CN110691237B - Debugging method of cable television system - Google Patents
Debugging method of cable television system Download PDFInfo
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- CN110691237B CN110691237B CN201911023946.9A CN201911023946A CN110691237B CN 110691237 B CN110691237 B CN 110691237B CN 201911023946 A CN201911023946 A CN 201911023946A CN 110691237 B CN110691237 B CN 110691237B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
Abstract
The embodiment of the invention relates to a debugging method of a cable television system, which is applied to level debugging equipment and comprises the following steps: acquiring a first input end signal parameter and a second input end signal parameter of each channel; comparing each first input end signal parameter with a corresponding first target parameter range, and controlling the sliding of the variable resistance head of the potentiometer according to a comparison result; comparing the signal parameter of the second input end with the corresponding range of the second target parameter, and controlling the output end of the passive mixer according to the comparison result; outputting the television signal to an output terminal of the amplifier; determining whether the level parameter of the output end of the amplifier is larger than a third target parameter; if the level parameter of the output end of the amplifier is not larger than the third target parameter, generating and outputting prompt information for replacing the amplifier; and if the level parameter of the output end of the amplifier is larger than the third target parameter, outputting the television signal to the trunk transmission system.
Description
Technical Field
The invention relates to the field of data processing, in particular to a debugging method of a cable television system.
Background
Cable tv attracts many users due to its advantages, cable stations are established in various places, and some old cable tv networks are gradually upgraded to adapt to the development of cable tv. In the building and daily maintenance of a cable television system, debugging is a very important work, is a main means for ensuring and implementing the technical performance of the system, is an indispensable working step for completing system engineering, and is a skill which is required by a cable television engineering technician to deeply understand and master the debugging of the system.
However, the current commissioning process relies heavily on manual adjustment by a technician, which fills the tuning process with uncontrollable properties.
Disclosure of Invention
The invention aims to provide a debugging method of a cable television system aiming at the defects of the prior art, so that the debugging process is automatic, and the uncontrollable property of equipment debugging is reduced.
In order to achieve the above object, an embodiment of the present invention provides a method for debugging a cable television system, where the method is applied to a level debugging device, and the method includes:
acquiring a first input end signal parameter and a second input end signal parameter of each channel;
comparing each first input end signal parameter with a corresponding first target parameter range, and controlling the sliding of a variable resistance head of a potentiometer according to a comparison result so that the first input end signal parameter corresponds to the first target parameter range;
comparing the second input end signal parameter with a corresponding second target parameter range, and controlling the output end of the passive mixer according to the comparison result so that the second input end signal parameter corresponds to the second target parameter range;
when the first input end signal parameter corresponds to the first target parameter range and the second input end signal parameter corresponds to the second target parameter range, outputting a television signal to an output end of an amplifier;
determining whether a level parameter at an output of the amplifier is greater than a third target parameter;
if the level parameter of the output end of the amplifier is not greater than the third target parameter, generating and outputting prompt information for replacing the amplifier;
and if the level parameter of the output end of the amplifier is larger than the third target parameter, outputting the television signal to a trunk transmission system.
Preferably, the acquiring of the first input end signal parameter and the second input end signal parameter of each channel signal specifically includes:
and acquiring a first input end signal parameter of each channel signal through the active mixer, and acquiring a second input end signal parameter of each channel signal through the passive mixer.
Further preferably, before the obtaining the first input end signal parameter and the second input end signal parameter of each channel signal, the method further includes:
determining whether each branch line is short-circuited;
and if the branch lines are not short-circuited, acquiring a first input end signal parameter and a second input end signal parameter of each channel antenna signal.
Preferably, if any of the branch lines is short-circuited, a message indicating that the circuit is short-circuited is generated and output.
Preferably, the mixer output is connected to the amplifier input.
Preferably, after said outputting said television signal to a mains system, said method further comprises:
adjusting a level difference parameter of each of the channel signals.
Further preferably, the adjusting the level difference parameter of each channel signal specifically includes:
and inputting a plurality of signals with preset decibels at the input end of the trunk amplifier, and adjusting the level difference parameter of each channel signal.
Preferably, after said outputting said television signal to a mains system, said method further comprises:
and adjusting the level parameter of the input end of the trunk amplifier.
Preferably, the adjusting the level of the input end of the trunk amplifier specifically includes:
when the AC and the intermodulation interference are generated, the electronic quantity at the input end of the trunk amplifier is reduced through the control of an attenuator.
The debugging method of the cable television system provided by the embodiment of the invention can realize automation of the debugging process, and can obtain parameter debugging equipment such as level and the like automatically, so that the debugging result is more accurate. And. The debugging method of the cable television system provided by the embodiment of the invention can effectively reduce the uncontrollable property of the equipment debugging process.
Drawings
Fig. 1 is a flowchart of a debugging method of a cable television system according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
The embodiment of the invention provides a debugging method of a cable television system, which is applied to level debugging equipment. A level debugging device may be understood as a debugging device having a computation processing function. A cable television system is understood to include a cable television system comprising a head-end system of passive mixers, potentiometers, mixers, amplifiers, etc., and a trunk transmission system of devices such as trunk amplifiers. It should be noted that the level adjustment device is disposed at one end of the cable television distribution system. The present embodiment takes a level debugging device as a main body, and describes a debugging method of the cable television system, and a flow chart of the method is shown in fig. 1, and includes the following steps:
specifically, the level adjustment device obtains a first input end signal parameter and a second input end signal parameter of a channel in the cable television system. The level debugging equipment acquires the first input end signal parameters of each channel by accessing the active amplification type mixer, and acquires the second input end signal parameters of each channel by accessing the passive amplification type mixer. The first input terminal signal parameter represents a level difference parameter outputted by accessing the active amplification type mixer, and the second input terminal signal parameter represents a level difference parameter outputted by accessing the passive amplification type mixer.
In some preferred embodiments, before the level adjustment device obtains the first input signal parameter and the second input signal parameter of each channel signal, it is required to determine whether each branch line in the cable television system is short-circuited. And if the branch lines are not short-circuited, acquiring a first input end signal parameter and a second input end signal parameter of each channel antenna signal. And if any branch line is short-circuited, generating and outputting prompt information of the short circuit to prompt a user that the short circuit condition exists, and carrying out power-on debugging after ensuring that no short circuit exists.
specifically, in one aspect, the level adjustment device compares each first input end signal parameter with a corresponding first target parameter range, and controls the sliding of the potentiometer variable resistance head according to the comparison result, so that the first input end signal parameter corresponds to the first target parameter range; in another aspect, the level tuning device further needs to compare the second input signal parameter with a corresponding second target parameter range, and control the output end of the mixer according to the comparison result, so that the second input signal parameter corresponds to the second target parameter range.
In one specific example, the first target parameter range and the second target parameter range are both set to ± 2 decibels. That is, when the active amplification type mixer is connected, the level adjustment device needs to control the level difference of each channel within ± 2 db by adjusting the sliding position of the varistor head in the potentiometer; when a passive amplification type mixer is connected, the level debugging equipment needs to control the level difference of each channel within +/-2 decibels by adjusting the output end of the five-yard amplification type mixer.
specifically, when the first input end signal parameter corresponds to the first target parameter range and the second input end signal parameter corresponds to the second target parameter range, the level debugging device outputs the television signal to the output end of the amplifier in the cable television system, so that the output end of the amplifier is connected with the television signal. The television signal may be a television signal of a home-made program or a satellite television broadcast television signal in the ordinary sense.
In some preferred examples, the amplifier input is connected to the output of the active amplification type mixer (or the output of the passive amplification type mixer) to increase the output level of the television signal.
specifically, after the level adjustment device outputs the television signal to the amplifier output terminal in the cable television system, the amplifier output terminal outputs a corresponding level parameter, and the level adjustment device needs to determine whether the level parameter of each channel is greater than a third target parameter. If the level parameter is not greater than the third target parameter, the following step 150 is performed. If the level parameter is greater than the third target parameter, the following step 160 is performed.
In a specific example, the third target parameter is set to 105 decibels. That is, the level-tuning device needs to determine whether the level of each channel is greater than 105 db.
specifically, if the level parameter of the output end of the amplifier is not greater than the third target parameter, it indicates that the amplifier has poor ac and intermodulation interference resistance, and the maximum output level does not meet the requirement of line level, and the amplifier should be replaced. The level debugging equipment generates and outputs prompt information for replacing the amplifier so as to prompt a user to replace the amplifier with better performance of resisting the crosstalk and the intermodulation interference.
It will be appreciated that after the level adjustment device generates and outputs the prompt message for replacing the amplifier, the level adjustment device continues to monitor and determine whether the level parameter at the output of the amplifier is greater than the third target parameter, i.e., returns to step 140. If the user replaces the appropriate amplifier, when it is determined that the level parameter is greater than the third target parameter while step 140 is performed again, step 160 described below is performed.
specifically, if the level parameter of the output end of the amplifier is not greater than the third target parameter, it indicates that the anti-ac and inter-modulation interference performance of the amplifier is qualified, and the output maximum level can also meet the requirement of line level, so that the television signal can be output to the trunk transmission system.
It is understood that after the above steps 110 and 160 are performed, the following steps 170 and 180 may be performed for further system debugging. In this embodiment, the debugging method in the two steps is described by taking the step 170 and the step 180 as examples, but the implementation order of the two steps is not limited, and those skilled in the art can adjust the implementation order of the two steps as needed.
specifically, the level adjustment device inputs a plurality of preset decibel signals at the input end of the trunk amplifier by a frequency equalization method, and adjusts the level difference parameter of each channel signal.
In a specific example, the predetermined decibel signals include 6 decibels, 10 decibels, and 12 decibels. The level difference parameter of the output signal of the amplifier is obtained by serially connecting a frequency audio processor at the input end of the trunk amplifier, and then the frequency audio processors with unequal balance of 6 dB, 10 dB and 12 dB are respectively serially connected according to the level difference parameter of the output signal of the amplifier, so that each channel signal is adjusted to be in a normal working state.
specifically, the level debugging equipment adjusts the level of the input end of the trunk amplifier, and when the alternating and intermodulation interference is generated, the electronic quantity of the input end of the trunk amplifier is reduced through the control of the attenuator, so that the output level is adjusted to be in a preset required state.
The debugging method of the cable television system provided by the embodiment of the invention can realize automation of the debugging process, and can obtain parameter debugging equipment such as level and the like automatically, so that the debugging result is more accurate. And. The debugging method of the cable television system provided by the embodiment of the invention can effectively reduce the uncontrollable property of the equipment debugging process.
Those of skill would further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied in hardware, a software module executed by a processor, or a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM powertrain control method, or any other form of storage medium known in the art.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A debugging method of a cable television system is characterized in that the method is applied to a level debugging device, and the method comprises the following steps:
acquiring a first input end signal parameter and a second input end signal parameter of each channel;
comparing each first input end signal parameter with a corresponding first target parameter range, and controlling the sliding of a variable resistance head of a potentiometer according to a comparison result so that the first input end signal parameter corresponds to the first target parameter range;
comparing the second input end signal parameter with a corresponding second target parameter range, and controlling the output end of the passive mixer according to the comparison result so that the second input end signal parameter corresponds to the second target parameter range;
when the first input end signal parameter corresponds to the first target parameter range and the second input end signal parameter corresponds to the second target parameter range, outputting a television signal to an output end of an amplifier;
determining whether a level parameter at an output of the amplifier is greater than a third target parameter;
if the level parameter of the output end of the amplifier is not greater than the third target parameter, generating and outputting prompt information for replacing the amplifier;
and if the level parameter of the output end of the amplifier is larger than the third target parameter, outputting the television signal to a trunk transmission system.
2. The cable television system debugging method of claim 1, wherein said obtaining the first input signal parameter and the second input signal parameter of each channel specifically comprises:
and acquiring the first input end signal parameters of each channel through the active mixer, and acquiring the second input end signal parameters of each channel through the passive mixer.
3. The method of claim 2, wherein prior to said obtaining the first input signal parameters and the second input signal parameters for each channel, the method further comprises:
determining whether each branch line is short-circuited;
and if the branch lines are not short-circuited, acquiring a first input end signal parameter and a second input end signal parameter of each channel antenna signal.
4. The debugging method of a cable television system according to claim 3, wherein if any of said branch lines is short-circuited, a prompt message of the short-circuit is generated and outputted.
5. A method for debugging a cable television system according to claim 1, wherein said mixer output is connected to an amplifier input.
6. The cable television system debugging method of claim 1, wherein after said outputting said television signal to a mains transmission system, said method further comprises:
adjusting a level difference parameter for each of the channels.
7. The method of claim 6, wherein the adjusting the level difference parameter of each channel comprises:
and inputting a plurality of signals with preset decibels at the input end of the trunk amplifier, and adjusting the level difference parameter of each channel.
8. The cable television system debugging method of claim 1, wherein after said outputting said television signal to a mains transmission system, said method further comprises:
the level parameter of the input terminal of the trunk amplifier is adjusted.
9. The method of claim 8, wherein the adjusting the level of the input of the main amplifier is specifically:
when the AC and the intermodulation interference are generated, the electronic quantity at the input end of the trunk amplifier is reduced through the control of an attenuator.
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| CN1288333A (en) * | 2000-06-14 | 2001-03-21 | 重庆宽带网络技术有限公司 | Debugging method of wired TV network transmission equipment |
| CN101365145A (en) * | 2008-10-06 | 2009-02-11 | 广州杰赛科技股份有限公司 | Cable television network monitoring system and monitoring method |
| CN201699856U (en) * | 2010-04-28 | 2011-01-05 | 福建捷联电子有限公司 | Signal wireless transmission system used during television debugging process |
| EP2899968A1 (en) * | 2014-01-22 | 2015-07-29 | Sistemas Integrados de Servicios de Telecontrol, S.L. | Method and device for detecting egress noise in cable television systems |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1288333A (en) * | 2000-06-14 | 2001-03-21 | 重庆宽带网络技术有限公司 | Debugging method of wired TV network transmission equipment |
| CN101365145A (en) * | 2008-10-06 | 2009-02-11 | 广州杰赛科技股份有限公司 | Cable television network monitoring system and monitoring method |
| CN201699856U (en) * | 2010-04-28 | 2011-01-05 | 福建捷联电子有限公司 | Signal wireless transmission system used during television debugging process |
| EP2899968A1 (en) * | 2014-01-22 | 2015-07-29 | Sistemas Integrados de Servicios de Telecontrol, S.L. | Method and device for detecting egress noise in cable television systems |
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