Device for detecting tuner and satellite receiver

Abstract

The invention provides a device for detecting a tuner and a satellite receiver, which is mainly used for detecting the working states of the tuner and the satellite receiver, and integrates a tuner detection circuit and a satellite receiver detection circuit on a printed circuit board (PCB) together. The tuner detection circuit comprises a crystal triode, a light emitting diode LEDA, a resistor I, a switch I, a tuner F head interface PA and a direct current power supply provided by a 9V carbon battery, and the satellite receiver detection circuit comprises a light emitting diode LEDB, a resistor II, a switch II and a satellite receiver F head interface PB. By using the device, the tuner and the satellite receiver can be respectively and independently detected, so that the time for troubleshooting is saved, the time for stopping broadcasting of radio and television programs is reduced, and the loss caused by long-time stopping broadcasting is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of radio and television, and particularly to a device for detecting a tuner and a satellite receiver. Background Art

[0002] In the fields of radio and television and satellite communication, as key devices for signal reception and processing, the stability and reliability of the performance of a tuner and a satellite receiver are crucial for ensuring high-quality signal transmission. With the continuous development of technology, the demand for detecting tuners and satellite receivers is also increasing day by day to ensure their stable and accurate operation in practical applications.

[0003] At present, many small and medium-sized medium-wave transmitting stations and rural household users adopt satellite receiving antennas to receive the required high-frequency radio and television signals. The high-frequency signal frequency range is 11.7 - 12.75 GHz. Then, the tuner converts the high-frequency radio and television signals into intermediate-frequency signals. The intermediate-frequency signal frequency range is 950 - 2150 MHz. Then, the intermediate-frequency signals are transmitted to the satellite receiver through coaxial cables. Finally, the satellite receiver decodes the intermediate-frequency signals into radio and television signals that can be used for broadcasting and viewing. However, satellite receiving antennas and tuners are all outdoor radio and television broadcasting equipment. If extreme weather occurs outdoors, such as heavy rainfall or thunderstorm weather, it is very easy for the tuner to get waterlogged or be damaged by lightning strikes. If the thunderstorm weather lasts for a long time, lightning may also be inverted from the coaxial cable to the satellite receiver, causing damage to the satellite receiver. Once there is a situation of interruption of radio and television signals, no sound or picture on the radio or television, generally, the method of replacing radio and television broadcasting equipment is adopted to find the faulty broadcasting equipment, such as replacing the tuner, receiver or coaxial cable. If spare parts and special detection tools are lacking, the time for troubleshooting will increase, resulting in the situation of not being able to listen to or watch radio and television programs for a long time. The detection circuits for tuners and receivers can quickly and accurately independently detect the tuner and the satellite receiver respectively when faults occur in broadcasting equipment such as tuners and satellite receivers, thus saving the time for troubleshooting and reducing the time of suspension of radio and television programs.

[0004] Therefore, it is necessary to provide a new device for detecting a tuner and a satellite receiver to solve the above technical problems. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a device for detecting a tuner and a satellite receiver.

[0006] The device provided by the present invention for detecting a tuner and a satellite receiver includes: a tuner detection circuit and a satellite receiver detection circuit that are integrally integrated on a PCB circuit board. The tuner detection circuit includes a crystal triode and a light-emitting diode LED A , a first resistor, a first switch, and a tuner F-connector interface P A , and a DC power supply provided by a 9V carbon battery. The positive pole of the DC power supply is electrically connected to one end of the first switch, the other end of the first switch is electrically connected to one end of the first resistor, the other end of the first resistor is electrically connected to the anode of the light-emitting diode LED A , the cathode of the light-emitting diode LED A is electrically connected to the collector of the crystal triode, the collector of the crystal triode is electrically connected to the base, the emitter of the crystal triode is electrically connected to one end of the tuner F-connector interface P A , and an electrical connection is formed between the other end of the tuner F-connector interface P A and the negative pole of the DC power supply to form a signal path.

[0007] Preferably, the satellite receiver detection circuit includes a light-emitting diode LED B , a second resistor, a second switch, and a satellite receiver F-connector interface P B . One end of the satellite receiver F-connector interface P B is electrically connected to one end of the second switch, the other end of the second switch is electrically connected to one end of the second resistor, the other end of the second resistor is electrically connected to the anode of the light-emitting diode LED B , and the cathode of the light-emitting diode LED B is electrically connected through the other end of the satellite receiver F-connector interface P B to form a signal path.

[0008] Preferably, the first resistor is a metal carbon film resistor with a resistance of 455Ω - 475Ω.

[0009] Preferably, the crystal triode is a through-hole NPN type triode.

[0010] Preferably, the power supply is a DC power supply.

[0011] Preferably, the second resistor is a carbon film resistor with a resistance of 9KΩ - 12KΩ.

[0012] Preferably, the signal ports of the tuner F-connector interface P A and the signal ports of the satellite receiver F-connector interface P B are respectively electrically connected to the ports of the tuner and the satellite receiver through coaxial cables.

[0013] Compared with the related technologies, the device provided by the present invention for detecting a tuner and a satellite receiver has the following beneficial effects:

[0014] 1. The present invention integrates the tuner detection circuit and the satellite receiver detection circuit on a single PCB circuit board, which not only realizes the integrated design of the circuit, but also reduces the volume of the entire detection circuit and lowers the cost. For many small and medium-sized medium-wave transmitting stations and rural household users, when there are shortages of spare parts and special detection tools, if the tuner or satellite receiver fails to work properly or malfunctions, it will cause long-term interruptions in radio and television programs. Using a low-cost and easily detectable tuner and satellite receiver detection circuit can quickly and accurately independently detect the tuner and the satellite receiver, saving the time for troubleshooting and reducing the downtime of radio and television programs, thus avoiding losses caused by long-term downtime. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the schematic diagram of the tuner detection circuit;

[0016] Figure 2 is the schematic diagram of the satellite receiver detection circuit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present invention will be further described below in conjunction with the drawings and embodiments.

[0018] Please refer to Figures 1 to 2 , wherein, Figure 1 is the schematic diagram of the tuner detection circuit; Figure 2 is the schematic diagram of the satellite receiver detection circuit.

[0019] The functions of the tuner and satellite receiver detection circuits are mainly divided into two parts. One part is mainly used to detect whether the tuner fails; the other part is mainly used to detect whether the satellite receiver fails.

[0020] As Figure 1 shown, the tuner detection circuit includes: a crystal triode, a light-emitting diode LED A , a first resistor, a first switch, a tuner F-connector P A and a DC power supply provided by a 9V carbon battery, which is denoted as DC power supply one. The positive pole of the DC power supply is electrically connected to one end of the first switch, the other end of the first switch is electrically connected to one end of the first resistor, the other end of the first resistor is electrically connected to the anode of the light-emitting diode LED A , the cathode of the light-emitting diode LED A is electrically connected to the collector of the crystal triode, the collector of the crystal triode is electrically connected to the base, and the emitter of the crystal triode is electrically connected to the tuner F-connector P Ais electrically connected to one end of the F-type connector P of the RF tuner A and an electrical connection is formed between the other end and the negative pole of the DC power supply to form a signal path.

[0021] Among them, resistor one is denoted as R A and switch one is denoted as S A The RF tuner detection circuit and the satellite receiver detection circuit are integrated on a single PCB circuit board, which helps to reduce the use of components, shrink the volume of the entire detection circuit, and thus reduce the production cost of the detection circuit. The DC power supply of the RF tuner detection circuit is provided by a 9V square carbon battery for the entire circuit. Resistor one uses a 470Ω metal film resistor. The detection circuit uses a red light-emitting diode LED A as the indicator light of the circuit. The crystal triode uses a through-hole NPN type triode, model: BC547. If there is no crystal triode of the same model, a crystal triode with model: S8050 or S9013 can also be used instead.

[0022] The entire RF tuner detection circuit is connected to a coaxial cable through the F-type connector P of the RF tuner A and then connected to the RF tuner port through the coaxial cable. After the device connection is completed, the 9V square carbon battery supplies power to the detection circuit. DC power one is output from terminal 1 of the main power output interface to terminal 1 of the switch. At this time, when the boat-type switch with model KCD1-101 is closed, the DC power one is output from the switch to the resistor end. The resistance value of the resistor is 470Ω, which can provide a suitable voltage drop protection for the light-emitting diode LED A to ensure its normal operation.

[0023] Subsequently, the DC power one reaches the collector and base of the crystal triode, providing conduction voltages for the collector and base of the crystal triode respectively. If the detection circuit is conducting, the current at the collector terminal will reach the maximum value and remain basically stable. At this time, the collector current is no longer controlled by the base, and the crystal triode is in the saturation state. The crystal triode acts as a switch and plays the role of a switch.

[0024] By the working state of the RF tuner detection circuit, it can be judged whether the RF tuner is normal. If the RF tuner is normal, the indicator light, that is, the light-emitting diode LED A will light up; if the indicator light does not light up, it means that the RF tuner has a fault and needs to be replaced or repaired.

[0025] As Figure 2 shown, the satellite receiver detection circuit includes: a light-emitting diode LED B , resistor two, switch two, and the F-type connector P of the satellite receiver B , the F-type connector P of the satellite receiver BOne end is electrically connected to one end of Switch 2, the other end of Switch 2 is electrically connected to one end of Resistor 2, and the other end of Resistor 2 is electrically connected to the anode of Light Emitting Diode LED B The cathode of Light Emitting Diode LED B is electrically connected to the other end of the F connector P of the satellite receiver to form a signal path B between them

[0026] Resistor 2 is a 9KΩ - 12KΩ carbon film resistor;

[0027] The signal port of the F connector P of the LNB A and the signal port of the F connector P of the satellite receiver B are respectively electrically connected to the ports of the LNB and the satellite receiver through coaxial cables;

[0028] Among them, the satellite receiver is a PBI satellite digital TV receiver, its model is: DCH - 3100P, the input frequency range of the satellite receiver: 950 - 2150MHz, the output voltage of the satellite receiver signal port: 13V, the rated operating voltage of the satellite receiver is: 90V - 250V AC, and the rated operating voltage frequency of the satellite receiver is: 50 - 60Hz.

[0029] Among them, Resistor 2 is denoted as R B Switch 1 is denoted as S B The signal port of the satellite receiver is denoted as DC Power Supply 2, which provides the 13V DC power supply required for the satellite receiver detection circuit.

[0030] When the satellite receiver detection circuit is connected to the coaxial cable through the F connector P of the satellite receiver B and then connected to the satellite receiver port through the coaxial cable, after the device connection is completed, the satellite receiver starts to provide a 13V DC power supply for the entire detection circuit. The specific working process is as follows:

[0031] 1. DC Power Supply 2 outputs from the 1 - end of the F connector P of the satellite receiver B to the 1 - port of S B

[0032] 2. Close Switch 2, and the DC power supply outputs to one end of R B R B has a resistance value of 10KΩ, which can provide appropriate voltage drop protection for Light Emitting Diode LED B to ensure its normal operation.

[0033] 3. After the DC power supply passes through Light Emitting Diode LED B it then returns to the 2 - end of the F connector P of the satellite receiver through a wire to form a complete loop. B ​​

[0034] By detecting the working state of the satellite receiver circuit, it is possible to determine whether the satellite receiver is normal. If the satellite receiver is working properly, a 13V DC power supply will be output. At this time, the indicator light, namely the light-emitting diode LED B , will light up; if the indicator light does not light up, it means that there is a fault with the satellite receiver and it needs to be replaced or repaired.

[0035] Furthermore, the LNB detection circuit mainly uses components such as a bipolar junction transistor and a light-emitting diode LED A , a resistor, etc. to form a circuit to test the working state of the LNB. If the LNB is working properly, the light-emitting diode LED A will light up, indicating that the entire detection circuit is in a conducting state. If there is a fault with the LNB, the light-emitting diode LED A will not light up, indicating that the LNB is in a damaged state.

[0036] In this regard, when troubleshooting the LNB and the satellite receiver, we also conducted experiments. We used the continuity function of a multimeter to detect the LNB for faults. The model of the multimeter is SATA 03015, a digital multimeter. As a result, we were unable to detect whether the LNB was in a normal working state, that is, we could not detect whether the LNB was in a damaged state. Similarly, we used the resistance measurement function of the multimeter to detect the LNB for faults, that is, by measuring the resistance value of the LNB with the multimeter. As a result, we were also unable to accurately reflect the operating state of the LNB during actual operation. Because the LNB mainly converts high-frequency signals (the frequency range of high-frequency signals: 11.7 - 12.75 GHz) into intermediate-frequency signals suitable for the satellite receiver to decode (the frequency range of intermediate-frequency signals: 950 - 2150 MHz). During actual operation, the operation of the LNB involves the reception and conversion of high-frequency signals. The characteristics of its internal circuit are different when the high-frequency signal is in the working state and when the intermediate-frequency signal is in the working state. Using a multimeter can usually only detect some basic parameter changes of circuit components. If there are abnormal conditions in circuit components when the high-frequency signal is in the working state, simply using a multimeter cannot accurately reflect whether it is damaged or in a fault state.

[0037] In addition, integrating the RF head detection circuit and the satellite receiver detection circuit together on a single PCB circuit board not only realizes the integrated design of the circuit, but also reduces the volume of the entire detection circuit and lowers the cost. For many small and medium AM radio stations and rural household users, especially rural household users who rarely have spare parts and dedicated detection tools, if the RF head or satellite receiver fails to work properly or malfunctions, it will cause long interruptions in radio and TV programs. Using a low-cost and easily detectable RF head and satellite receiver detection circuit can quickly and accurately independently detect the RF head and satellite receiver, saving the time for troubleshooting and reducing the downtime of radio and TV programs, thus avoiding losses caused by long-term downtime.

[0038] Furthermore, when using the RF head detection circuit and the satellite receiver detection circuit to detect the RF head and satellite receiver, through the RF head F-connector P A and the satellite receiver F-connector P B are respectively connected to coaxial cables, and then the coaxial cables are respectively connected to the RF head and the satellite receiver for detection.

[0039] Even further, in the actual use process, for the RF head detection circuit and the satellite receiver detection circuit, if the RF head and the satellite receiver are not connected to the corresponding detection circuits through the RF head F-connector P A and the satellite receiver F-connector P B , when the switch one or switch two is turned on at this time, the red light-emitting diodes LED A and LED B in the RF head detection circuit and the satellite receiver detection circuit will not light up. Only when the RF head and the satellite receiver are connected to the interfaces of the detection circuit through coaxial cables, and then the switch one or switch two is turned on, if the RF head and the satellite receiver are working properly, the red light-emitting diodes LED A and LED B will light up respectively, that is, both the entire RF head detection circuit and the satellite receiver detection circuit are in a conductive state. If the RF head and the satellite receiver malfunction, the red light-emitting diodes LED A and LED B will not light up, indicating that the RF head and the satellite receiver are in a damaged state.

[0040] As Figure 1 , Figure 2 shown, Figure 1 the DC power supply one in Figure 2 is denoted as power supply A,

[0041] The circuits and controls involved in the present invention are all prior arts and will not be elaborated herein.

[0042] The above are only embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A device for detecting a tuner and a satellite receiver, characterized in that, It includes a tuner detection circuit and a satellite receiver detection circuit that are jointly arranged on a PCB circuit board. The tuner detection circuit includes: a crystal triode, a light-emitting diode LED A , a first resistor, a first switch, a tuner F-connector interface P A and a power supply. The positive pole of the power supply is electrically connected to one end of the first switch, the other end of the first switch is electrically connected to one end of the first resistor, and the other end of the first resistor is connected to the light-emitting diode LED A anode is electrically connected. The cathode of the light-emitting diode LED A is electrically connected to the collector of the crystal triode. The collector of the crystal triode is electrically connected to the base. The emitter of the crystal triode is electrically connected to one end of the tuner F-connector interface P A . A signal path is electrically connected between the other end of the tuner F-connector interface P A and the negative pole of the DC power supply.

2. The device for detecting a tuner and a satellite receiver according to claim 1, wherein The satellite receiver detection circuit includes: a light-emitting diode LED B , a second resistor, a second switch, and the F-type connector P of the satellite receiver B . One end of the F-type connector P of the satellite receiver B is electrically connected to one end of the second switch, the other end of the second switch is electrically connected to one end of the second resistor, and the other end of the second resistor is electrically connected to the anode of the light-emitting diode LED B . A signal path is formed by electrically connecting the cathode of the light-emitting diode LED B to the other end of the F-type connector P of the satellite receiver B .

3. The device for detecting a tuner and a satellite receiver according to claim 2, wherein, The first resistor is a metal carbon film resistor with a resistance value ranging from 455Ω to 475Ω.

4. The device for detecting a tuner and a satellite receiver according to claim 3, characterized in that, The crystal triode is a through-hole NPN type triode.

5. The device for detecting a tuner and a satellite receiver according to claim 4, characterized in that, The power supply is a DC power supply provided by a 9V carbon battery.

6. The device for detecting a tuner and a satellite receiver according to claim 5, wherein, The second resistor is a carbon film resistor with a resistance value ranging from 9KΩ to 12KΩ.

7. The device for detecting a tuner and a satellite receiver according to claim 6, characterized in that, The signal port of the F connector P of the tuner A and the signal port of the F connector P of the satellite receiver B are electrically connected to the ports of the tuner and the satellite receiver respectively through coaxial cables.

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