one end of the second metal probe 121 may be a tapered structure.
[0041] Please refer to the schematic diagram of the RF debugging tool using this utility model Figure 3 and Figure 4 . Figure 3 A schematic diagram of the RF debugging setup, and Figure 4 It is a schematic diagram of using the radio frequency debugging tool of the utility model.
[0042] The product to be tested 210 can be electrically connected to the test device 200 via a wire 220 (for example, but not limited to a radio frequency cable). In this embodiment, when the metal probe of the radio frequency debugging tool 100 contacts the test point TP on the radio frequency circuit, the test device 200 can output feedback on the change of the radio frequency characteristic index of the product to be tested 210. The debugging personnel can directly adjust the stray capacitance of the radio frequency circuit of the product to be tested 210 through the change of the radio frequency characteristic index on the test device 200. The test point can be a place with or without capacitance in the circuit. In this embodiment, the radio frequency characteristic index takes return loss (ReturnLoss) as an example to illustrate the specific implementation method of the radio frequency debugging tool 100, but it is not limited to this.
[0043] For example, if Figure 4 As shown, when the second metal probe 121 of the RF debugging tool 100 contacts the test point on the RF circuit of the product to be tested 210 (the product to be tested 210 in this embodiment is a cable TV transmission network device as an example), it is equivalent to simulating the addition of a 0.5pF capacitor to the ground on the RF circuit. At this time, the return loss test result on the test device 200 may be better than the initial state waveform trend (such as Figure 5 as shown) or deterioration (as Figure 6For example, the first metal probe 111 of the RF debugging tool 100 can also contact the test point on the RF circuit of the product to be tested 210, which can be equivalent to simulating the addition of 0.3pF capacitance to the ground on the RF circuit.
[0044] Please refer to Figure 5 , Figure 5 The return loss trend diagram is shown in Figure 2. The return loss waveform on the test device 200 is better than the initial state waveform trend (i.e., the waveform is farther from the specification line), indicating that adding a 0.5pF ground capacitor to this test point of the RF circuit will improve the return loss, thus clearly indicating that the operator needs to solder a 0.5pF ground capacitor to this test point.
[0045] On the other hand, please refer to Figure 6 , Figure 6 The figure is a trend diagram of return loss degradation when using the RF debugging tool of the present invention. The return loss waveform on the test device 200 is worse than the initial state waveform (i.e., part of the waveform is above the specification line), indicating that adding a 0.5pF ground capacitor at this test point of the RF circuit will make the return loss worse, thereby clearly indicating that the operator does not need to solder a 0.5pF ground capacitor here or needs to remove the existing 0.5pF ground capacitor at this test point.
[0046] According to the above-mentioned metal probes with different lengths at both ends of the RF debugging tool 100, it is possible to simulate capacitance effects of different sizes when the RF debugging tool 100 contacts the RF circuit to decide whether to solder or remove the capacitor, thereby improving debugging efficiency, reducing the required working hours, and reducing the problem of excessively high costs caused by directly soldering real capacitors.
[0047] In addition, Figure 1 and Figure 2 In the embodiment, the first metal probe 111 is retractably disposed in the first protective shell 112, and the second metal probe 121 is retractably disposed in the second protective shell 122, but the first metal probe 111 and the first protective shell 112 are not limited to the retractable state. Figure 7 As shown, Figure 7 FIG. 1 is a schematic diagram of a radio frequency debugging tool according to another embodiment of the present invention. In this embodiment, the radio frequency debugging tool 100 a may include a first testing portion 110 a , a second testing portion 120 a , and an insulating gripping portion 130 .
[0048] The first testing portion 110a may include a first metal probe 111 and a first protective shell 112a. The first metal probe 111 may be fixed to the first protective shell 112a and protrude from the first protective shell 112a, but cannot be retracted into the first protective shell 112a.
[0049] The second testing portion 120a may include a second metal probe 121 and a second protective shell 122a. The second metal probe 121 may be fixed to the second protective shell 122a and protrude from the second protective shell 122a, but cannot be retracted into the second protective shell 122a.
[0050] The insulating gripping portion 130 may be connected to the first testing portion 110 a and the second testing portion 120 a and disposed between the first testing portion 110 a and the second testing portion 120 a .
[0051] The first metal probe 111 and the second metal probe 121 in this embodiment are similar to Figure 1 and Figure 2 The first metal probe 111 and the second metal probe 121 in the embodiment are not described in detail.
Claims
1. A radio frequency debugging tool, characterized in that: Include: A first testing part, comprising a first metal probe; a second testing section, comprising a second metal probe; and an insulating grip; The insulating gripping portion is connected to the first testing portion and the second testing portion and is disposed between the first testing portion and the second testing portion.
2. The radio frequency debugging tool according to claim 1, characterized in that: The first testing part further includes a first protective shell, and the second testing part further includes a second protective shell, wherein the first metal probe is fixed to the first protective shell and protrudes from the first protective shell, and the second metal probe is fixed to the second protective shell and protrudes from the second protective shell.
3. The radio frequency debugging tool according to claim 2, characterized in that: The length of the first metal probe is different from the length of the second metal probe.
4. The radio frequency debugging tool according to claim 3, characterized in that: One end of the first metal probe is a cone-shaped structure, and one end of the second metal probe is a cone-shaped structure.
5. The radio frequency debugging tool according to claim 3, characterized in that: The length of the first metal probe is 4.5 mm, and the length of the second metal probe is 7.5 mm.
6. The radio frequency debugging tool according to claim 1, characterized in that: The first testing part further includes a first protective shell, and the second testing part further includes a second protective shell, wherein the first metal probe is telescopically disposed in the first protective shell, and the second metal probe is telescopically disposed in the second protective shell.
7. The radio frequency debugging tool according to claim 6, characterized in that: The first testing part further includes a first control switch, and the second testing part further includes a second control switch, wherein the first control switch is disposed in the first protective shell and connected to the first metal probe, and the second control switch is disposed in the second protective shell and connected to the second metal probe.
8. The radio frequency debugging tool according to claim 6, characterized in that: The length of the first metal probe is different from the length of the second metal probe.
9. The radio frequency debugging tool according to claim 8, characterized in that: One end of the first metal probe is a cone-shaped structure, and one end of the second metal probe is a cone-shaped structure.
10. The radio frequency debugging tool according to claim 8, characterized in that: The length of the first metal probe is 4.5 mm, and the length of the second metal probe is 7.5 mm.