CN107450942B - Intelligent network upgrading device and control method thereof - Google Patents
Intelligent network upgrading device and control method thereof Download PDFInfo
- Publication number
- CN107450942B CN107450942B CN201710522952.3A CN201710522952A CN107450942B CN 107450942 B CN107450942 B CN 107450942B CN 201710522952 A CN201710522952 A CN 201710522952A CN 107450942 B CN107450942 B CN 107450942B
- Authority
- CN
- China
- Prior art keywords
- switch
- circuit
- adjustable equalizer
- equalizing
- controllable attenuator
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/60—Software deployment
- G06F8/65—Updates
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
- H04L41/082—Configuration setting characterised by the conditions triggering a change of settings the condition being updates or upgrades of network functionality
Abstract
An intelligent network upgrading device comprises a responder, a central processing unit, a first adjustable equalizer, a first radio frequency amplifier, a second adjustable equalizer, a second radio frequency amplifier and a current control module which are connected in sequence from signal input to output; the other ends of the second adjustable equalizer and the current control module are respectively connected with the central processing unit; the first adjustable equalizer is provided with at least two equalizing circuits with different frequency widths, and the second adjustable equalizer is provided with equalizing circuits which are in one-to-one correspondence with the equalizing circuits of the first adjustable equalizer. When upgrading, the central processing unit is switched to the corresponding frequency width equalizing circuit only by control, then the current control module controls the current passing through the third radio frequency amplifier according to the frequency width of the equalizing circuit, the optimal power consumption of the system is adjusted, and the problems that the device uses larger current, generates high power consumption, wastes energy and the like can be avoided.
Description
Technical Field
The invention relates to the technical field of cable television networks, in particular to an intelligent network upgrading device and a control method thereof.
Background
The current cable television system operator, when laying out the network, mainly lays out the line according to the current and future circuit bandwidth requirement, currently, many lines with 870MHz and 1003MHz bandwidth are laid on the market, however, with the development of technology and the demand of users for high-bandwidth and high-transmission-efficiency lines, more and more products with high-bandwidth lines are produced, however, the existing product needs to be upgraded from low bandwidth to high bandwidth, only the part related to the bandwidth of the product can be replaced, which wastes time and labor, and has high upgrading cost and low efficiency, at the same time, the current passing through the product cannot be selectively controlled according to the bandwidth of the product, so that the product cannot be always in a state of low power consumption, therefore, the problem of energy waste of the upgraded product still exists, and therefore a network upgrading device which is low in upgrading cost, fast and convenient to upgrade and adjustable in power consumption is urgently needed to be designed.
Disclosure of Invention
The invention provides an intelligent network upgrading device which is low in upgrading cost, high in upgrading efficiency and adjustable in power consumption.
The technical scheme adopted by the invention is as follows: an intelligent network upgrading device comprises a responder, a central processing unit, a first adjustable equalizer, a first radio frequency amplifier, a second adjustable equalizer, a second radio frequency amplifier and a current control module which are connected in sequence from signal input to output; the other ends of the second adjustable equalizer and the current control module are respectively connected with the central processing unit; the first adjustable equalizer is provided with at least two equalizing circuits with different frequency widths, and the second adjustable equalizer is provided with equalizing circuits which are in one-to-one correspondence with the equalizing circuits of the first adjustable equalizer.
After the design is adopted, compared with the prior art, the invention has the following advantages:
the first adjustable equalizer and the second adjustable equalizer are provided with at least two equalizing circuits with different frequency widths, so that when upgrading is carried out, only the central processing unit is required to be switched to the corresponding frequency width equalizing circuits through control, then the current control module controls the current passing through the third radio frequency amplifier according to the frequency widths of the equalizing circuits, the optimal power consumption of the system is adjusted, and the problems that the device uses larger current, generates high power consumption, wastes energy and the like can be avoided.
As an improvement, the first adjustable equalizer and the second adjustable equalizer respectively comprise a 1003MHZ equalizing circuit, a 1218MHZ equalizing circuit, a switch 1 and a switch 2; the common end of the switch 1 is connected with the central processing unit, the common end of the switch 2 is connected with the first radio frequency amplifier, the normally closed end of the switch 1 is connected with the 1003MHZ equalizing circuit, and the normally open end of the switch 1 is connected with the 1218MHZ equalizing circuit; the normally closed end of the switch 2 is connected with the other end of the 1003MHZ equalizing circuit, and the normally open end is connected with the other end of the 1218MHZ equalizing circuit. The 1003MHZ equalizing circuit is a type of equalizing circuit which is commonly used in the market at present, and the 1218MHZ equalizing circuit is used as a standby upgrading circuit.
As an improvement, the first adjustable equalizer comprises a controllable attenuator, one end of the controllable attenuator is connected with the common end of the switch 1, and the other end of the controllable attenuator is connected with the common end of the switch 2; or the second adjustable equalizer comprises a controllable attenuator, one end of the controllable attenuator is connected with the common end of the switch 1, and the other end of the controllable attenuator is connected with the common end of the switch 2. The controllable attenuator is used for adjusting the signal size in the circuit and improving impedance matching.
As an improvement, the first adjustable equalizer comprises a first controllable attenuator and a second controllable attenuator, one end of the first controllable attenuator is connected with the 1003MHZ equalization circuit, the other end of the first controllable attenuator is connected with the normally closed end of the switch 2, one end of the second controllable attenuator is connected with the 1218MHZ equalization circuit, and the other end of the second controllable attenuator is connected with the normally open end of the switch 2; or the second adjustable equalizer comprises a first controllable attenuator and a second controllable attenuator, one end of the first controllable attenuator is connected with the 1003MHZ equalizing circuit, the other end of the first controllable attenuator is connected with the normally closed end of the switch 2, one end of the second controllable attenuator is connected with the 1218MHZ equalizing circuit, the other end of the second controllable attenuator is connected with the normally open end of the switch 2, and the two controllable attenuators are arranged to further improve impedance matching.
As an improvement, the intelligent network upgrading device further comprises a compensation circuit module and a third radio frequency amplifier which are sequentially connected, the other end of the compensation circuit module is connected with the other end of the first radio frequency amplifier, the other end of the third radio frequency amplifier is connected with one end of the second adjustable equalizer, the compensation circuit module is provided with compensation circuits which are in one-to-one correspondence with the equalization circuits of the first adjustable equalizer, and the compensation circuits are used for compensating drift generated by the equalization circuits and ensuring gain stability of the equalization circuits.
As an improvement, the compensation circuit module comprises a 1003MHZ compensation circuit, a 1218MHZ compensation circuit, a switch 5, a switch 6 and a low-pass filter circuit; the public end of the switch 5 is connected with the central processing unit, the normally closed end is connected with the 1003MHZ compensation circuit, and the normally open end is connected with the 1218MHZ compensation circuit; the other end of the 1003MHZ compensation circuit is connected with a low-pass filter circuit, and the other end of the low-pass filter circuit is connected with the normally-closed end of the switch 6; the normally open end of the switch 6 is connected with the other end of the 1218MHZ compensation circuit, the common end is connected with the central processing unit, and the low-pass tube filter circuit is used for filtering impurity signals in the circuit and ensuring the transmission quality of the signals.
As an improvement, the current control module comprises a digital-to-analog conversion chip and an operational amplifier which are connected in sequence, the other end of the digital-to-analog conversion chip is connected with the central processing unit, and the other end of the operational amplifier is connected with the other end of the second radio frequency amplifier. The central processing unit transmits the digital signal to the current control module after receiving an upgrade command from a field or remote control, and a digital-to-analog conversion chip in the current control module is used for converting the received digital signal into an analog voltage and generating an actual voltage for controlling the second radio-frequency amplifier through the operational amplifier, so that the purposes of controlling the current of the second radio-frequency amplifier and adjusting the power consumption of the output end of the second radio-frequency amplifier are achieved.
The invention also provides a control method of the intelligent network upgrading device, which is characterized by comprising the following steps,
s1, sending an upgrade command to the central processing unit in a remote control or field connection mode, wherein the central processing unit receives the upgrade command and then controls the equalizing circuit of the first adjustable equalizer to switch, and the second adjustable equalizer switches to the equalizing circuit with the corresponding bandwidth according to the bandwidth selection of the equalizing circuit of the first equalizer;
s2, the CPU controls the compensation circuit module to switch the compensation circuit, the bandwidth of the compensation circuit is corresponding to the bandwidth of the equalizing circuit;
and S3, the CPU controls the current control module to adjust the current passing through the second RF amplifier according to the bandwidth of the equalizer circuit, thereby adjusting the current at the output end of the second RF amplifier.
Compared with the prior art, the invention has the following advantages after adopting the control method:
the upgrading command sent to the central processing unit can be controlled in a remote control mode or a field connection mode, and the control modes are more, so that different upgrading methods can be used according to different positions of workers and products, and the upgrading method is strong in universality and high in upgrading efficiency.
As an improvement, in the step S1, the remote control is specifically implemented by first sending the upgrade command to the transponder through the machine room, and then sending the upgrade command to the central processing unit after the upgrade command is received by the transponder. By adopting the control method, a worker can upgrade the intelligent network upgrading device in a machine room, so that outdoor operation is avoided, and the intelligent network upgrading device is time-saving, labor-saving, convenient and quick.
As an improvement, the field connection in step S1 is specifically that the field directly sends the upgrade command to the central processing unit through connecting USB, RJ45, RS232 interfaces on the central processing unit. By adopting the control method, the staff can be directly connected with the intelligent network upgrading device through the USB interface, the RJ45 interface and the RS232 interface to send an upgrading command to the intelligent network upgrading device, so that the upgrading is realized. The field upgrading is more intuitive, and whether the device upgrading is successful or not can be checked in time after the upgrading.
Drawings
FIG. 1 shows a first structure of an adjustable equalizer
FIG. 2 is a second architecture for an adjustable equalizer
FIG. 3 is a schematic diagram of a current control module
FIG. 4 is a schematic diagram of an amplifier including an intelligent network upgrade device
FIG. 5 is a schematic diagram of an optical station including an intelligent network upgrade apparatus
Detailed Description
As shown in fig. 1 to 5, an intelligent network upgrade apparatus, from signal input to output direction, includes a transponder, a central processing unit, a first adjustable equalizer, a first radio frequency amplifier, a second adjustable equalizer, a second radio frequency amplifier, and a current control module, which are connected in sequence; the other ends of the second adjustable equalizer and the current control module are respectively connected with the central processing unit, and the third end of the second adjustable equalizer is a signal output end; the first adjustable equalizer is provided with at least two equalizing circuits with different frequency widths, and the second adjustable equalizer is provided with equalizing circuits which are in one-to-one correspondence with the equalizing circuits of the first adjustable equalizer.
The first adjustable equalizer and the second adjustable equalizer respectively comprise a 1003MHZ equalizing circuit, a 1218MHZ equalizing circuit, a switch 1 and a switch 2; the common end of the switch 1 is connected with the central processing unit to serve as an input end, the common end of the switch 2 is connected with the first radio frequency amplifier to serve as an output end, the normally closed end of the switch 1 is connected with the 1003MHZ equalizing circuit, and the normally open end of the switch 1 is connected with the 1218MHZ equalizing circuit; the normally closed end of the switch 2 is connected with the other end of the 1003MHZ equalizing circuit, and the normally open end is connected with the other end of the 1218MHZ equalizing circuit. As shown in fig. 1 and fig. 2, the first adjustable equalizer and the second adjustable equalizer both have two structures, and the first structure includes a controllable attenuator, one end of which is connected to the common terminal of the switch 1, and the other end of which is connected to the common terminal of the switch 2; the second structure is that the second structure comprises a first controllable attenuator and a second controllable attenuator, wherein one end of the first controllable attenuator is connected with a 1003MHZ equalizing circuit, and the other end of the first controllable attenuator is connected with a normally closed end of a switch 2; one end of the second controllable attenuator is connected with the 1218MHZ equalizing circuit, and the other end is connected with the normally open end of the switch 2. The first adjustable equalizer and the second adjustable equalizer may both use the first structure, may both use the second structure, and may also use the first structure or the second structure for the first adjustable equalizer, and the second adjustable equalizer may correspondingly use the second structure or the first structure. The invention presets the equalizing circuits with different frequency widths in the first adjustable equalizer and the second adjustable equalizer, so that the components such as the adjustable equalizer do not need to be replaced in the subsequent upgrading process, the upgrading can be directly carried out, and the method is simple, quick and high in upgrading efficiency.
The intelligent network upgrading device further comprises a compensation circuit module and a third radio frequency amplifier which are sequentially connected, the other end of the compensation circuit module is connected with the other end of the first radio frequency amplifier, the other end of the third radio frequency amplifier is connected with one end of the second adjustable equalizer, and the compensation circuit module is provided with compensation circuits which are in one-to-one correspondence with the equalization circuits of the first adjustable equalizer. The compensation circuit module comprises a 1003MHZ compensation circuit, a 1218MHZ compensation circuit, a switch 5, a switch 6 and a low-pass filter circuit; the public end of the switch 5 is connected with the central processing unit, the normally closed end is connected with the 1003MHZ compensation circuit, and the normally open end is connected with the 1218MHZ compensation circuit; the other end of the 1003MHZ compensation circuit is connected with a low-pass filter circuit, and the other end of the low-pass filter circuit is connected with the normally-closed end of the switch 6; the normally open end of the switch 6 is connected with the other end of the 1218MHZ compensation circuit, and the public end is connected with the central processing unit. The compensation circuit is used for compensating drift generated in the circuit, and the low-pass filter circuit is used for filtering impurity signals in the circuit and ensuring the transmission quality of the signals.
As shown in fig. 3, the current control module includes a digital-to-analog conversion chip and an operational amplifier, which are connected in sequence, wherein the other end of the digital-to-analog conversion chip is connected to the central processing unit, and the other end of the operational amplifier is connected to the other end of the second radio frequency amplifier. The digital-to-analog conversion chip can be selected from an MCP4728 type, the operational amplifier can be selected from an LM2904 type, the central processing unit transmits digital signals to the current control module after receiving an upgrade command from a machine room or a site, the digital-to-analog conversion chip in the current control module is used for converting the received digital signals into analog voltage, and actual voltage for controlling the second radio-frequency amplifier is generated through the operational amplifier, so that the purposes of controlling the current of the second radio-frequency amplifier and adjusting the power consumption of the output end of the second radio-frequency amplifier are achieved. When the network is laid, if a user selects to use a low-bandwidth network signal, the current control module controls the current of the second radio-frequency amplifier to adapt to the low-bandwidth equalizing circuit, if the bandwidth of the device is upgraded to a high-bandwidth, the current control module controls the current of the second radio-frequency amplifier to adapt to the high-bandwidth equalizing circuit, and the current output by the output end of the second radio-frequency amplifier affects the overall power consumption of the device.
The invention also provides a control method of the intelligent network upgrading device, which comprises the following steps,
s1, sending an upgrade command to the central processing unit in a remote control or field connection mode, wherein the central processing unit receives the upgrade command and then controls the equalizing circuit of the first adjustable equalizer to switch, and the second adjustable equalizer switches to the equalizing circuit with the corresponding bandwidth according to the bandwidth selection of the equalizing circuit of the first equalizer;
s2, the CPU controls the compensation circuit module to switch the compensation circuit, the bandwidth of the compensation circuit is corresponding to the bandwidth of the equalizing circuit;
and S3, the CPU controls the current control module to adjust the current passing through the second RF amplifier according to the bandwidth of the equalizer circuit, thereby adjusting the current at the output end of the second RF amplifier.
The remote control in step S1 is specifically that the upgrade command is sent to the responder through the machine room, and the responder receives the upgrade command and then sends the upgrade command to the central processing unit. The remote control can avoid outdoor operation, and is time-saving, labor-saving, convenient and fast.
The field connection in step S1 is specifically that the field directly sends the upgrade command to the cpu through USB, RJ45, and RS232 interfaces connected to the cpu. The USB interface is a universal serial bus, the RJ45 interface is an Ethernet interface, and the RS232 interface is a serial data communication interface. The field upgrading is suitable for the situation that a worker is relatively close to the device and relatively far away from the machine room, and the field upgrading is relatively visual, so that whether the device upgrading is completely successful or not can be checked in time after the upgrading.
As shown in fig. 4 and 5, the present invention can be used in products such as amplifiers and optical stations that need to be upgraded, and the power consumption of the products can be adjusted through the current control module, and has the advantages of strong universality, simple upgrading mode, low upgrading cost and high upgrading efficiency.
The above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the present invention can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for the technical features of each part thereof, for example, the current control module can correspondingly adjust the power consumption of the device to a lower state according to the requirement of the user, that is, the device is degraded from a high bandwidth to a low bandwidth, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the present invention.
Claims (9)
1. An intelligent network upgrading device is characterized by comprising a responder, a central processing unit, a first adjustable equalizer, a first radio frequency amplifier, a second adjustable equalizer, a second radio frequency amplifier and a current control module which are sequentially connected from signal input to signal output; the other ends of the second adjustable equalizer and the current control module are respectively connected with the central processing unit; the first adjustable equalizer is provided with at least two equalizing circuits with different frequency widths, and the second adjustable equalizer is provided with equalizing circuits which correspond to the equalizing circuits of the first adjustable equalizer one by one;
the radio frequency equalizer further comprises a compensation circuit module and a third radio frequency amplifier which are sequentially connected, the other end of the compensation circuit module is connected with the other end of the first radio frequency amplifier, the other end of the third radio frequency amplifier is connected with one end of the second adjustable equalizer, and the compensation circuit module is provided with compensation circuits which are in one-to-one correspondence with the equalization circuits of the first adjustable equalizer.
2. An intelligent network upgrade apparatus according to claim 1, wherein said first and second adjustable equalizers each comprise 1003MHZ equalization circuitry, 1218MHZ equalization circuitry, switch 1 and switch 2; the common end of the switch 1 is connected with the central processing unit, the common end of the switch 2 is connected with the first radio frequency amplifier, the normally closed end of the switch 1 is connected with the 1003MHZ equalizing circuit, and the normally open end of the switch 1 is connected with the 1218MHZ equalizing circuit; the normally closed end of the switch 2 is connected with the other end of the 1003MHZ equalizing circuit, and the normally open end is connected with the other end of the 1218MHZ equalizing circuit.
3. An intelligent network upgrade apparatus according to claim 2, wherein said first adjustable equalizer comprises a controllable attenuator, one end of said controllable attenuator is connected to the common terminal of switch 1, and the other end is connected to the common terminal of switch 2; or the second adjustable equalizer comprises a controllable attenuator, one end of the controllable attenuator is connected with the common end of the switch 1, and the other end of the controllable attenuator is connected with the common end of the switch 2.
4. An intelligent network upgrade apparatus according to claim 2, wherein said first adjustable equalizer comprises a first controllable attenuator and a second controllable attenuator, said first controllable attenuator is connected to the 1003MHZ equalization circuit at one end and to the normally closed end of switch 2 at the other end, said second controllable attenuator is connected to the 1218MHZ equalization circuit at one end and to the normally open end of switch 2 at the other end; or the second adjustable equalizer comprises a first controllable attenuator and a second controllable attenuator, one end of the first controllable attenuator is connected with the 1003MHZ equalizing circuit, the other end of the first controllable attenuator is connected with the normally closed end of the switch 2, one end of the second controllable attenuator is connected with the 1218MHZ equalizing circuit, and the other end of the second controllable attenuator is connected with the normally open end of the switch 2.
5. An intelligent network upgrade apparatus according to claim 1, wherein said compensation circuit module comprises 1003MHZ compensation circuit, 1218MHZ compensation circuit, switch 5, switch 6 and low pass filter circuit; the public end of the switch 5 is connected with the central processing unit, the normally closed end is connected with the 1003MHZ compensation circuit, and the normally open end is connected with the 1218MHZ compensation circuit; the other end of the 1003MHZ compensation circuit is connected with a low-pass filter circuit, and the other end of the low-pass filter circuit is connected with the normally-closed end of the switch 6; the normally open end of the switch 6 is connected with the other end of the 1218MHZ compensation circuit, and the public end is connected with the central processing unit.
6. The intelligent network upgrading device according to claim 1, wherein the current control module comprises a digital-to-analog conversion chip and an operational amplifier which are connected in sequence, the other end of the digital-to-analog conversion chip is connected with the central processing unit, and the other end of the operational amplifier is connected with the other end of the second radio frequency amplifier.
7. A control method of an intelligent network upgrading device is characterized by comprising the following steps,
s1, sending an upgrade command to the central processing unit in a remote control or field connection mode, wherein the central processing unit receives the upgrade command and then controls the equalizing circuit of the first adjustable equalizer to switch, and the second adjustable equalizer switches to the equalizing circuit with the corresponding bandwidth according to the bandwidth selection of the equalizing circuit of the first equalizer;
s2, the CPU controls the compensation circuit module to switch the compensation circuit, the bandwidth of the compensation circuit is corresponding to the bandwidth of the equalizing circuit;
and S3, the CPU controls the current control module to adjust the current passing through the second RF amplifier according to the bandwidth of the equalizer circuit, thereby adjusting the current at the output end of the second RF amplifier.
8. The method as claimed in claim 7, wherein the step S1 is implemented by sending an upgrade order to the responder through the computer room, and sending the upgrade order to the central processing unit after the responder receives the upgrade order.
9. The method as claimed in claim 7, wherein the field connection in step S1 is performed by directly sending the upgrade command to the cpu through USB, RJ45, RS232 interfaces of the cpu.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710522952.3A CN107450942B (en) | 2017-06-30 | 2017-06-30 | Intelligent network upgrading device and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710522952.3A CN107450942B (en) | 2017-06-30 | 2017-06-30 | Intelligent network upgrading device and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107450942A CN107450942A (en) | 2017-12-08 |
| CN107450942B true CN107450942B (en) | 2021-01-19 |
Family
ID=60487490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710522952.3A Active CN107450942B (en) | 2017-06-30 | 2017-06-30 | Intelligent network upgrading device and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107450942B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202713502U (en) * | 2012-09-06 | 2013-01-30 | 宁波环球广电科技有限公司 | Upgrade type frequency module for cable television network |
| WO2014081571A1 (en) * | 2012-11-26 | 2014-05-30 | Analog Devices, Inc. | Apparatus and methods for equalization |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102395021A (en) * | 2011-10-26 | 2012-03-28 | 常熟市高事达光电科技有限公司 | CATV (Cable Television) amplifier capable of being upgraded to EOC (Ethernet Over Coax) local-side optical receiver circuit |
| US9747236B2 (en) * | 2015-04-07 | 2017-08-29 | Vanco International, Llc | HDMI extender with bidirectional power over twisted pair |
-
2017
- 2017-06-30 CN CN201710522952.3A patent/CN107450942B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202713502U (en) * | 2012-09-06 | 2013-01-30 | 宁波环球广电科技有限公司 | Upgrade type frequency module for cable television network |
| WO2014081571A1 (en) * | 2012-11-26 | 2014-05-30 | Analog Devices, Inc. | Apparatus and methods for equalization |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107450942A (en) | 2017-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101043239B (en) | System for biasing T-shaped head and controlling antenna | |
| CN103973396A (en) | Method and device for transmitting wireless base band data and radio frequency zooming-out module RRU | |
| CN102104888B (en) | Control system for electric tuning antenna of base station | |
| CN112804691A (en) | Indoor distribution system and signal transmission method | |
| CN105553730A (en) | Implementing method and implementing device for upgrade of gateway type EoC terminal firmware | |
| CN105409274A (en) | Method for establishing correspondence between sector of base station and antenna, base station, and antenna | |
| CN104144432A (en) | GSM-R micro-power optical fiber distributed device | |
| CN107450942B (en) | Intelligent network upgrading device and control method thereof | |
| EP2178336A1 (en) | A method, device and base station system for base station compatible with high gain tower mounted amplifier | |
| CN104378101A (en) | Diverter switch for channel test, method and system | |
| CN109348493B (en) | High-reliability wireless communication system link backup device and control method thereof | |
| CN111030641A (en) | Bidirectional radio frequency level adjusting circuit for EOC and control method thereof | |
| CN210609089U (en) | Bidirectional radio frequency level adjusting circuit for EOC | |
| CN102064889A (en) | Digital frequency-selecting repeater for in-band fluctuation compensation and compensation method | |
| CN110808784A (en) | Outdoor 5G micro-station system based on broadcasting and TV HFC network | |
| CN103914010A (en) | Radio-frequency change-over switch capable of keeping original communication state when powered off | |
| CN205810096U (en) | Television terminal and the remote control system of television terminal | |
| CN103346818A (en) | HFC gain adjustment method, HFC transponder and HFC response system | |
| CN114401161B (en) | Communication optimizing equipment, method and communication system based on two buses | |
| CN207475567U (en) | A kind of automatically controlled smooth AGC type back transmission optical receiver of high density | |
| CN108964928B (en) | Wireless MOCA terminal equipment, feed equipment and self-adaptive feed method thereof | |
| JPH0461428A (en) | High frequency signal changeover circuit | |
| EP3723295B1 (en) | Transmitting device and signal transmission method | |
| CN107769843B (en) | Circuit reconfiguration method and device | |
| US10983938B2 (en) | Field bus system for driving power outputs |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |