CN203984560U - A kind of cable television network low pass circuit signal processing apparatus - Google Patents
A kind of cable television network low pass circuit signal processing apparatus Download PDFInfo
- Publication number
- CN203984560U CN203984560U CN201420396540.1U CN201420396540U CN203984560U CN 203984560 U CN203984560 U CN 203984560U CN 201420396540 U CN201420396540 U CN 201420396540U CN 203984560 U CN203984560 U CN 203984560U
- Authority
- CN
- China
- Prior art keywords
- circuit
- cable television
- television network
- low pass
- processing apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The utility model relates to a kind of cable television network low pass circuit signal processing apparatus, comprise splitter, high pass filter, amplifier comparator and change over switch, low pass circuit comprises main line circuit and branch circuit, splitter is installed in low pass circuit, branch circuit is provided with high pass filter and amplifier comparator, and the junction of close signal input part, main line and branch circuit is provided with change over switch.The utility model can automatically be closed user side and be uploaded standby low frequency signal, has avoided the interference of too much hash to cable television network center.
Description
Technical field
The utility model relates to cable television network field, particularly relates to a kind of cable television network low pass circuit signal processing apparatus.
Background technology
In recent years, cable television network develop rapidly, conventionally cable television system comprises front end system, transmission system and user side, generally, network signal from user side to cable television network transmission user signal, is transferred to user side by high pass circuit by the network signal of cable television network by low pass circuit.
Existing cable television network generally can receive all signals that user side transmits, when user's TV is during in holding state, user side still can transmit low frequency signal to cable television network, each signal that cable television network receives and processes, the low frequency signal producing during standby can disturb the normal work at cable television network center, has increased workload and the error rate at cable television network center.
How to found a kind of when user side is not used cable television network automatic shutdown signal upload, avoid cable television network to be subject to the new cable television network low pass circuit signal processing apparatus of the interference of hash, real one of the current important research and development problem that belongs to.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of cable television network low pass circuit signal processing apparatus, its automatic shutdown signal when user side is not used cable television network is uploaded, avoid cable television network to be subject to the interference of hash, and do not affect user side and normally use, thereby overcome existing cable television network center, be vulnerable to the deficiency that hash disturbs.
For solving the problems of the technologies described above, the utility model provides a kind of cable television network low pass circuit signal processing apparatus, comprise splitter, high pass filter, amplifier comparator and change over switch, described low pass circuit comprises main line circuit and branch circuit two parts, near in the low pass circuit of signal output part, splitter is installed, branch circuit is provided with high pass filter and amplifier comparator, main line circuit, branch circuit and cable television network are connected with change over switch respectively, and described change over switch is also connected with earthed circuit.
Described amplifier comparator is SGM8052XMS amplifier comparator.
On described earthed circuit, be connected with load.
Adopt after such design, the utility model at least has the following advantages:
When the signal frequency of user side is lower, user side is generally in holding state, the signal that standby signal all uploads to cable television network Hui Dui network center causes larger interference, affect normal signal judgement, the utility model is set with connection value and cut off value, when signal is too low, user side low pass circuit ground connection, user side signal cannot upload to cable television network, has avoided the interference of too much hash to cable television network center, is conducive to improve the operating efficiency at cable television network center.
When user side need be used cable television network, low pass circuit can automatic switching on, neither affects user's normal use, can avoid again standby signal to disturb central site network.
Connection value of the present utility model, higher than cut off value, is just closed low pass circuit transfer of data when the signal of lower frequency, avoids the trickle wrong inconvenience that transfer of data causes to user of turning off of fluctuating because of user side; Connection value and cut off value can be selected to set according to actual needs.
This apparatus structure is simple, easy for installation, and cost is low, and strong adaptability can solve the interference signal of cable television network by increasing a little device, be worth promoting.
Accompanying drawing explanation
Above-mentioned is only the general introduction of technical solutions of the utility model, and in order to better understand technological means of the present utility model, below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
Fig. 1 is the structural representation of a kind of cable television network low pass circuit of the utility model signal processing apparatus.
Embodiment
The utility model provides a kind of cable television network low pass circuit signal processing apparatus, comprise splitter 3, high pass filter 4, amplifier comparator 5 and change over switch 6, described low pass circuit comprises main line circuit 1 and branch circuit 2 two parts, near in the low pass circuit of signal output part, splitter 3 is installed, branch circuit 2 is provided with high pass filter 4 and amplifier comparator 5, main line circuit 1, branch circuit 2 and cable television network are connected with change over switch 6 respectively, and described change over switch is also connected with earthed circuit.
On described earthed circuit, be connected with load.
Described amplifier comparator 5 can be selected SGM8052XMS amplifier comparator.
The signal of user side output is after filter filters, and low frequency signal is transferred in low pass circuit, through splitter 3, is divided into two parts, and the main signal that user side is uploaded of branch circuit detects, judgement.First, output signal is through high pass filter 4 on branch circuit 2, and high pass filter 4 filters out noise signal, in the present embodiment, described high pass filter is the high pass filter of 16MHz, the filtration of the signal that can be 5-16MHz by frequency, amount of information and the error rate of minimizing amplifier comparator.Signal enters amplifier comparator 5 and judges after high pass filter filters, first, set connection value and cut off value, in the present embodiment, establishing connection value is 15dBmV, and cut off value is 12dBmV, when voltage in low pass circuit is non-vanishing, when if the signal detecting is more than or equal to 15dBmV, the contact R FC of change over switch is connected with contact R F1, and main line circuit 1 is communicated with, and signal can be transferred to cable television network from user side; When if the signal detecting is less than or equal to 12dBmV, change over switch contact R F1 is connected with RF2, main line circuit ground, and signal can not be transferred to cable television network from user side; When if the signal detecting is greater than 12dBmV and is less than 15dBmV, low pass circuit keeps its original connection status constant; If the voltage in low pass circuit is zero, the contact R FC of change over switch 6 is connected with contact R F1, and low pass circuit is connected with cable television network.
This device can be set to the low pass of high pass, when higher frequency signals being detected, just opens low pass circuit, just closes low pass circuit when low frequency signals being detected, and the mistake that opens by mistake of having avoided the trickle fluctuation because of user side to cause is closed.
The above; it is only preferred embodiment of the present utility model; not the utility model is done to any pro forma restriction, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in protection range of the present utility model.
Claims (3)
1. a cable television network low pass circuit signal processing apparatus, it is characterized in that: comprise splitter, high pass filter, amplifier comparator and change over switch, described low pass circuit comprises main line circuit and branch circuit two parts, near in the low pass circuit of signal output part, splitter is installed, branch circuit is provided with high pass filter and amplifier comparator, main line circuit, branch circuit and cable television network are connected with change over switch respectively, and described change over switch is also connected with earthed circuit.
2. a kind of cable television network low pass circuit signal processing apparatus according to claim 1, is characterized in that: described amplifier comparator is SGM8052XMS amplifier comparator.
3. a kind of cable television network low pass circuit signal processing apparatus according to claim 1, is characterized in that: on described earthed circuit, be connected with load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420396540.1U CN203984560U (en) | 2014-07-17 | 2014-07-17 | A kind of cable television network low pass circuit signal processing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420396540.1U CN203984560U (en) | 2014-07-17 | 2014-07-17 | A kind of cable television network low pass circuit signal processing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203984560U true CN203984560U (en) | 2014-12-03 |
Family
ID=51981975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420396540.1U Expired - Fee Related CN203984560U (en) | 2014-07-17 | 2014-07-17 | A kind of cable television network low pass circuit signal processing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203984560U (en) |
-
2014
- 2014-07-17 CN CN201420396540.1U patent/CN203984560U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203894394U (en) | Power supply circuit and electronic apparatus provided with current monitoring function | |
| CN103066693A (en) | Intelligent terminal for power distribution network | |
| CN203399204U (en) | Embedded network hard disk video recorder and network hard disk video recording system | |
| CN203984560U (en) | A kind of cable television network low pass circuit signal processing apparatus | |
| CN106249802A (en) | A kind of household electrical appliance anti-tripping operation instruction system | |
| CN108417005A (en) | A kind of kilowatt meter reading-out system based on wireless transmission | |
| CN206039608U (en) | Purifier management system based on cloud platform | |
| CN205123764U (en) | Possess optoelectronic isolation and prevent that RS485 communication bus from accounting for electric power instrument of dead trouble function | |
| CN104092970A (en) | Low-pass circuit signal processing method and device for cable television network | |
| CN104467920A (en) | Power line carrier communication device | |
| CN204652035U (en) | A kind of Signal Detecting Circuit for Automatic Transfer Switching Equipment | |
| CN204065791U (en) | Based on the air lock automatic control system of wireless sensor network | |
| CN204216663U (en) | A kind of two incoming line cabinets one get in touch with the automatic switching device of cabinet electric power system | |
| CN204030723U (en) | Based on the distribution controller of CAN | |
| CN208420893U (en) | A kind of water quality detection system | |
| CN203661079U (en) | 485 signal line reverse connection automatic recognition correction circuit | |
| CN202275503U (en) | Intelligent terminal of distribution network | |
| CN204408528U (en) | Supervisory control system | |
| CN203747864U (en) | DTU (data transfer unit) with multiple SIM card data terminals based on mobile communication | |
| CN202353676U (en) | AV (audio/video) host and backup switcher | |
| CN203812009U (en) | Instrument communication serial port multiplex control device | |
| CN204316631U (en) | A kind of separate type tuner interface circuit | |
| CN104253966A (en) | Return path noise reducing amplifier with bypass signal | |
| CN204177503U (en) | Bluetooth turns M-BUS calorimeter data acquisition unit | |
| CN205749667U (en) | Carrier channel circuit and the intelligent electric meter batch meter system of application carrier channel circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20191018 Granted publication date: 20141203 |
|
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20221018 Granted publication date: 20141203 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 |