CN101299643A - Indoor unit simulator - Google Patents
Indoor unit simulator Download PDFInfo
- Publication number
- CN101299643A CN101299643A CNA2008100385244A CN200810038524A CN101299643A CN 101299643 A CN101299643 A CN 101299643A CN A2008100385244 A CNA2008100385244 A CN A2008100385244A CN 200810038524 A CN200810038524 A CN 200810038524A CN 101299643 A CN101299643 A CN 101299643A
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- China
- Prior art keywords
- intermediate frequency
- indoor unit
- digital
- outdoor unit
- odu
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- Monitoring And Testing Of Transmission In General (AREA)
Abstract
An indoor unit simulator is provided with a digital to analog converter D/A and a analogue-to-digital converter A/D which are respectively connected with the PC, wherein, the output of the digital to analog converter D/A is connected with an ASK modulator, the output of the ASK modulator is connected to an intermediate frequency transmitting interface TX-IF/an intermediate frequency receiving interface RX-IF, the intermediate frequency transmitting interface TX-IF/the intermediate frequency receiving interface RX-IF are connected to a band filter for receiving signals from the outdoor unit (ODU), and then the output signals of the band filter passes through an amplifying circuit, a detection circuit and a demodulation circuit to send to the analogue-to-digital converter A/D, which is connected with the PC through serial port. The invention possesses the advantages of capability of operating without control of the indoor unit in the outdoor unit single operation mode; light weight, small volume and suitability fro engineering spot use; low cost and simple operation.
Description
Technical field
The present invention relates to a kind ofly lacking under the situation of indoor unit, by PC, the hardware supports that operation provided that mode switch and the power of response outdoor unit is exported belongs to the microwave communication field.
Background technology
Digital microwave communication system is made up of indoor unit (IDU) and outdoor unit (ODU), indoor unit during system works (IDU) is connected by coaxial cable with outdoor unit (ODU), and intermediate frequency transmits (TX-IF), intermediate frequency received signal (RX-IF), telemetered signal (Telemetry), DC power supply (DC) are all transmitted in same coaxial cable.In research and development, production engineering, through regular meeting the situation that indoor unit (IDU) lacks appears, because indoor unit (IDU) is remote with outdoor unit (ODU) on the engineering.In this case, play the effect of response outdoor unit (ODU) control with regard to the substitute that needs a kind of indoor unit (IDU).
Summary of the invention
Technical problem of the present invention is to provide a kind of solution under the situation that lacks indoor unit (IDU), simulate communicating by letter of indoor unit (IDU) and outdoor unit (ODU) by indoor unit (IDU) simulator, come outdoor unit (ODU) is controlled by indoor unit (IDU) simulator with PC.
In order to solve above technical problem, the invention provides a kind of indoor unit (IDU) simulator, a digital to analog converter D/A and a modulus converter A/D (this transducer is to close device) are set, be connected with PC respectively, the output of digital to analog converter D/A is connected with the ASK modulator, the ASK modulator exports intermediate frequency emission interface TX-IF/ intermediate frequency receiving interface RX-IF to, intermediate frequency emission interface TX-IF/ intermediate frequency receiving interface RX-IF is connected with band pass filter, reception is from the signal of outdoor unit (ODU), the signal of band pass filter output is through amplifying circuit, detecting circuit, deliver to modulus converter A/D behind the demodulator circuit, be connected with PC by serial ports.
Described ASK modulator also receives the carrier wave from the 5.5MHz of indoor unit (IDU), the analog signal behind low pass filter, amplifier.
Described intermediate frequency reflector TX-IF, intermediate frequency receiver RX-IF are connected with outdoor unit (ODU) by cable.
The digital signal that the present invention can realize modulus converter A/D simultaneously and digital to analog converter D/A gives indoor unit (IDU) simulator with the PC serial ports is converted to analog signal, simultaneously indoor unit (IDU) simulator is received and demodulation after analog signal carry out numeral and reduce and to deliver to the PC serial ports.The present invention also is provided with the sending and receiving two passes, realizes the proper communication with outdoor unit (ODU).The modulation system that sendaisle of the present invention adopts is that ASK, carrier wave are 5.5MHz, uses radio-frequency (RF) switch that the PC data are modulated and sent; Receive path is, the present invention with the carrier wave that receives be that the ASK debug signal of 10MHz amplifies, demodulation, modulus converter A/D conversion, deliver to PC then, on PC, read the data of reception.
The present invention is as a kind of replacement of indoor unit (IDU), and this indoor unit (IDU) simulator can also write data in the processor (MCU) of outdoor unit (ODU), is the uncap process of write data of outdoor unit (ODU) thereby remove from.
Superior effect of the present invention is:
1) multianalysis: the present invention analyzes and tests the total interface signal of digital microwave communication system, have comprehensive, highly beneficial to the test and the accident analysis of occasions such as research and development, production, engineering;
2) highly substituting: the present invention's use need not outdoor unit (ODU) control and just can operate when indoor unit (IDU) works independently pattern, covered from the instructions for use of multiple occasions such as research and development, production, engineering;
3) portable: the present invention is in light weight, volume is little, is fit to very much the use of engineering site;
4) broad applicability: the test and the accident analysis of multiple occasion such as the present invention can be widely used in researching and developing, production, engineering;
5) cost is low: low cost of manufacture of the present invention is suitable for promoting in multiple occasion such as research and development, production, engineering;
6) easy and simple to handle: the present invention is easy and simple to handle under two kinds of application models, only needs corresponding port electricity consumption cable is linked to each other, and is convenient to research and develop, the use of multiple occasions such as production, engineering.
Description of drawings
Fig. 1 is a theory diagram of the present invention;
The number in the figure explanation
The 1-digital to analog converter; The 2-analog to digital converter;
The 3-PC machine; The 4-ASK modulator;
5-intermediate frequency reflector TX-IF/ intermediate frequency receiver RX-IF interface;
The 6-band pass filter; The 7-amplifying circuit;
The 8-detecting circuit; The 9-demodulator circuit;
The 10-outdoor unit; The 11-carrier wave;
The 12-low pass filter; The 13-amplifier;
The 14-cable; The 15-indoor unit.
Embodiment
See also shown in the accompanying drawing, the invention will be further described.
As shown in Figure 1, the invention provides a kind of indoor unit (IDU) simulator, a digital to analog converter D/A1 and a modulus converter A/D 2 are set, be connected with PC 3 respectively, the output of digital to analog converter D/A1 is connected with ASK modulator 4, ASK modulator 4 exports intermediate frequency emission interface TX-IF/ intermediate frequency receiving interface RX-IF5 to, intermediate frequency emission interface TX-IF/ intermediate frequency receiving interface RX-IF5 is connected with band pass filter 6, reception is from the signal of outdoor unit (ODU), the signal of band pass filter 6 outputs is through amplifying circuit 7, detecting circuit 8, deliver to modulus converter A/D 2 behind the demodulator circuit 9, be connected with PC 3 by serial ports.
Described ASK modulator 4 also receives the carrier wave 11 from the 5.5MHz of indoor unit (IDU) 15, the analog signal behind low pass filter 12, amplifier 13.
Described intermediate frequency reflector TX-IF, intermediate frequency receiver RX-IF5 are connected with outdoor unit (ODU) 10 by cable 14.
The digital signal that the present invention can realize modulus converter A/D 2 simultaneously and digital to analog converter D/A1 gives indoor unit (IDU) simulator with PC 3 serial ports is converted to analog signal, simultaneously indoor unit (IDU) simulator is received and demodulation after analog signal carry out numeral and reduce and to deliver to PC 3 serial ports.The present invention also is provided with the sending and receiving two passes, realizes the proper communication with outdoor unit (ODU) 10.The modulation system that sendaisle of the present invention adopts is that ASK, carrier wave are 5.5MHz, uses radio-frequency (RF) switch that PC 3 data are modulated and sent; Receive path is, the present invention with the carrier wave that receives be that the ASK debug signal of 10MHz amplifies 7, demodulation 9, modulus converter A/D 2 conversions, deliver to PC 3 then, on PC 3, read the data of reception.
When work, only need the present invention is connected to outdoor unit (ODU) 10 by signal multiplexer (Bias Tee), by PC 3 serial ports outdoor unit (ODU) 10 is carried out feedback response, concrete operations are as follows:
The serial ports of serial ports of the present invention with PC 3 is connected, provide-direct current of 48V, telemetered signal of the present invention (Telemetry) port is connected with telemetered signal (Telemetry) port of signal multiplexer (Bias Tee), simultaneously, the compound end of signal multiplexer (Bias Tee) is connected with outdoor unit (ODU) 10, and IMU is crossed the PC serial ports and is cooperated corresponding software that outdoor unit (ODU) 10 has been controlled.
Claims (3)
1, a kind of indoor unit simulator is characterized in that:
A digital to analog converter D/A and a modulus converter A/D are set, be connected with PC respectively, the output of digital to analog converter D/A is connected with the ASK modulator, the ASK modulator exports intermediate frequency emission interface TX-IF/ intermediate frequency receiving interface RX-IF to, intermediate frequency emission interface TX-IF/ intermediate frequency receiving interface RX-IF is connected with band pass filter, reception is from the signal of outdoor unit (ODU), the signal of band pass filter output is delivered to modulus converter A/D behind amplifying circuit, detecting circuit, demodulator circuit, be connected with PC by serial ports.
2, by the described indoor unit simulator of claim 1, it is characterized in that:
Described ASK modulator also receives the carrier wave from the 5.5MHz of indoor unit (IDU), the analog signal behind low pass filter, amplifier.
3, by the described indoor unit simulator of claim 1, it is characterized in that:
Described intermediate frequency reflector TX-IF, intermediate frequency receiver RX-IF are connected with outdoor unit (ODU) by cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100385244A CN101299643A (en) | 2008-06-04 | 2008-06-04 | Indoor unit simulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100385244A CN101299643A (en) | 2008-06-04 | 2008-06-04 | Indoor unit simulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101299643A true CN101299643A (en) | 2008-11-05 |
Family
ID=40079345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100385244A Pending CN101299643A (en) | 2008-06-04 | 2008-06-04 | Indoor unit simulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101299643A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011072582A1 (en) * | 2009-12-17 | 2011-06-23 | 华为技术有限公司 | Method, device and system for controlling and testing outdoor unit |
-
2008
- 2008-06-04 CN CNA2008100385244A patent/CN101299643A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011072582A1 (en) * | 2009-12-17 | 2011-06-23 | 华为技术有限公司 | Method, device and system for controlling and testing outdoor unit |
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| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20081105 |
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| C20 | Patent right or utility model deemed to be abandoned or is abandoned |