CN200947602Y - Modem of four-line E/M interface based on fiber/microwave transmission - Google Patents
Modem of four-line E/M interface based on fiber/microwave transmission Download PDFInfo
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- CN200947602Y CN200947602Y CNU2006200445345U CN200620044534U CN200947602Y CN 200947602 Y CN200947602 Y CN 200947602Y CN U2006200445345 U CNU2006200445345 U CN U2006200445345U CN 200620044534 U CN200620044534 U CN 200620044534U CN 200947602 Y CN200947602 Y CN 200947602Y
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Abstract
The utility model discloses a modem with four-wire E/M interface based on the fiber/microwave transmission, which comprises a four-wire E/M interface module, a radio station interface module and a computer interface module. An E/M signal control module completes the transformation between the E/M signals and the radio receiving control signals and between the radio controlling and launching signals and the computer sending signals. A first amplifying circuit and a second amplifying circuit amplify the signals that exit and enter the four-wire E/M interface module and a modulation demodulation module modulates and demodulates the signals that exit and enter the computer interface module. A switch selecting circuit controls the transformation of data among the four-wire E/M interface module, the radio station interface module and the computer interface module according to the E/M signals and the radio receiving control signals and the radio controlling and launching signals and the computer sending signals.
Description
Technical field
The utility model relates to the modulator-demodulator based on four line E/M interfaces of optical fiber/microwave transmission, belongs to the narrow-band FM communications field.
Background technology
Power industry " load monitoring management system " is often used the networking mode of main platform-relay station-terminal, by the radio station radio channel, finishes remote data-transformation facility.But actual conditions are users has often set up optical fiber/microwave line between main platform-relay station, and the use wireless mode then causes the waste on the resource, and uses the communication error rate of optical fiber/microwave mode transfer ratio wireless mode lower, and communication quality is better.Also have at present and adopt special line MODEM mode in optical fiber, to transmit data, but this kind mode can only transmission of digital signals, can't the transporting speech signal.
Summary of the invention
Problem to be solved in the utility model provides a kind of modulator-demodulator of four line E/M interfaces based on optical fiber/microwave transmission, between main platform-relay station, utilize existing optical fiber/microwave line, by to four line E/M interfaces, radio interface, the control of computer interface and the digital-to-analogue conversion of signal, finish the long-distance transmissions of data/voice.
The utility model is to solve the problems of the technologies described above the modulator-demodulator that the technical scheme that adopts provides a kind of four line E/M interfaces based on optical fiber/microwave transmission, comprising:
Four line E/M interface modules comprise a signal sending end, a signal receiving end, an E signal end and a M signal end;
The radio interface module comprises that a modulation signal transmitting terminal, a restituted signal receiving terminal, a radio station receive control signal end and radio station control signalling end;
Computer Interface Module comprises that a data sending terminal, a data receiver and a computer send signal end;
E/M signal controlling module is connected with Computer Interface Module with four line E/M interface modules, radio interface module, finishes the conversion between E/M signal and radio station reception control signal, radio station control signalling and the computer transmission signal;
First amplifying circuit, its input is connected with the signal receiving end of four line E/M interface modules, and output selects circuit to be connected with the modulation signal transmitting terminal and a switch of radio interface module;
Second amplifying circuit, its input selects circuit to be connected with a switch, and output is connected with the signal sending end of four line E/M interface modules;
The modulation module is selected circuit with input one switch after the data-modulated of Computer Interface Module, transfers to Computer Interface Module after the signal demodulation to be demodulated of perhaps switch being selected circuit to select;
Switch is selected circuit, be connected with first amplification circuit output end, second input amplifier, radio interface module and modulation module, received control signal control between the restituted signal receiving terminal of the signal receiving end of four line E/M interface modules and radio interface module, selecting a signal to be demodulated to input to the modulation module by the radio station, and sent signal end control between the analog output of the restituted signal receiving terminal of radio interface module and modulation module, to select a signal to export to the signal sending end of four line E/M interface modules by computer.
The modulator-demodulator of described four line E/M interfaces based on optical fiber/microwave transmission, wherein, described E/M signal controlling module comprises:
First change-over circuit comprises successively the transistor of the photoelectrical coupler, an inverter and the collector electrode output that connect, and the input of photoelectrical coupler is the E signal, and transistorized collector electrode is output as the radio station control and signals;
Second change-over circuit comprises the NAND gate, inverter and the photoelectrical coupler that connect successively, and the input signal of NAND gate is that computer sends signal and receives control signal through anti-phase radio station, and the output of photoelectrical coupler is the M signal.
The modulator-demodulator of described four line E/M interfaces based on optical fiber/microwave transmission, wherein, described first, second amplifying circuit is the amplifying circuit of Gain Adjustable.
The modulator-demodulator of described four line E/M interfaces based on optical fiber/microwave transmission, wherein, described switch selects circuit to comprise:
First selects circuit, constitute by two analog switches, the input of two analog switches connects respectively through the received signal of the four line E/M interface modules of amplifying and the restituted signal of radio interface module, control end connects the radio station respectively and receives control signal and its inversion signal, and output all connects the analog input end of modulation module;
Second selects circuit, constitute by two analog switches, the input of two analog switches connects the analog output signal of modulation module and the restituted signal of radio interface module respectively, control end connects computer respectively and sends signal and its inversion signal, and output all connects the signal sending end of four line E/M interface modules.
The modulator-demodulator of described four line E/M interfaces based on optical fiber/microwave transmission, wherein, described modulation module comprises a modem chip and a local crystal oscillator, described modem chip comprises a data input pin, a data output end, an analog input end, an analog output, two crystal oscillator inputs; Data input pin is connected with the data sending terminal of Computer Interface Module, and data output end is connected with the data receiver of Computer Interface Module, and the crystal oscillator input is connected with local crystal oscillator.
The utility model can be finished the long-distance transmissions of data/voice by to four line E/M interfaces, radio interface, the control of computer interface and the digital-to-analogue conversion of signal based on the modulator-demodulator of four line E/M interfaces of optical fiber/microwave transmission.
The utility model has the advantages that modulator-demodulator based on four line E/M interfaces of optical fiber/microwave transmission: to existing optical fiber/microwave line between main platform-relay station, can utilize original resource, between main platform-relay station-terminal, realize the networking mode that wireline-wireless combines, finish the data long distance transmission; And can be on same circuit transmission of digital signals and voice signal.
Description of drawings
Below in conjunction with the drawings and specific embodiments feature and advantage of the present utility model are described, wherein:
Fig. 1 is the structured flowchart of the utility model based on the modulator-demodulator of four line E/M interfaces of optical fiber/microwave transmission;
Fig. 2 is a part electricity principle schematic embodiment illustrated in fig. 1;
Fig. 3 is the electrical schematic diagram of the E/M signal controlling module in embodiment illustrated in fig. 1.
Embodiment
Please consult shown in Figure 1ly in conjunction with Fig. 2～Fig. 3, the utility model comprises based on the modulator-demodulator 100 of four line E/M interfaces of optical fiber/microwave transmission:
Four line E/M interface modules 1 as the interface of modulator-demodulator 100 with optical fiber/microwave line, comprise a signal sending end TC, a signal receiving end RC, an E signal end and a M signal end.
Computer Interface Module 3 as the interface of modulator-demodulator 100 with computer, comprises that a data sending terminal TD, a data receiver RD and a computer send signal end RTS.
E/M signal controlling module 4 is connected with Computer Interface Module 3 with four line E/M interface modules 1, radio interface module 2, finishes the conversion between E/M signal and radio station reception control signal CD, radio station control signalling TX and the computer transmission signal RTS.Specifically, be to be radio station control signalling TX, and the radio station is received control signal CD and computer send signal RTS and be converted to the M signal the E conversion of signals.E/M signal controlling module 4 further comprises for this reason: first change-over circuit 41, it comprises the transistor 413 that a photoelectrical coupler 411, an inverter 412, a collector electrode of connection are successively exported, also comprise resistance R 414～R417, the positive input terminal of photoelectrical coupler 411 is the E signal, negative input end is by resistance R 414 connection-12V voltages, and the collector electrode of transistor 413 is output as radio station control signalling TX; Second change-over circuit 42, comprise the NAND gate 421, inverter 422 and the photoelectrical coupler 423 that connect successively, the input signal of NAND gate 421 is that computer sends signal RTS and receives control signal CD through inverter 424 anti-phase radio station, and the output of photoelectrical coupler 423 is the M signal.
First amplifying circuit 5, its input is connected with the signal receiving end RC of four line E/M interface modules 1, output selects circuit 8 to be connected with the modulation signal transmitting terminal TFSK and the switch of radio interface module 2, and the signal from signal receiving end RC output is amplified.Amplifying circuit 5 includes: operational amplifier 51, the input capacitance C50 that is connected operational amplifier 51 end of oppisite phase, resistance R 52, the coupling capacitance C55 that is connected feedback resistance R53, the R54 between operational amplifier 51 end of oppisite phase and the output and is connected operational amplifier 51 outputs, operational amplifier 51 in-phase ends connect a biasing circuit, are made of the resistance R 56, the R57 that are connected between power Vcc and the ground.In amplifying circuit, resistance R 54 is an adjustable resistance, by regulating adjustable resistance R54, the gain of scalable amplifying circuit, and then the size of control analog signal.
Second amplifying circuit 6, its input selects circuit 8 to be connected with switch, and output is connected with the signal sending end TC of four line E/M interface modules, and the signal that is input to signal sending end TC is amplified.Amplifying circuit 6 includes: operational amplifier 61, be connected the input resistance R62 of operational amplifier 61 end of oppisite phase, earth resistance R65 and the coupling capacitance C66 that is connected feedback resistance R63, the R64 between operational amplifier 61 end of oppisite phase and the output and is connected operational amplifier 51 outputs, operational amplifier 61 in-phase ends connect a biasing circuit, are made of the resistance R 67, the R68 that are connected between power Vcc and the ground.In amplifying circuit, resistance R 64 is an adjustable resistance, by regulating adjustable resistance R64, the gain of scalable amplifying circuit, and then the size of control analog signal.
Switch is selected circuit 8, received control signal CD control between the restituted signal receiving terminal RFSK of the signal receiving end RC of four line E/M interface modules 1 and radio interface module 2, selecting a signal to be demodulated to input to modulation module 7 by the radio station, and sent signal end RTS control between the analog output AO of the restituted signal receiving terminal RFSK of radio interface module 2 and modulation module 7, to select a signal to export to the signal sending end TC of four line E/M interface modules 1 by computer.Switch selects circuit 8 to comprise:
First selects circuit 81, constitute by two analog switches 82,83, the input of two analog switches 82,83 passes through the signal RC of the four line E/M interface modules 1 of amplifying and the restituted signal RFSK of radio interface module 2 respectively, control end connects the radio station respectively and receives control signal CD and its inversion signal CD, and output all connects the analog input end AI of modulation module 7;
Second selects circuit 84, constitute by two analog switches 85,86, the input of two analog switches 85,86 connects the analog output signal of modulation module 7 and the restituted signal RFSK of radio interface module 2 respectively, control end connects computer respectively and sends signal RTS and its inversion signal RTS, and output all connects the signal sending end TC of four line E/M interface modules 1.
The utility model by to four line E/M interfaces 1, radio interface 2, the control of computer interface 3 and the digital-to-analogue conversion of signal, is finished the long-distance transmissions of data/voice based on the modulator-demodulator 100 of four line E/M interfaces of optical fiber/microwave transmission.
Claims (5)
1. based on the modulator-demodulator of four line E/M interfaces of optical fiber/microwave transmission, it is characterized in that, comprising:
Four line E/M interface modules comprise a signal sending end (TC), a signal receiving end (RC), an E signal end and a M signal end;
The radio interface module comprises that a modulation signal transmitting terminal (TFSK), a restituted signal receiving terminal (RFSK), a radio station receive control signal end (CD) and radio station control signalling end (TX);
Computer Interface Module comprises that a data sending terminal (TD), a data receiver (RD) and a computer send signal end (RTS);
E/M signal controlling module is connected with Computer Interface Module with four line E/M interface modules, radio interface module, finishes the conversion between E/M signal and radio station reception control signal (CD), radio station control signalling (TX) and the computer transmission signal (RTS);
First amplifying circuit, its input is connected with the signal receiving end (RC) of four line E/M interface modules, and output selects circuit to be connected with the modulation signal transmitting terminal (TFSK) and a switch of radio interface module;
Second amplifying circuit, its input selects circuit to be connected with a switch, and output is connected with the signal sending end (TC) of four line E/M interface modules;
The modulation module is selected circuit with input one switch after the data-modulated of Computer Interface Module, transfers to Computer Interface Module after the signal demodulation to be demodulated of perhaps switch being selected circuit to select;
Switch is selected circuit, with first amplification circuit output end, second input amplifier, radio interface module and modulation module connect, received control signal (CD) control between the restituted signal receiving terminal (RFSK) of the signal receiving end (RC) of four line E/M interface modules and radio interface module, selecting a signal to be demodulated to input to the modulation module by the radio station, and sent four line E/M interface modules are exported in signal end (RTS) control with signal of selection between the analog output of the restituted signal receiving terminal (RFSK) of radio interface module and modulation module signal sending end (TC) by computer.
2. the modulator-demodulator of four line E/M interfaces based on optical fiber/microwave transmission as claimed in claim 1 is characterized in that described E/M signal controlling module comprises:
First change-over circuit comprises successively the transistor of the photoelectrical coupler, an inverter and the collector electrode output that connect, and the input of photoelectrical coupler is the E signal, and transistorized collector electrode is output as radio station control signal (TX);
Second change-over circuit comprises the NAND gate, inverter and the photoelectrical coupler that connect successively, and the input signal of NAND gate is that computer sends signal (RTS) and receives control signal (CD) through anti-phase radio station, and the output of photoelectrical coupler is the M signal.
3. the modulator-demodulator of four line E/M interfaces based on optical fiber/microwave transmission as claimed in claim 1 is characterized in that described first, second amplifying circuit is the amplifying circuit of Gain Adjustable.
4. the modulator-demodulator of four line E/M interfaces based on optical fiber/microwave transmission as claimed in claim 1 is characterized in that, described switch selects circuit to comprise:
First selects circuit, constitute by two analog switches, the input of two analog switches connects respectively through the received signal (RC) of the four line E/M interface modules of amplifying and the restituted signal (RFSK) of radio interface module, control end connects the radio station respectively and receives control signal (CD) and its inversion signal (CD), and output all connects the analog input end of modulation module;
Second selects circuit, constitute by two analog switches, the input of two analog switches connects the analog output signal of modulation module and the restituted signal (RFSK) of radio interface module respectively, control end connects computer respectively and sends signal (RTS) and its inversion signal (RTS), and output all connects the signal sending end (TC) of four line E/M interface modules.
5. the modulator-demodulator of four line E/M interfaces based on optical fiber/microwave transmission as claimed in claim 1, it is characterized in that, described modulation module comprises a modem chip and a local crystal oscillator, described modem chip comprises a data input pin (RDI), a data output end (TDO), an analog input end (AI), an analog output (AO), two crystal oscillator inputs (X1, X2); Data input pin (RDI) is connected with the data sending terminal (TD) of Computer Interface Module, and data output end (TDO) is connected with the data receiver (RD) of Computer Interface Module, and crystal oscillator input (X1, X2) is connected with local crystal oscillator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200445345U CN200947602Y (en) | 2006-08-04 | 2006-08-04 | Modem of four-line E/M interface based on fiber/microwave transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200445345U CN200947602Y (en) | 2006-08-04 | 2006-08-04 | Modem of four-line E/M interface based on fiber/microwave transmission |
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| CN200947602Y true CN200947602Y (en) | 2007-09-12 |
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| CNU2006200445345U Expired - Fee Related CN200947602Y (en) | 2006-08-04 | 2006-08-04 | Modem of four-line E/M interface based on fiber/microwave transmission |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904658A (en) * | 2012-09-21 | 2013-01-30 | 广州海格通信集团股份有限公司 | Radio multi-party using control device and method |
| CN109075858A (en) * | 2016-04-27 | 2018-12-21 | 华为技术有限公司 | Method, coordinator and the terminal node of information are transmitted in light wireless communication network |
-
2006
- 2006-08-04 CN CNU2006200445345U patent/CN200947602Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904658A (en) * | 2012-09-21 | 2013-01-30 | 广州海格通信集团股份有限公司 | Radio multi-party using control device and method |
| CN102904658B (en) * | 2012-09-21 | 2015-02-11 | 广州海格通信集团股份有限公司 | Radio multi-party using control device and method |
| CN109075858A (en) * | 2016-04-27 | 2018-12-21 | 华为技术有限公司 | Method, coordinator and the terminal node of information are transmitted in light wireless communication network |
| US10547383B2 (en) | 2016-04-27 | 2020-01-28 | Huawei Technologies Co., Ltd. | Information transmission method, coordinator, and terminal node in optical wireless communications network |
| CN109075858B (en) * | 2016-04-27 | 2020-08-25 | 华为技术有限公司 | Method, coordinator and terminal node for transmitting information in optical wireless communication network |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070912 Termination date: 20140804 |
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| EXPY | Termination of patent right or utility model |