CN210518333U - Sensitivity testing device for communication receiving system - Google Patents
Sensitivity testing device for communication receiving system Download PDFInfo
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- CN210518333U CN210518333U CN201921925127.9U CN201921925127U CN210518333U CN 210518333 U CN210518333 U CN 210518333U CN 201921925127 U CN201921925127 U CN 201921925127U CN 210518333 U CN210518333 U CN 210518333U
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Abstract
The utility model discloses a communication receiving system sensitivity testing arrangement comprises controller 1, laser instrument 2, modulator 3, beam splitter prism 4, detector 5, oscilloscope 6, error code appearance 7, optical power meter 8. The light splitting prism divides a received laser modulation signal into two parts, one path of optical signal measures an energy value through the optical power meter, the other path of optical signal is received by the detector, the waveform of the received signal is observed on the oscilloscope, the error rate of the received signal is observed on the error code meter, the energy of the transmitting laser is changed through the controller, and when the waveform generated by the oscilloscope is poor and the error rate measured by the error code meter is low, a numerical value displayed by the optical power meter is recorded as a sensitivity value of the detector. The whole testing device has the outstanding characteristics of simple structure, convenience in operation, high measurement precision and the like.
Description
Technical Field
The utility model relates to a communication receiving system sensitivity test device belongs to signal detection technical field.
Background
The sensitivity is one of the key technical indexes of the detector, and the size of the detector is related to factors such as incident light wavelength, incident light energy, incident light signal modulation rate, signal processing mode and the like. Typically, the technical manuals of the sensors give their spectral characteristics and sensitivity characteristics at different incident wavelengths. When a user purchases the detector, different processing modes are adopted for the output signal of the detector, so that the influence of the modulation rate of the incident light signal, the signal processing mode and the like on the sensitivity cannot be given on the manual, and the change of the modulation rate of the incident light signal and the difference of the signal processing modes are key factors influencing the sensitivity of the detector in specific use. From the aspect of testing incident light signal modulation rate, signal processing mode and influencing detector sensitivity, utility model discloses a sensitivity test under different communication rate can be accomplished to communication receiving system sensitivity testing arrangement, also can accomplish the sensitivity test under the different signal processing mode. The whole testing device has the outstanding characteristics of simple structure, convenience in operation, high measurement precision and the like.
SUMMERY OF THE UTILITY MODEL
From the angle of test communication receiving system sensitivity, the utility model provides a communication receiving system sensitivity testing arrangement.
The utility model adopts the following technical scheme:
a sensitivity testing device of a communication receiving system is composed of a controller 1, a laser 2, a modulator 3, a beam splitter prism 4, a detector 5, an oscilloscope 6, an error code meter 7 and an optical power meter 8;
the laser 2 is respectively connected with the controller 1 and the modulator 2 through cables; the beam splitting prism 4 splits the received optical signal into two paths of optical signals, one path of optical signal is sent to the detector 5, and the other path of optical signal is sent to the optical power meter 8; the detector 5 is respectively connected with the oscilloscope 6 and the error code meter 7 through cables.
The specific implementation steps are as follows:
(1) and starting up and powering up to enable all parts of the system to be in a working state.
(2) The controller 1 sends out a control command to control the laser 2 to emit a laser energy output value, and the modulator 3 modulates the periodic square wave signal onto the laser 2.
(3) The beam splitting prism 4 receives the optical signal and divides the optical signal into two paths, one path of the optical signal is sent to the optical power meter 8, the other path of the optical signal is sent to the detector 5, the oscilloscope 6 displays the waveform detected by the detector 5, and the error code meter 7 displays the error rate of the modulation signal.
(4) The controller 1 sends out a control command to change the light energy value output by the laser 2, when the waveform displayed by the oscilloscope 6 is distorted, the controller 1 stops sending out the control command, and at the moment, the value displayed by the optical power 8 is recorded as the detector sensitivity at the current modulation rate.
(5) And (3) changing the speed of the periodic square wave by the modulator, repeating the steps (1) to (4), and measuring the sensitivity of the detector after the speed of the periodic square wave is changed.
(6) And (5) adopting different processing modes for the signals output by the detector 5, repeating the steps (1) to (5), and obtaining the sensitivity of the detector under different processing modes for the signals.
The beneficial effects of the utility model
The device can complete sensitivity tests at different communication rates and can also complete sensitivity tests in different signal processing modes. The whole testing device has the outstanding characteristics of simple structure, convenience in operation, high measurement precision and the like.
Drawings
Fig. 1 is a schematic diagram of the system assembly and structure of the utility model.
Detailed Description
The invention is further described with reference to the following figures and examples:
the laser is OTX-15-155M-MB, the oscilloscope is DPO7104, and the optical power meter is OPHIR.
Example 1
As shown in fig. 1. The device comprises a controller 1, a laser 2, a modulator 3, a beam splitter prism 4, a detector 5, an oscilloscope 6, an error code meter 7 and an optical power meter 8.
The laser 2 is respectively connected with the controller 1 and the modulator 2 through cables; the beam splitting prism 4 splits the received optical signal into two paths of optical signals, one path of optical signal is sent to the detector 5, and the other path of optical signal is sent to the optical power meter 8; the detector 5 is respectively connected with the oscilloscope 6 and the error code meter 7 through cables.
The implementation steps are as follows:
(1) and starting up and powering up to enable all parts of the system to be in a working state.
(2) The controller 1 sends out a control command to control the laser 2 to emit a laser energy output value, and the modulator 3 modulates a periodic square wave signal with the frequency of 6MHz to the laser 2.
(3) The beam splitting prism 4 receives the optical signal and divides the optical signal into two paths, one path of the optical signal is sent to the optical power meter 8, the other path of the optical signal is sent to the detector 5, the oscilloscope 6 displays the waveform detected by the detector 5, and the error code meter 7 displays the error rate of the modulation signal.
(4) The controller 1 sends out a control command to change the light energy value output by the laser 2, when the waveform displayed by the oscilloscope 6 is distorted, the controller 1 stops sending out the control command, and at the moment, the detector sensitivity of the numerical value displayed by the optical power 8 at the 6MHz modulation rate is recorded.
(5) And (3) changing the speed of the periodic square wave to 10MHz by the modulator, repeating the steps (1) to (4), and measuring the sensitivity of the detector with the speed of the periodic square wave to 10 MHz.
(6) And (5) adopting different processing modes for the signals output by the detector 5, repeating the steps (1) to (5), and obtaining the sensitivity of the detector under different processing modes for the signals.
It should be emphasized that the embodiments described herein are illustrative and not restrictive, and thus the present invention includes but is not limited to the embodiments described in the detailed description, as well as other embodiments derived from the technical solutions of the present invention by those skilled in the art, which also belong to the scope of the present invention.
Claims (1)
1. A sensitivity testing device of a communication receiving system is characterized by comprising a controller (1), a laser (2), a modulator (3), a beam splitter prism (4), a detector (5), an oscilloscope (6), an error code meter (7) and an optical power meter (8), wherein the laser (2) is respectively connected with the controller (1) and the modulator (3) through cables; the beam splitting prism (4) splits the received optical signal into two paths of optical signals, one path of optical signal is sent to the detector (5), and the other path of optical signal is sent to the optical power meter (8); the detector (5) is respectively connected with the oscilloscope (6) and the error code meter (7) through cables.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921925127.9U CN210518333U (en) | 2019-11-10 | 2019-11-10 | Sensitivity testing device for communication receiving system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921925127.9U CN210518333U (en) | 2019-11-10 | 2019-11-10 | Sensitivity testing device for communication receiving system |
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| CN210518333U true CN210518333U (en) | 2020-05-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111443342A (en) * | 2020-05-29 | 2020-07-24 | 洛阳敦扬科技发展有限公司 | Testing device capable of rapidly measuring laser receiving sensitivity and testing method thereof |
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2019
- 2019-11-10 CN CN201921925127.9U patent/CN210518333U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111443342A (en) * | 2020-05-29 | 2020-07-24 | 洛阳敦扬科技发展有限公司 | Testing device capable of rapidly measuring laser receiving sensitivity and testing method thereof |
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