CN212381326U - Satellite digital television signal testing device and system - Google Patents
Satellite digital television signal testing device and system Download PDFInfo
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- CN212381326U CN212381326U CN202021542379.6U CN202021542379U CN212381326U CN 212381326 U CN212381326 U CN 212381326U CN 202021542379 U CN202021542379 U CN 202021542379U CN 212381326 U CN212381326 U CN 212381326U
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Abstract
The utility model discloses a satellite digital television signal testing device and a system, wherein the testing device comprises a satellite change-over switch and a testing circuit; the satellite change-over switch is in a DiSEqC1.1 model and is provided with a plurality of tuners which respectively correspond to the multi-channel radio frequency signals of the satellite digital television, wherein the input end of the satellite change-over switch is electrically connected with the output end of the satellite digital television and is used for receiving the radio frequency signals sent by the satellite digital television, switching the switch to the tuner corresponding to the radio frequency signals according to the radio frequency signals and taking the output end of the tuner as the output end of the satellite change-over switch; the input end of the test circuit is electrically connected with the output end of the satellite change-over switch, and the output end of the test circuit is grounded and used for obtaining a satellite digital television signal test result according to the circuit conduction condition of the test circuit. The utility model discloses can promote satellite digital television signal's efficiency of software testing.
Description
Technical Field
The utility model relates to a satellite television field especially relates to a satellite digital television signal testing arrangement and system.
Background
In recent years, digital televisions represented by digital compression and digital communication have been rapidly developed, and mainly include satellite digital televisions, cable digital televisions, and terrestrial digital televisions. Among them, the satellite digital tv is deeply favored by consumers due to its wide coverage and low cost, so that manufacturers for producing satellite digital tv are increasing at present.
However, with the increasing number of manufacturers for producing satellite digital televisions, how to ensure the quality of satellite digital television products becomes a new problem faced by all manufacturers, so in order to improve the quality of satellite digital television products, the satellite digital television needs to be tested in the production process of the satellite digital television, and in numerous tests, the test of satellite digital television signals is one of the most important tests, while the existing test method of satellite digital television signals needs to test the satellite digital television by means of tools such as a multimeter, an oscilloscope and the like, the test process is tedious, certain requirements are also required on hardware knowledge of testers, and the method is not suitable for production line operation.
SUMMERY OF THE UTILITY MODEL
The utility model provides a satellite digital television signal testing arrangement, equipment and system can convert the signal test of satellite digital television to the circuit test, its simple structure, and the simple operation has improved the efficiency of satellite digital television signal test.
In a first aspect, the present invention provides a satellite digital television signal testing apparatus for performing signal testing on a satellite digital television, wherein the testing apparatus includes a satellite selector switch and a testing circuit; the satellite change-over switch is in a DiSEqC1.1 model and is provided with a plurality of tuners which respectively correspond to the multi-channel radio frequency signals of the satellite digital television, wherein the input end of the satellite change-over switch is electrically connected with the output end of the satellite digital television and is used for receiving the radio frequency signals sent by the satellite digital television, switching the switch to the tuner corresponding to the radio frequency signals according to the radio frequency signals and taking the output end of the tuner as the output end of the satellite change-over switch; the input end of the test circuit is electrically connected with the output end of the satellite change-over switch, and the output end of the test circuit is grounded and used for obtaining a satellite digital television signal test result according to the circuit conduction condition of the test circuit.
Furthermore, the test circuit comprises a voltage division unit and a result reminding unit connected with the voltage division unit; the input end of the voltage division unit is used as the input end of the test circuit and is electrically connected with the output end of the satellite selector switch, and the output end of the voltage division unit is used as the output end of the test circuit and is grounded; and the result reminding unit is used for sending out a reminder when the test circuit is switched on.
Further, the voltage division unit comprises a first resistor and a second resistor; the first resistor is connected with the result reminding unit in parallel, one end of the first resistor is electrically connected with the output end of the satellite change-over switch, the other end of the first resistor is connected with one end of the second resistor, and the other end of the second resistor is grounded.
Furthermore, the result reminding unit is a light emitting diode; the anode of the light emitting diode is electrically connected with the output end of the satellite change-over switch, and the cathode of the light emitting diode is electrically connected between the first resistor and the second resistor.
Furthermore, the voltage division unit further comprises a third resistor, and the anode of the light emitting diode is electrically connected with the output end of the satellite change-over switch through the third resistor.
Further, the resistance value of the first resistor is 4.7K, and the resistance value of the second resistor is 20K.
Further, the voltage division unit comprises a fourth resistor and a fifth resistor; one end of the fourth resistor is electrically connected with the output end of the satellite change-over switch, the other end of the fourth resistor is electrically connected with one end of the result reminding unit, the other end of the result reminding unit is electrically connected with one end of the fifth resistor, and the other end of the fifth resistor is grounded.
Further, the result reminding unit is a buzzer.
Further, the fourth resistor and the fifth resistor are both adjustable resistors.
In a second aspect, the present invention further provides a testing system, the testing system includes an external power source, a satellite digital tv and any one of the above mentioned, the satellite digital tv signal testing apparatus, the external power source is the satellite digital tv supplies power, the output of the satellite digital tv is connected to the input electrical property of the satellite digital tv signal testing apparatus, and the output of the satellite digital tv signal testing apparatus is grounded.
The utility model has the advantages of simple structure, through connect a test circuit behind satellite change over switch, will change the circuit test to test circuit to the signal test of satellite digital television to the efficiency to satellite digital television signal test has been improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a block diagram of a satellite digital television signal testing device provided by the present invention;
fig. 2 is a circuit diagram of an embodiment of a satellite digital television signal testing apparatus provided by the present invention;
fig. 3 is a circuit diagram of another embodiment of the satellite digital television signal testing apparatus provided by the present invention;
fig. 4 is a circuit diagram of a satellite digital television signal testing apparatus according to another embodiment of the present invention;
fig. 5 is a block diagram of a test system provided by the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Referring to fig. 1 to 3, the present invention provides a satellite digital television signal testing apparatus for testing signals of a satellite digital television 10. The utility model provides a satellite digital television signal testing arrangement 20 includes satellite change over switch 201 and test circuit 202; the satellite change-over switch 201 is of a type diseqc1.1 and is provided with a plurality of tuners which respectively correspond to the plurality of radio frequency signals of the satellite digital television 10, wherein an input end of the satellite change-over switch 201 is electrically connected with an output end of the satellite digital television, and is used for receiving the radio frequency signals sent by the satellite digital television 10, switching the switch to the tuner corresponding to the radio frequency signals according to the radio frequency signals, and using an output end of the tuner as an output end of the satellite change-over switch 201; the input end of the test circuit 202 is electrically connected with the output end of the satellite change-over switch 201, and the output end of the test circuit 202 is grounded and used for obtaining a satellite digital television signal test result according to the circuit conduction condition of the test circuit.
In particular, diseqc (digital Satellite Equipment control) is a digital Satellite Equipment control device, which is in fact a control protocol, often referred to as Satellite switch 201 for short, to switch between signals of multiple Satellite televisions, and the existing versions are diseqc1.0, diseqc1.1, diseqc1.2, and so on. The diseqc1.1 is mainly used to control the if switches that are switched in and out more than once, that is, the corresponding if switches are selected according to the rf signals of the satellite digital tv 10 to receive the corresponding satellite digital tv 10 signals. For example, the satellite digital tv 10 transmits a radio frequency signal, which includes a plurality of TPs (transponders) corresponding to voltages of "V (vertical polarization 13V) and H (horizontal polarization 18V)" and a digital pulse signal for controlling the diseqc1.1 to switch a switch to a corresponding LNB so as to receive a corresponding satellite digital tv 10 signal, to the diseqc1.1 connected to the tuner through its own tuner.
In the test apparatus, a test is performed based on diseqc1.1, diseqc1.1 can generally receive signals of 16 satellite digital televisions 10, each of the signals of the satellite digital televisions 10 corresponds to a tuner, which is generally abbreviated as LNB, for convenience of description, the following description of the second tuner is described by using LNB, and the signals of the 16 satellite digital televisions correspond to LNB1 to LNB16, respectively. When the satellite switch 201 receives a digital pulse signal carried by a radio frequency signal transmitted from the satellite digital television 10, the radio frequency signal is transmitted by a tester after the satellite digital television 10 performs corresponding selection, for example, the tester wants to test and receive a signal of LNB8, selects LNB8 on the satellite digital television 10, and then the satellite digital television transmits the radio frequency signal from an output end of the satellite digital television, and when the satellite switch 201 receives the radio frequency signal, switches the switch to LNB8, at this time, the satellite switch 201 can receive a signal of the satellite digital television related to LNB8, and at the same time, LNB8 turns on due to a vertical polarization voltage and a horizontal polarization voltage carried by a repeater in the radio frequency signal, and therefore, LNB8 is turned on. At this time, the test circuit 202 is connected to the LNB8, if the test circuit 202 is normally turned on, it indicates that the satellite digital television 10 can normally receive the satellite digital signal from the LNB8, and if the test circuit 202 is not turned on, it indicates that the satellite digital television 10 cannot receive the satellite digital signal from the LNB8, and the satellite digital television 10 has a problem. If the rf signal is used to control the satellite switch 201 to switch the switch to the LNB9, the test circuit 202 is connected to the LNB9, so as to test the receiving condition of the satellite digital signal of the LNB9, and thus the satellite digital television 10 controls to receive the corresponding satellite digital signal, and then the test circuit 202 is electrically connected to the LNB corresponding to the satellite digital signal, so as to convert the test of the satellite digital signal into a conduction test of the test circuit 202.
As a further embodiment, the test circuit includes a voltage dividing unit 203 and a result reminding unit connected to the voltage dividing unit 203; the input end of the voltage dividing unit 203 serves as the input end of the test circuit 202 and is electrically connected with the output end of the satellite switch 201, the output end of the voltage dividing unit 203 serves as the output end of the test circuit 202 and is grounded, and the result reminding unit is used for giving a reminder when the test circuit 202 is turned on.
The voltage dividing unit 203 is configured to divide the voltage of the LNB turned on in the satellite switch 201, so that the voltage entering the test circuit 202 meets a condition that a result reminding unit (not shown in the figure) sends a reminder. For example, in this embodiment, if the satellite switch 201 switches the switch to the LNB8, the input end of the test circuit 202 is connected to the LNB8, the voltage in the LNB8 enters the test circuit 202, and then is divided by the voltage dividing unit 203, so that the condition that the result reminding unit sends a reminder is met, if the result reminding unit sends a reminder, the whole test circuit 202 is turned on, which indicates that the satellite digital television 10 can normally receive the satellite digital signal of the LNB8, the test is successful, and if the result reminding unit does not send an early warning, which indicates that the satellite digital television 10 cannot receive the satellite digital signal of the LNB8, the test is failed.
As a further embodiment, the voltage dividing unit 203 includes a first resistor R1 and a second resistor R2; the first resistor R1 is connected in parallel with the result reminding unit, one end of the first resistor R1 is electrically connected with the output end of the satellite switch 201, the other end of the first resistor R1 is connected with one end of the second resistor R2, and the other end of the second resistor R2 is grounded.
The first resistor R1 is connected in parallel with the result reminding unit, and the second resistor R2 is connected in series with a parallel circuit formed by the first resistor R1 and the result reminding unit, so that the voltage division effect on the voltage from the satellite switch 201 is realized, and the test circuit 202 can be switched on when the satellite digital television 10 normally receives the signal of the satellite digital television.
As a further embodiment, the result reminding unit is a light emitting diode D; the anode of the light emitting diode D is electrically connected to the output end of the satellite switch 201, and the cathode of the light emitting diode D is electrically connected between the first resistor R1 and the second resistor R2.
The led D is used as a result reminding unit, and when the test circuit 202 is turned on, the led D will emit light with the turn-on of the test circuit 20, so that the result of the satellite signal test can be directly known.
As a further embodiment, the voltage dividing unit 203 further includes a third resistor R3, and the anode of the light emitting diode D is electrically connected to the output terminal of the satellite switch 201 through the third resistor R3.
The third resistor R3 is connected in series with the led D for protecting the led D and preventing the led D from being damaged by voltage breakdown.
As a further example, the first resistor R1 has a resistance of 4.7K, and the second resistor R2 has a resistance of 20K.
The first resistor R1 is 4.7K, and the second resistor R2 is 20K, which can satisfy the voltage dividing requirement of the voltage from the satellite switch 201, so that the light emitting diode D is turned on.
Referring to fig. 4, as a further embodiment, the voltage dividing unit 203 includes a fourth resistor R4 and a fifth resistor R5; one end of the fourth resistor R4 is electrically connected to the output end of the satellite switch 201, the other end of the fourth resistor R4 is electrically connected to one end of the result reminding unit, the other end of the result reminding unit is electrically connected to one end of the fifth resistor R5, and the other end of the fifth resistor R5 is grounded.
The fourth resistor R4, the result reminding unit and the fifth resistor R5 are sequentially connected in series, so that the voltage division effect on the voltage from the satellite switch 201 can be realized, and the test is facilitated.
In a further embodiment, the fourth resistor R4 and the fifth resistor R5 are both adjustable resistors.
The adjustable resistor is convenient for adjusting the resistance value according to actual conditions, the resistor with a specific resistance value does not need to be found, and the test circuit 202 is simplified.
In a further embodiment, the result reminding unit is a buzzer a.
The buzzer A is used as a result reminding unit, when the test circuit 202 is conducted, the buzzer sounds to remind that the test circuit 202 is conducted, the test is successful, and if the buzzer does not make a sound, the test circuit 202 is not conducted, and the test is not passed.
Referring to fig. 5, it is that the utility model also discloses a test system 1, test system includes external power supply, satellite digital television and any one of the above-mentioned satellite digital television signal testing arrangement, external power supply does the satellite digital television power supply, satellite digital television's output with satellite digital television signal testing arrangement's input electrical property links to each other, satellite digital television signal testing arrangement's output ground connection.
Meanwhile, the satellite digital television signal testing apparatus 20 may also be the satellite digital television signal testing apparatus 20 described in any embodiment of the foregoing embodiments, and specific electrical elements, connection modes of the apparatuses, and specific working principles of the satellite digital television signal testing apparatus 20 have been described in detail in the foregoing embodiments, and are not described herein again.
In a word, the utility model discloses an increase a test circuit 202 to can be according to the test demand, be connected test circuit 202 and the LNB that corresponds, thereby will convert the signal test to satellite digital television 10 to test circuit 202's conduction test, not only improved efficiency of software testing, simple structure has promoted the convenience moreover.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A satellite digital television signal testing device is used for testing signals of a satellite digital television and is characterized by comprising a satellite selector switch and a testing circuit;
the satellite change-over switch is in a DiSEqC1.1 model and is provided with a plurality of tuners which respectively correspond to the multi-channel radio frequency signals of the satellite digital television, wherein the input end of the satellite change-over switch is electrically connected with the output end of the satellite digital television and is used for receiving the radio frequency signals sent by the satellite digital television, switching the switch to the tuner corresponding to the radio frequency signals according to the radio frequency signals and taking the output end of the tuner as the output end of the satellite change-over switch;
the input end of the test circuit is electrically connected with the output end of the satellite change-over switch, and the output end of the test circuit is grounded and used for obtaining a satellite digital television signal test result according to the circuit conduction condition of the test circuit.
2. The satellite digital television signal testing device according to claim 1, wherein the testing circuit comprises a voltage dividing unit and a result reminding unit connected with the voltage dividing unit;
the input end of the voltage division unit is used as the input end of the test circuit and is electrically connected with the output end of the satellite selector switch, and the output end of the voltage division unit is used as the output end of the test circuit and is grounded;
and the result reminding unit is used for sending out a reminder when the test circuit is switched on.
3. The satellite digital television signal testing device according to claim 2, wherein the voltage dividing unit includes a first resistor and a second resistor;
the first resistor is connected with the result reminding unit in parallel, one end of the first resistor is electrically connected with the output end of the satellite change-over switch, the other end of the first resistor is connected with one end of the second resistor, and the other end of the second resistor is grounded.
4. The satellite digital television signal testing device of claim 3, wherein the result alert unit is a light emitting diode;
the anode of the light emitting diode is electrically connected with the output end of the satellite change-over switch, and the cathode of the light emitting diode is electrically connected between the first resistor and the second resistor.
5. The satellite digital television signal testing device according to claim 4, wherein the voltage dividing unit further comprises a third resistor, and the anode of the light emitting diode is electrically connected to the output terminal of the satellite switch through the third resistor.
6. The apparatus according to claim 5, wherein the first resistor has a resistance of 4.7K, and the second resistor has a resistance of 20K.
7. The satellite digital television signal testing device according to claim 2, wherein the voltage dividing unit includes a fourth resistor and a fifth resistor;
one end of the fourth resistor is electrically connected with the output end of the satellite change-over switch, the other end of the fourth resistor is electrically connected with one end of the result reminding unit, the other end of the result reminding unit is electrically connected with one end of the fifth resistor, and the other end of the fifth resistor is grounded.
8. The satellite digital television signal testing device of claim 7, wherein the result alert unit is a buzzer.
9. The satellite digital television signal testing device according to claim 8, wherein the fourth resistor and the fifth resistor are both adjustable resistors.
10. A test system, comprising an external power supply, a satellite digital television and the satellite digital television signal test device according to any one of claims 1 to 9, wherein the external power supply supplies power to the satellite digital television, the output terminal of the satellite digital television is electrically connected to the input terminal of the satellite digital television signal test device, and the output terminal of the satellite digital television signal test device is grounded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021542379.6U CN212381326U (en) | 2020-07-29 | 2020-07-29 | Satellite digital television signal testing device and system |
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| CN202021542379.6U CN212381326U (en) | 2020-07-29 | 2020-07-29 | Satellite digital television signal testing device and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113645461A (en) * | 2021-07-08 | 2021-11-12 | 浙江盛洋科技股份有限公司 | Novel tuner test circuit and test fixture |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113645461A (en) * | 2021-07-08 | 2021-11-12 | 浙江盛洋科技股份有限公司 | Novel tuner test circuit and test fixture |
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