CN212343771U - Frequency scale signal output function test system of time system terminal - Google Patents
Frequency scale signal output function test system of time system terminal Download PDFInfo
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- CN212343771U CN212343771U CN202021497571.8U CN202021497571U CN212343771U CN 212343771 U CN212343771 U CN 212343771U CN 202021497571 U CN202021497571 U CN 202021497571U CN 212343771 U CN212343771 U CN 212343771U
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Abstract
The utility model relates to the technical field of spaceflight, concretely relates to time system terminal frequency scale signal output function test system, including the antenna, time system terminal, the spectrum analysis appearance, vector network analysis appearance, the frequency scale tester, oscilloscope and power, the antenna is connected with time system terminal, time system terminal is connected with the spectrum analysis appearance respectively through many first signal connecting wires, time system terminal through many second signal connecting wires respectively with the vector network analysis appearance, time system terminal through many third signal connecting wires respectively with the frequency scale tester, time system terminal through many fourth signal connecting wires respectively with the oscilloscope be connected. The utility model discloses can simultaneously carry out frequency standard signal output functional test to a plurality of time system terminals at a frequency standard signal output functional test system, and each time system terminal independent operation each other when carrying out frequency standard signal output functional test, mutual noninterference, convenience and the flexibility of the terminal frequency standard signal output functional test of making the time of improvement.
Description
Technical Field
The utility model relates to a space flight technical field, concretely relates to frequency standard signal output function test system at time system terminal.
Background
The time unifying system is a system for providing a unified standard time signal and a standard frequency signal for the measurement and control system. The space flight measurement and control equipment has many types, large quantity and wide distribution, and if the time length is not unified, the task cannot be completed at all. The system provides accurate time when key event characteristic points such as launching takeoff time (L), ignition and shutdown time of each stage of rocket engine, separation time, data injection time, satellite (ship) and rocket separation time, spacecraft orbit time and the like are required. The continuous, reliable and stable operation of the time unification system is the premise of normal work of the measurement and control system, and the performance of the time unification system directly influences the measurement precision and the measurement system of the aerospace measurement and control system.
The standardized time system equipment consists of a timing frequency calibration unit, a frequency standard unit, a time code generation unit, a time code distinguishing unit, a monitoring computer and the like. The timing frequency correction unit is generally provided with a GPS and a timing frequency correction means of a long-short wave time service system; the frequency standard unit comprises a rubidium atomic frequency standard and a universal quartz frequency standard to form a local redundant frequency standard; the time code generating unit forms a B time code in a standard format through more than 3 redundant modules, and the B time code is distributed and transmitted to nearby user equipment through the time code distinguishing unit; the monitoring microcomputer visually displays the parameters and the states of all the units and reports the running condition of the equipment to the upper-level network management.
Before time system equipment drops into practical application, indispensable need detect the frequency standard signal output function of time system equipment, and among the prior art, it is loaded down with trivial details to the frequency standard signal output function test of time system equipment, and is long consuming time, has the high-efficient production that hinders time system equipment, for this, the utility model provides a simple structure uses the frequency standard signal output function test system at convenient time system terminal.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's is not enough, provides a time system terminal frequency mark signal output function test system, can carry out frequency mark signal output function test to a plurality of time system terminals simultaneously at a frequency mark signal output function test system, and each time system terminal independent operation each other when carrying out frequency mark signal output function test, mutual noninterference, when improving system terminal frequency mark signal output function test's convenience and flexibility.
The purpose of the utility model is realized through the following technical scheme:
a frequency standard signal output function test system of a time system terminal comprises an antenna, the time system terminal, a spectrum analyzer, a vector network analyzer, a frequency standard tester, an oscilloscope and a power supply, wherein the antenna, the time system terminal, the spectrum analyzer, the vector network analyzer, the frequency standard tester and the oscilloscope are respectively connected with the power supply, the antenna is connected with the time system terminal, the time system terminal is respectively connected with the spectrum analyzer through a plurality of first signal connecting wires, the time system terminal is respectively connected with the vector network analyzer through a plurality of second signal connecting wires, the time system terminal is respectively connected with the frequency standard tester through a plurality of third signal connecting wires, and the time system terminal is respectively connected with the oscilloscope through a plurality of fourth signal connecting wires.
Further, the time system terminal has a 10MHz frequency scale signal output function. When the frequency standard signal output function of the time system terminal needs to be tested, the antenna, the time system terminal, the spectrum analyzer, the vector network analyzer, the frequency standard tester and the oscilloscope are respectively connected with a power supply, then the antenna is connected with the time system terminal, the time system terminal is respectively connected with the spectrum analyzer through a plurality of first signal connecting wires, the time system terminal is respectively connected with the vector network analyzer through a plurality of second signal connecting wires, the time system terminal is simultaneously respectively connected with the frequency standard tester through a plurality of third signal connecting wires, and in addition, the time system terminal is respectively connected with the oscilloscope through a plurality of fourth signal connecting wires; then after the time system terminal is started stably, setting the load of the spectrum analyzer to be 50 omega, controlling the time system terminal to respectively transmit 10MHz output signals to the spectrum analyzer through a first signal connecting line, and measuring whether the output power and harmonic suppression of the time system terminal meet the requirements or not; the control time system terminal transmits 10MHz output signals to the vector network analyzer through a plurality of second signal connecting lines respectively, and determines whether the standing-wave ratio of the time system terminal meets the requirements; the control time system terminal respectively transmits 10MHz output signals to the frequency standard tester through a plurality of third signal connecting wires, the frequency standard tester adopts the 10MHz signals output by the hydrogen atom frequency standard as reference, and whether the frequency stability and daily drift rate of the time system terminal meet the requirements or not is measured; the control time system terminal outputs signals to 10MHz of the oscilloscope through a plurality of fourth signal connecting wires respectively, and whether the phase consistency and the output waveform of the measurement time system terminal meet the requirements or not is measured; then disconnecting the antenna from the time system terminal, testing the frequency accuracy of the time system terminal, continuously measuring for 24 hours, and observing whether the time system terminal keeps the accuracy meeting the requirement; and then judging whether the frequency scale signal output function of the time system terminal is qualified or not according to the test result in the step.
Further, the output waveform of the time system terminal is a sine wave. When judging whether the frequency scale signal output function of the time system terminal is qualified, judging according to the following indexes:
(a) outputting a waveform: a sine wave;
(b) output amplitude: 6-8 dBm (50 omega load);
(c) outputting standing-wave ratio: less than or equal to 1.5;
(d) harmonic suppression system: less than or equal to-40 dBc;
(e) phase consistency: less than or equal to 0.5 nsMAX;
(f) taming frequency accuracy (RMS): less than or equal to 1E-12 (after GPS locking, average in 24 hours);
(g) maintaining frequency accuracy: 5E-12 (within 24 hours after satellite signal disconnection);
(h) frequency drift rate: < 3E-12/day;
(i) frequency stability (allen variance):
δ(τ)≤1E-11/20ms；
δ(τ)≤1E-11/s；
δ(τ)≤1E-12/1000s；
δ(τ)≤1E-11/d；
(j) frequency reproduction rate: 2E-11 or less;
(k) temperature characteristics: less than or equal to 3E-11.
Furthermore, the time system terminal is respectively connected with the spectrum analyzer through four first signal connecting lines.
Furthermore, the time system terminal is respectively connected with the vector network analyzer through four second signal connecting lines.
Furthermore, the time system terminal is respectively connected with the oscilloscope through four fourth signal connecting lines.
Further, the oscilloscope is a multi-channel digital oscilloscope.
Furthermore, the frequency scale tester is a multi-channel frequency scale tester.
Further, the frequency scale tester adopts a 10MHz signal output by the hydrogen atom frequency scale as a reference.
Furthermore, a switch is arranged on a connecting line of the antenna and the time system terminal.
Furthermore, the time system terminal, the spectrum analyzer, the vector network analyzer, the frequency scale tester and the oscilloscope form a unit test group, a plurality of unit test groups are arranged in the frequency scale signal output function test system, the time system terminals in the unit test groups are respectively connected with the antenna, and a switch is arranged on a connecting line of the antenna and the time system terminal. The time standard terminal, the spectrum analyzer, the vector network analyzer, the frequency standard tester and the oscilloscope form a unit test group, a plurality of unit test groups are arranged in a frequency standard signal output function test system, a switch is arranged on a connecting line of the antenna and the time standard terminal, and then the frequency standard signal output function test can be simultaneously carried out on a plurality of time standard terminals in the frequency standard signal output function test system, and each time standard terminal runs independently when the frequency standard signal output function test is carried out, and the time standard terminal and the frequency standard terminal do not interfere with each other, so that the convenience and the flexibility of the time standard terminal frequency standard signal output function test are improved.
The utility model has the advantages that: the utility model discloses time system's frequency standard signal output function test system at terminal can carry out frequency standard signal output function test to a plurality of time system terminals simultaneously at a frequency standard signal output function test system, and each time system terminal independent operation each other when carrying out frequency standard signal output function test, mutual noninterference, the convenience and the flexibility of time system terminal frequency standard signal output function test when improving.
Drawings
FIG. 1 is a schematic diagram of module connections of a frequency scale signal output function test system;
FIG. 2 is a schematic diagram of another module connection of the frequency scale signal output function test system;
in the figure, 1, an antenna; 2. a time system terminal; 3. a spectrum analyzer; 4. a vector network analyzer; 5. a frequency scale tester; 6. an oscilloscope; 7. a first signal connection line; 8. a second signal connection line; 9. a third signal connection line; 10. a fourth signal connection line; 11. and (4) switching.
Detailed Description
The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.
As shown in fig. 1 and 2, a system for testing a frequency scale signal output function of a time scale terminal includes an antenna 1, a time scale terminal 2, a spectrum analyzer 3, a vector network analyzer 4, a frequency scale tester 5, an oscilloscope 6, and a power supply, where the antenna 1, the time scale terminal 2, the spectrum analyzer 3, the vector network analyzer 4, the frequency scale tester 5, and the oscilloscope 6 are respectively connected to the power supply, the antenna 1 is connected to the time scale terminal 2, the time scale terminal 2 is respectively connected to the spectrum analyzer 3 through a plurality of first signal connection lines 7, the time scale terminal 2 is respectively connected to the vector network analyzer 4 through a plurality of second signal connection lines 8, the time scale terminal 2 is respectively connected to the frequency scale tester 5 through a plurality of third signal connection lines 9, and the time scale terminal 2 is respectively connected to the oscilloscope 6 through a plurality of fourth signal connection lines 10.
Specifically, the time system terminal 2 has a 10MHz frequency scale signal output function. When the frequency scale signal output function of the time system terminal 2 needs to be tested, the antenna 1, the time system terminal 2, the spectrum analyzer 3, the vector network analyzer 4, the frequency scale tester 5 and the oscilloscope 6 are respectively connected with a power supply, then the antenna 1 is connected with the time system terminal 2, the time system terminal 2 is respectively connected with the spectrum analyzer 3 through a plurality of first signal connecting wires 7, the time system terminal 2 is respectively connected with the vector network analyzer 4 through a plurality of second signal connecting wires 8, the time system terminal 2 is simultaneously respectively connected with the frequency scale tester 5 through a plurality of third signal connecting wires 9, and in addition, the time system terminal 2 is respectively connected with the oscilloscope 6 through a plurality of fourth signal connecting wires 10; then after the time system terminal 2 is started up stably, setting the load of the spectrum analyzer 3 to be 50 omega, controlling the time system terminal 2 to respectively transmit 10MHz output signals to the spectrum analyzer 3 through a first signal connecting line 7, and measuring whether the output power and harmonic suppression of the time system terminal 2 meet the requirements or not; the control time system terminal 2 respectively transmits 10MHz output signals to the vector network analyzer 4 through a plurality of second signal connecting lines 8, and determines whether the standing-wave ratio of the time system terminal 2 meets the requirements; the control time system terminal 2 respectively transmits 10MHz output signals to the frequency standard tester 5 through a plurality of third signal connecting wires 9, the frequency standard tester 5 adopts the 10MHz signals output by the hydrogen atom frequency standard as reference, and whether the frequency stability and the daily drift rate of the measurement time system terminal 2 meet the requirements or not is measured; the control time system terminal 2 transmits 10MHz output signals to the oscilloscope 6 through a plurality of fourth signal connecting lines 10 respectively, and measures whether the phase consistency and the output waveform of the time system terminal 2 meet the requirements or not; then disconnecting the antenna 1 from the time system terminal 2, testing the frequency accuracy of the time system terminal 2, continuously measuring for 24 hours, and observing whether the time system terminal 2 keeps the accuracy to meet the requirement; and then judging whether the frequency scale signal output function of the time system terminal 2 is qualified or not according to the test result in the step.
Specifically, the output waveform of the time system terminal 2 is a sine wave. When judging whether the frequency scale signal output function of the time system terminal 2 is qualified, judging according to the following indexes:
(a) outputting a waveform: a sine wave;
(b) output amplitude: 6-8 dBm (50 omega load);
(c) outputting standing-wave ratio: less than or equal to 1.5;
(d) harmonic suppression system: less than or equal to-40 dBc;
(e) phase consistency: less than or equal to 0.5 nsMAX;
(f) taming frequency accuracy (RMS): less than or equal to 1E-12 (after GPS locking, average in 24 hours);
(g) maintaining frequency accuracy: 5E-12 (within 24 hours after satellite signal disconnection);
(h) frequency drift rate: < 3E-12/day;
(i) frequency stability (allen variance):
δ(τ)≤1E-11/20ms；
δ(τ)≤1E-11/s；
δ(τ)≤1E-12/1000s；
δ(τ)≤1E-11/d；
(j) frequency reproduction rate: 2E-11 or less;
(k) temperature characteristics: less than or equal to 3E-11.
Specifically, the time system terminal 2 is connected to the spectrum analyzer 3 through four first signal connection lines 7.
Specifically, the time system terminal 2 is respectively connected with the vector network analyzer 4 through four second signal connection lines 8.
Specifically, the timing terminal 2 is connected to the oscilloscope 6 through four fourth signal connection lines 10.
Specifically, the oscilloscope 6 is a multi-channel digital oscilloscope.
Specifically, the frequency scale tester 5 is a multi-channel frequency scale tester.
Specifically, the frequency scale tester 5 uses the 10MHz signal output by the hydrogen atom frequency scale as a reference.
Specifically, a switch 11 is disposed on a connection line between the antenna 1 and the timing terminal 2.
Specifically, the timing terminal 2, the spectrum analyzer 3, the vector network analyzer 4, the frequency scale tester 5 and the oscilloscope 6 form a unit test set, a plurality of unit test sets are arranged in the frequency scale signal output function test system, the timing terminal 2 in each unit test set is connected with the antenna 1, and a switch is arranged on a connecting line between the antenna 1 and the timing terminal 2. Through time system terminal 2, spectrum analyzer 3, vector network analyzer 4, frequency scale tester 5 and oscilloscope 6 constitution unit test group, and be provided with a plurality of unit test groups in a frequency scale signal output function test system, set up switch 11 on antenna 1 and time system terminal 2's connecting wire, and then can carry out frequency scale signal output function test to a plurality of time system terminal 2 simultaneously at a frequency scale signal output function test system, and each time system terminal 2 is independent operation each other when carrying out frequency scale signal output function test, mutual noninterference, improve time system terminal 2 frequency scale signal output function test's convenience and flexibility.
When the multi-channel frequency standard testing device is used, when the frequency standard signal output function of the time standard terminal 2 needs to be tested, the antenna 1, the time standard terminal 2, the frequency spectrum analyzer 3, the vector network analyzer 4, the frequency standard tester 5 and the oscilloscope 6 are respectively connected with a power supply, then the antenna 1 is connected with the time standard terminal 2, the time standard terminal 2 is respectively connected with the frequency spectrum analyzer 3 through four first signal connecting wires 7, the time standard terminal 2 is respectively connected with the vector network analyzer 4 through four second signal connecting wires 8, meanwhile, the time standard terminal 2 is respectively connected with the multi-channel frequency standard tester 5 through four third signal connecting wires 9, and in addition, the time standard terminal 2 is respectively connected with the multi-channel oscilloscope 6 through a plurality of fourth signal connecting wires 10; then, the user can use the device to perform the operation,
step S1, after the time system terminal 2 is started stably, setting the load of the spectrum analyzer 3 to be 50 omega, controlling the time system terminal 2 to respectively transmit 10MHz output signals to the spectrum analyzer 3 through the first signal connecting line 7, and measuring whether the output power and harmonic suppression of the time system terminal 2 meet the requirements;
step S2, the timing terminal 2 is controlled to transmit 10MHz output signals to the vector network analyzer 4 through a plurality of second signal connecting lines 8, and whether the standing-wave ratio of the timing terminal 2 meets the requirement is determined;
step S3, the time system terminal 2 is controlled to respectively transmit 10MHz output signals to the multi-channel frequency standard tester 5 through a plurality of third signal connecting lines 9, the multi-channel frequency standard tester 5 adopts the 10MHz signals output by the hydrogen atom frequency standard as reference, and whether the frequency stability and the daily drift rate of the time system terminal 2 meet the requirements or not is measured;
step S4, the timing terminal 2 is controlled to respectively transmit 10MHz output signals to the multi-channel oscilloscope 6 through a plurality of fourth signal connecting lines 10, and the phase consistency and the output waveform of the timing terminal 2 meet the requirements or not are measured;
step S5, then controlling the switch 11 to disconnect the antenna 1 from the time system terminal 2, testing the frequency accuracy of the time system terminal 2, continuously measuring for 24 hours, and observing whether the time system terminal 2 keeps accuracy meeting the requirement;
judging whether the test result in the steps is qualified or not according to the following indexes,
(a) outputting a waveform: a sine wave;
(b) output amplitude: 6-8 dBm (50 omega load);
(c) outputting standing-wave ratio: less than or equal to 1.5;
(d) harmonic suppression system: less than or equal to-40 dBc;
(e) phase consistency: less than or equal to 0.5 nsMAX;
(f) taming frequency accuracy (RMS): less than or equal to 1E-12 (after GPS locking, average in 24 hours);
(g) maintaining frequency accuracy: 5E-12 (within 24 hours after satellite signal disconnection);
(h) frequency drift rate: < 3E-12/day;
(i) frequency stability (allen variance):
δ(τ)≤1E-11/20ms；
δ(τ)≤1E-11/s；
δ(τ)≤1E-12/1000s；
δ(τ)≤1E-11/d；
(j) frequency reproduction rate: 2E-11 or less;
(k) temperature characteristics: less than or equal to 3E-11;
if all the test results in the above steps meet the index requirements, the frequency standard signal output function of the statistical terminal 2 is judged to be qualified, otherwise, the frequency standard signal output function of the statistical terminal 2 is judged to be unqualified.
The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (10)
1. The system is characterized by comprising an antenna, a time system terminal, a spectrum analyzer, a vector network analyzer, a frequency standard tester, an oscilloscope and a power supply, wherein the antenna, the time system terminal, the spectrum analyzer, the vector network analyzer, the frequency standard tester and the oscilloscope are respectively connected with the power supply, the antenna is connected with the time system terminal, the time system terminal is respectively connected with the spectrum analyzer through a plurality of first signal connecting wires, the time system terminal is respectively connected with the vector network analyzer through a plurality of second signal connecting wires, the time system terminal is respectively connected with the frequency standard tester through a plurality of third signal connecting wires, and the time system terminal is respectively connected with the oscilloscope through a plurality of fourth signal connecting wires.
2. The system for testing the frequency scale signal output function of the time system terminal according to claim 1, wherein the time system terminal has a 10MHz frequency scale signal output function.
3. The system for testing the frequency scale signal output function of the time system terminal as claimed in claim 2, wherein the output waveform of the time system terminal is a sine wave.
4. The system for testing the frequency scale signal output function of the time system terminal as claimed in claim 2, wherein the time system terminal is connected to the spectrum analyzer through four first signal connection lines, respectively.
5. The system for testing the frequency scale signal output function of the time system terminal as claimed in claim 2, wherein the time system terminal is connected to the vector network analyzer through four second signal connection lines.
6. The system for testing the frequency scale signal output function of the time system terminal according to claim 2, wherein the time system terminal is connected to the oscilloscope through four fourth signal connection lines respectively.
7. The system for testing the frequency scale signal output function of the time system terminal according to claim 1, wherein the oscilloscope is a multi-channel digital oscilloscope.
8. The system for testing the frequency scale signal output function of the time system terminal as claimed in claim 1, wherein the frequency scale tester is a multi-channel frequency scale tester.
9. The system for testing the frequency scale signal output function of the time system terminal according to claim 8, wherein the frequency scale tester uses the 10MHz signal output by the hydrogen atom frequency scale as a reference.
10. The system for testing the frequency scale signal output function of the time system terminal as claimed in claim 1, wherein a switch is disposed on a connection line between the antenna and the time system terminal.
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| CN202021497571.8U CN212343771U (en) | 2020-07-25 | 2020-07-25 | Frequency scale signal output function test system of time system terminal |
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| CN202021497571.8U CN212343771U (en) | 2020-07-25 | 2020-07-25 | Frequency scale signal output function test system of time system terminal |
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