CN109039445B - Multi-channel optical modem debugging and testing system and debugging and testing method thereof - Google Patents
Multi-channel optical modem debugging and testing system and debugging and testing method thereof Download PDFInfo
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- CN109039445B CN109039445B CN201810732060.0A CN201810732060A CN109039445B CN 109039445 B CN109039445 B CN 109039445B CN 201810732060 A CN201810732060 A CN 201810732060A CN 109039445 B CN109039445 B CN 109039445B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0083—Testing; Monitoring
Abstract
The invention discloses a multi-channel optical modem debugging and testing system, which comprises: the optical power meter comprises N optical modems to be tested, N-channel optical switches, 1-to-N optical splitters, N + 1-to-2 optical splitters, N wavelength division multiplexers, an optical power meter and an optical attenuator which can respectively provide N optical channels, a clock data recovery instrument, an optical oscilloscope, an error code instrument and an upper computer; the invention also discloses a debugging and testing method of the multi-channel optical modem debugging and testing system, and the method improves the multithreading parallel debugging and testing efficiency and simultaneously improves the equipment integration level to the maximum extent.
Description
Technical Field
The invention relates to the technical field of optical modem debugging and testing, in particular to a multi-channel optical modem debugging and testing system and a debugging and testing method thereof.
Background
In the BOB optical modem product debugging test environment, an error code meter, an optical attenuator, an optical power meter, an optical oscillograph, a clock data recovery instrument, a wavelength division multiplexer, an optical splitter and the like are needed, the production test is carried out by using ATE software to simultaneously control some devices or read test results for reading and writing command parameters of the BOB optical modem product, and if a single-channel mode is adopted for debugging test, only one product can be debugged each time; in the whole debugging and testing process, the error code instrument only exists as a signal generating source, software is not communicated with the error code instrument, the error code instrument can simultaneously divide multiple paths of optical signals to output for multiple tests to share, but only outputs one path of signal in a single-channel debugging and testing environment; in addition, the optical oscillograph is used as the most expensive equipment, and is controlled by software to test the extinction ratio and the eye pattern, but in the whole debugging and testing process, the time for testing by using the optical oscillograph is very short, the optical oscillograph is occupied when the extinction ratio and the eye pattern are tested, and the optical oscillograph is released at other times; so the production efficiency and the equipment utilization rate are not high.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a multi-channel optical modem debugging and testing system and a debugging and testing method thereof, which improve the multithreading parallel debugging and testing efficiency and maximize the equipment integration level.
In order to achieve the purpose, the invention adopts the technical scheme that: a multi-channel optical modem test system comprising:
the optical power meter comprises N optical modems to be tested, N-channel optical switches, 1-to-N optical splitters, N + 1-to-2 optical splitters, N wavelength division multiplexers, an optical power meter and an optical attenuator which can respectively provide N optical channels, a clock data recovery instrument, an optical oscilloscope, an error code instrument and an upper computer;
the output end of the error code instrument is connected with the input end of the 1-in-N optical splitter, N optical channel output ends of the 1-in-N optical splitter are respectively connected with N optical channel input ends of the optical attenuator, N optical channel output ends of the optical attenuator are respectively connected with N input ends of the wavelength division multiplexers, and the common ends of the N wavelength division multiplexers are respectively connected with signal input ends of the N optical modems to be tested;
the signal output ends of the N optical modems to be tested are respectively connected with the common ends of the N wavelength division multiplexers, the output ends of the N wavelength division multiplexers are respectively connected with the common input ports of the N1-in-2 optical splitters, one optical channel output end of the N1-in-2 optical splitters is respectively connected with N optical channel input ends of the optical power meter, the other optical channel output end of the N1-in-2 optical splitters is respectively connected with N optical channel input ends of the N channel optical switch, the output end of the N channel optical switch is connected with the common input end of the last 1-in-2 optical splitter, one of the optical channel output ends of the 1-in-2 optical splitter is connected with the first input end of the optical oscilloscope, the output end of the other optical channel of the 1-in-2 optical splitter is connected with the input end of the clock data recovery instrument, and the RF port of the clock data recovery instrument is connected with the second input end of the optical oscillograph;
the error code meter, the optical power meter, the optical attenuator, the N-channel optical switch, the optical oscillograph and the N light cats to be measured are all in signal connection with the upper computer.
In a preferred embodiment, the optical power meter is a 4-channel optical power meter, and the optical attenuator is a 4-channel optical attenuator.
The invention also discloses a debugging and testing method of the multi-channel optical modem debugging and testing system, which comprises the following steps:
s1, adjusting the power of the transmitting end: reading a test value of an optical power meter of a corresponding channel, comparing the test value with preconfigured specification data, judging whether the test value is within a specification range, if so, entering step S2, if not, performing optical power debugging on a cat to be tested of which the test value is not within the specification range through an upper computer, simultaneously reading the test value of the optical power meter of the corresponding channel in the debugging process, judging whether the optical power is debugged in place, if so, entering step S2, and if not, continuing the debugging or automatically restarting for retesting after the optical power meter is still debugged in place under a set condition;
s2, debugging the originating extinction ratio and the eye pattern;
s3, calibration and calibration test of the light power of the transmitting end: reading the test value of the optical power meter of the corresponding channel, adjusting the calibration coefficient to make the monitoring value consistent with the test value, judging whether the deviation value is in the specification range, if not, restarting the retest, and if so, entering the step S4;
s4, receiving LOS debugging and sensitivity testing: controlling the optical attenuator to control the optical power output at a set position, then adjusting the LOS specification range and testing whether the LOS specification range passes or not, testing the sensitivity under a set condition, and judging whether the LOS specification range passes or not, if not, restarting the retest, and if so, performing the step S5;
s5, receiving end calibration and calibration test: adjusting the calibration coefficient while controlling the power output of the optical attenuator to make the actual optical power of the receiving end consistent with the monitored optical power and judging whether the deviation value is within the specification range, if not, restarting the retest, and if so, entering the step S6;
s6, originating extinction ratio and eye pattern test: the extinction ratio and the eye diagram test are to check the result of the relative extinction ratio and the eye diagram debugging, firstly, whether the optical oscillograph is occupied is judged, if the optical oscillograph is not occupied, the connection with the optical oscillograph is immediately established, the optical switch is set to a corresponding channel, the extinction ratio and the eye diagram are tested, if the optical oscillograph is occupied, the opportunity of establishing the connection is continuously waited, once the connection is established, the optical oscillograph is occupied, the optical switch channel is set for testing, the connection is released after the test is finished, other channels which are not tested for the extinction ratio and the eye diagram continuously occupy the optical oscillograph for testing, and the optical switch is correspondingly set to the same channel by the occupied channel;
and S7, finishing the test and saving the data.
As a preferred embodiment, the method further comprises the following steps:
reading the temperature of the optical modem to be tested before the sending-end optical power is adjusted, judging whether the temperature is within the specification range, if not, stopping the test, meanwhile, automatically restarting and retesting, and if so, entering the step S1.
As another preferred embodiment, the method further comprises the following steps:
VCC and Ibias were tested after extinction ratio and eye pattern testing was completed.
The invention has the beneficial effects that: the invention can simultaneously share one error code instrument and access the optical oscillograph in different time periods through the optical switch when carrying out modulation test on a plurality of optical cats to be tested, and the modulation test of each channel is independently and simultaneously carried out (multi-thread parallel) except the extinction ratio and the eye pattern test, thereby improving the production efficiency and the equipment utilization rate.
Drawings
Fig. 1 is a system block diagram of an 8-channel optical modem debugging test system in an embodiment of the present invention;
fig. 2 is a block flow diagram of an 8-channel optical modem debugging test system in the embodiment of the present invention.
Reference numerals:
1. the device comprises a to-be-measured optical modem, 2 and 8 channel optical switches, 3 and 1-to-8 optical splitters, 4 and 1-to-2 optical splitters, 5 a wavelength division multiplexer, 6 an optical power meter, 7 an optical attenuator, 8 a clock data recovery instrument, 9 an optical oscillograph, 10 an error code instrument, 11 and an upper computer.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Examples
The embodiment takes 8 cats to be measured as an example for explanation; as shown in fig. 1, a multi-channel optical modem testing system includes:
8 optical cats to be measured 1, 8 channel optical switches 2, 1-to-8 optical splitters 3, 8+ 1-to-2 optical splitters 4, 8 wavelength division multiplexers 5, 2 4 channel optical power meters 6, 2 4 channel optical attenuators 7, a clock data recovery instrument 8, an optical oscillograph 9, an error code instrument 10 and an upper computer 11;
the output end of the error code meter 10 is connected with the input end of the 1-to-8 optical splitter 3, 8 optical channel output ends of the 1-to-8 optical splitter 3 are respectively connected with 8 optical channel input ends of the optical attenuator 7, 8 optical channel output ends of the optical attenuator 7 are respectively connected with the input ends of the 8 wavelength division multiplexers 5, and the common ends of the 8 wavelength division multiplexers 5 are respectively connected with the signal input ends of the 8 optical modems 1 to be tested;
the signal output ends of 8 optical modems to be tested 1 are respectively connected with the common end of 8 wavelength division multiplexers 5, the output ends of 8 wavelength division multiplexers 5 are respectively connected with the common input port of 8 1-in-2 optical splitters 4, one optical channel output end of 8 1-in-2 optical splitters 4 is respectively connected with 8 optical channel input ends of an optical power meter 6, the other optical channel output end of 8 1-in-2 optical splitters 4 is respectively connected with 8 optical channel input ends of 8 channel optical switches 2, the output end of 8 channel optical switch 2 is connected with the common input end of the last 1-in-2 optical splitter 4, one optical channel output end of 1-in-2 optical splitter 4 is connected with the first input end of an optical indicator 9, the other optical channel output end of 1-in-2 optical splitter 4 is connected with the input end of the clock data restorer 8, the RF port of the clock data recovery unit 8 is connected to a second input of the optical oscilloscope 9.
The optical signal flow direction of the system during debugging test is specifically as follows:
the optical signal trend of the receiving end of the cat 1 to be measured is as follows: an optical signal emitted by the error code meter 10 is divided into 8 paths of optical signals through the 1-to-8 optical splitter 3, each path of optical signal is connected to each input port of the 2 optical attenuators 7, then is output from the output ports of the optical attenuators 7, and is connected to one end of the wavelength division multiplexer 5WDM, and the receiving end optical signal is input to the optical modem 1 to be measured through the wavelength division multiplexer 5 WDM.
The optical signal trend of the emission end of the cat 1 to be measured is as follows: an optical signal at a transmitting end of a modem 1 to be tested is input through a wavelength division multiplexer 5WDM common end, is output from one end of the wavelength division multiplexer 5WDM and is input into a common end of a 1-to-2 optical splitter 4, passes through two branch ports, one end is output to an optical power meter 6, the other end is connected with one input port of an 8-channel optical switch 2, is output from a common convergence end of the 8-channel optical switch 2 to the common end of the 1-to-2 optical splitter 4, passes through two branch ports, one end is connected to an optical port input end of an optical wave indicator 9, the other end is connected to an optical port input end of a clock data recovery instrument 8, and a clock signal is output through an RF port of the clock data recovery instrument 8 and is connected.
The error code meter 10, the optical attenuator 7, the optical switch, the optical power meter 6 and the optical oscilloscope 9 are connected and communicated with the upper computer 11 through serial port lines (or network cables), and the upper computer 11 is connected with the 8 cats 1 to be tested through network ports.
As shown in fig. 2, the debugging and testing method of the multi-channel optical modem debugging and testing system includes the following steps:
s101, reading the temperature of a cat to be tested, judging whether the temperature is within a specification range, if not, stopping testing, meanwhile, automatically restarting and retesting, and if so, entering the step S102;
s102, transmitting-end optical power debugging: reading a test value of an optical power meter of a corresponding channel, comparing the test value with preconfigured specification data, judging whether the test value is in a specification range, if so, entering step S103, if not, performing optical power debugging on a cat to be tested of which the test value is not in the specification range through an upper computer, simultaneously reading the test value of the optical power meter of the corresponding channel in the debugging process, judging whether the optical power is debugged in place, if so, entering step S103, and if not, continuing the debugging or automatically restarting for retesting after the optical power meter is still debugged in place under a set condition;
s103, debugging the originating extinction ratio and the eye pattern;
s104, calibration and calibration test of the light power of the transmitting end: reading the test value of the optical power meter of the corresponding channel, adjusting the calibration coefficient to make the monitoring value consistent with the test value, judging whether the deviation value is in the specification range, if not, restarting the retest, and if so, entering the step S105;
s105, receiving LOS debugging and sensitivity testing: controlling the optical attenuator to control the optical power output at a set position, then adjusting the LOS specification range and testing whether the LOS specification range passes or not, testing the sensitivity under a set condition, and judging whether the test passes or not, if not, restarting the retest, and if so, performing step S106;
s106, receiving end calibration and calibration test: adjusting the calibration coefficient while controlling the power output of the optical attenuator to make the actual optical power of the receiving end consistent with the monitored optical power and judging whether the deviation value is within the specification range, if not, restarting the retest, and if so, entering the step S107;
s107, the originating extinction ratio and the eye pattern test: the extinction ratio and the eye diagram test are to check the result of the relative extinction ratio and the eye diagram debugging, firstly, whether the optical oscillograph is occupied is judged, if the optical oscillograph is not occupied, the connection with the optical oscillograph is immediately established, the optical switch is set to a corresponding channel, the extinction ratio and the eye diagram are tested, if the optical oscillograph is occupied, the opportunity of establishing the connection is continuously waited, once the connection is established, the optical oscillograph is occupied, the optical switch channel is set for testing, the connection is released after the test is finished, other channels which are not tested for the extinction ratio and the eye diagram continuously occupy the optical oscillograph for testing, and the optical switch is correspondingly set to the same channel by the occupied channel;
s108, testing VCC and Ibias;
and S109, completing the test and saving the data.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (5)
1. A multi-channel optical modem test system, comprising:
the optical power meter comprises N optical modems to be tested, N-channel optical switches, 1-to-N optical splitters, N + 1-to-2 optical splitters, N wavelength division multiplexers, an optical power meter and an optical attenuator which can respectively provide N optical channels, a clock data recovery instrument, an optical oscilloscope, an error code instrument and an upper computer;
the output end of the error code instrument is connected with the input end of the 1-in-N optical splitter, N optical channel output ends of the 1-in-N optical splitter are respectively connected with N optical channel input ends of the optical attenuator, N optical channel output ends of the optical attenuator are respectively connected with N input ends of the wavelength division multiplexers, and the common ends of the N wavelength division multiplexers are respectively connected with signal input ends of the N optical modems to be tested;
the signal output ends of the N optical modems to be tested are respectively connected with the common ends of the N wavelength division multiplexers, the output ends of the N wavelength division multiplexers are respectively connected with the common input ports of the N1-in-2 optical splitters, one optical channel output end of the N1-in-2 optical splitters is respectively connected with N optical channel input ends of the optical power meter, the other optical channel output end of the N1-in-2 optical splitters is respectively connected with N optical channel input ends of the N channel optical switch, the output end of the N channel optical switch is connected with the common input end of the last 1-in-2 optical splitter, one of the optical channel output ends of the 1-in-2 optical splitter is connected with the first input end of the optical oscilloscope, the output end of the other optical channel of the 1-in-2 optical splitter is connected with the input end of the clock data recovery instrument, and the RF port of the clock data recovery instrument is connected with the second input end of the optical oscillograph;
the error code meter, the optical power meter, the optical attenuator, the N-channel optical switch, the optical oscillograph and the N light cats to be measured are all in signal connection with the upper computer.
2. The multi-channel optical modem test system of claim 1, wherein the optical power meter is a 4-channel optical power meter and the optical attenuator is a 4-channel optical attenuator.
3. The method for debugging and testing a multi-channel optical modem debugging and testing system according to any one of claims 1-2, comprising the steps of:
s1, adjusting the power of the transmitting end: reading a test value of an optical power meter of a corresponding channel, comparing the test value with preconfigured specification data, judging whether the test value is within a specification range, if so, entering step S2, if not, performing optical power debugging on a cat to be tested of which the test value is not within the specification range through an upper computer, simultaneously reading the test value of the optical power meter of the corresponding channel in the debugging process, judging whether the optical power is debugged in place, if so, entering step S2, and if not, continuing the debugging or automatically restarting for retesting after the optical power meter is still debugged in place under a set condition;
s2, debugging the originating extinction ratio and the eye pattern;
s3, calibration and calibration test of the light power of the transmitting end: reading the test value of the optical power meter of the corresponding channel, adjusting the calibration coefficient to make the monitoring value consistent with the test value, judging whether the deviation value is in the specification range, if not, restarting the retest, and if so, entering the step S4;
s4, receiving LOS debugging and sensitivity testing: controlling the optical attenuator to control the optical power output at a set position, then adjusting the LOS specification range and testing whether the LOS specification range passes or not, testing the sensitivity under a set condition, and judging whether the LOS specification range passes or not, if not, restarting the retest, and if so, performing the step S5;
s5, receiving end calibration and calibration test: adjusting the calibration coefficient while controlling the power output of the optical attenuator to make the actual optical power of the receiving end consistent with the monitored optical power and judging whether the deviation value is within the specification range, if not, restarting the retest, and if so, entering the step S6;
s6, originating extinction ratio and eye pattern test: firstly, judging whether the optical oscillograph is occupied, if the optical oscillograph is not occupied, immediately establishing connection with the optical oscillograph and setting an optical switch to a corresponding channel, starting to test an extinction ratio and an eye pattern, if the optical oscillograph is occupied, continuously waiting for the opportunity of establishing connection, once the connection is established, occupying the optical oscillograph and setting an optical switch channel for testing, releasing the connection after the testing is finished, continuously preempting the optical oscillograph for testing by other channels which do not test the extinction ratio and the eye pattern, and correspondingly setting the optical switch to the same channel by the preempted channel;
and S7, finishing the test and saving the data.
4. The method for debugging and testing the multi-channel optical modem debugging and testing system according to claim 3, further comprising the steps of:
reading the temperature of the optical modem to be tested before the sending-end optical power is adjusted, judging whether the temperature is within the specification range, if not, stopping the test, meanwhile, automatically restarting and retesting, and if so, entering the step S1.
5. The method for debugging and testing the multi-channel optical modem debugging and testing system according to claim 3, further comprising the steps of:
VCC and Ibias were tested after extinction ratio and eye pattern testing was completed.
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| CN110492928B (en) * | 2019-08-26 | 2021-12-31 | 绍兴中科通信设备有限公司 | BOB calibration test system and control method |
| CN110769334B (en) * | 2019-11-05 | 2022-05-20 | 珠海迈科智能科技股份有限公司 | Combination test method and system for passive optical fiber equipment |
| CN112865863A (en) * | 2020-12-31 | 2021-05-28 | 武汉欣向宜电子技术有限公司 | Multi-channel optical modem debugging and testing system and debugging and testing method thereof |
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