CN106990417B - A kind of satellite repeater test macro calibration method - Google Patents
A kind of satellite repeater test macro calibration method Download PDFInfo
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- CN106990417B CN106990417B CN201710133708.8A CN201710133708A CN106990417B CN 106990417 B CN106990417 B CN 106990417B CN 201710133708 A CN201710133708 A CN 201710133708A CN 106990417 B CN106990417 B CN 106990417B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
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- G01S19/23—Testing, monitoring, correcting or calibrating of receiver elements
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Abstract
A kind of satellite repeater test macro calibration method, step are as follows: (1) full frequency band phase reference is established to the receiver of vector network analyzer；(2) as unit of the frequency range that satellite to be measured repeater package contains, the leading portion link of satellite repeater test macro is calibrated；(3) calibration of back segment uplink is carried out as unit of the uplink beam that satellite to be measured repeater package contains；(4) calibration of back segment downlink is carried out as unit of the downlink wave beam that satellite to be measured repeater package contains；(5) step (2)~step (4) result is combined into complete satellite-ground link calibration data.The method of the present invention binding test system theory of constitution and satellite repeater framework, take full advantage of the transceiver frequency simultaneous tuning characteristic and scan calibration function of vector network analyzer, multiple Measurement channel parallel synchronous completion frequency sweep calibrations are established, the calibration efficiency calibrated before communication satellite coverage test, calibration accuracy can be significantly improved, calibrate and implement convenience and calibration the degree of automation.
Description
Technical field
The invention belongs to the communications fields, are related to a kind of calibration program of satellite repeater test macro, especially suitable for star
Upper wave beam and number of vias are more, the combination that interlinks is complicated and the biggish extensive transponder of bandwidth chahnel, can guarantee high school
Under the premise of quasi- precision, the calibration efficiency of system is substantially improved, to accelerate test and the development progress of whole star.
Background technique
Continuous improvement with the continuous development and user of telecommunication satellite platform to traffic capacity demands, telecommunication satellite
Antenna beam in payload is more and more, and transponder number is also more and more, and the bandwidth of forwarding channel is increasing, different
Interlinkage between wave beam also becomes increasingly complex, and radio frequency testing task amount dramatically increases, and load test efficiency has become telecommunication satellite
Bottleneck in development process.Wherein, it before satellite repeater test, needs to be tested the input of transponder, delivery outlet face is
The plane of reference calibrates ground testing system, therefore collimation technique is one of the key technology in transponder test.Especially
For the test of extensive communications transponder, system calibration occupies great specific gravity during each stage electrical measurement of whole star,
Calibration accuracy also directly affects the measuring accuracy of whole star.
Currently, communication satellite coverage test macro is by signal source, frequency spectrograph, power meter, switch matrix and test cable
Composition, system calibration scheme are to carry out respectively using transponder channel on star as basic unit for uplink and downlink difference test link
Calibration.The calibrating principle of uplink is as shown in Figure 1.Signal source exports the radiofrequency signal of uplink frequency point, via on switch matrix
Row access and rear end upper planet ground test cable, reach power sensor B, while power sensor A is via the coupling of coupler 2
Mouth monitors that the reading difference of rate of citing sb. for meritorious service sensors A and power sensor B are the uplink of the frequency point to signal source output power
Calibration data.Down link calibration functional block diagram is as shown in Figure 2.Signal source exports the radiofrequency signal of downlink frequency point, via switch
Coupler 2 and SW1 in matrix with entering lower planet test cable and switch matrix downlink, reach frequency spectrograph (coupling aperture)
And power sensor B (straightthrough port), then switching SW1 makes radiofrequency signal ingoing power sensors A, rate of citing sb. for meritorious service sensors A and function
The reading difference of rate sensor B is the descending power meter branch calibration data of the frequency point, the reading of rate of citing sb. for meritorious service sensors A and frequency spectrograph
Number difference is the downlink frequency spectrometer branch calibration data of the frequency point.
In order to improve the efficiency of test, there is the transponder test macro based on vector network analyzer, mainly by
Stub cable and two stars ground test cable composition, system group between one vector network analyzer, a switch matrix, two instruments
It is as shown in Figure 5 at block diagram.For this test macro, existing calibration program has limitation or has been not suitable for, major embodiment
:
(1) existing calibration process needs to complete jointly using signal source with frequency spectrograph, and does not have this in Fig. 5 test macro
Different test equipment, and the switch matrix in test macro has also done adaptation on the basis of existing and (has increased and swear
Measure the interface of Network Analyzer), test link is varied with calibration link.If specially adding signal in the test macro
The equipment such as source, frequency spectrograph are used for system calibration, then testing cost can be substantially improved, and system complexity will also be significantly increased, and
Increase connection mismatch risk when equipment also results in calibration to increase, the non-ideal frequency response of instrument itself can also make test result can
Reliability reduces；
(2) existing calibration method is carried out as unit of transponder channel according to uplink and downlink difference link respectively, and every
In each channel of a link, and need to be in a manner of fixed frequency stepping, frequency point measurement link Insertion Loss (i.e. calibration data) one by one.
Therefore, for uplink and downlink link is more, channel is more, broader bandwidth, the extensive transponder of the lesser multichannel of frequency stepping are calibrated
When, system calibration procedure will be extremely cumbersome, and efficiency is extremely low, or even will affect the development progress of whole star.
Summary of the invention
Technical problem solved by the present invention is having overcome the deficiencies of the prior art and provide a kind of new satellite repeater survey
Test macro has been divided into leading portion chain by the calibration method of test system, binding test system theory of constitution and satellite repeater framework
Road (stub cable 1,2 between arrow net and instrument) and back segment link (switch matrix and upper and lower planet test cable) two parts are distinguished
Calibration is completed, and every section is calibrated the transceiver frequency simultaneous tuning characteristic for all taking full advantage of vector network analyzer and scanning school
Quasi- function, while establishing multiple Measurement channel parallel synchronous and completing frequency sweep calibration, communication satellite coverage survey can be significantly improved
Calibration efficiency, calibration accuracy, calibration implementation convenience and the calibration the degree of automation calibrated before examination.
The technical solution of the invention is as follows: a kind of satellite repeater test macro calibration method includes the following steps:
(1) full frequency band phase reference is established to the receiver of vector network analyzer；
(2) as unit of the frequency range that satellite to be measured repeater package contains, to the leading portion link of satellite repeater test macro into
Row calibration；The leading portion link includes the company of vector network analyzer itself and vector network analyzer and switch matrix
Wiring cable；
(3) calibration of back segment uplink is carried out as unit of the uplink beam that satellite to be measured repeater package contains；Described
Back segment uplink includes that uplink inside switch matrix and switch matrix are connect with the uplink of satellite to be measured transponder
Cable；
(4) calibration of back segment downlink is carried out as unit of the downlink wave beam that satellite to be measured repeater package contains；Described
Back segment downlink includes that downlink inside switch matrix and switch matrix are connect with the downlink of satellite to be measured transponder
Cable；
(5) step (2)~step (4) result is combined into complete satellite-ground link calibration data.
The method of full frequency band phase reference is established in the step (1) are as follows:
(201) USB port of phase reference part is connected to the USB port of vector network analyzer, by the feed of phase reference part
Mouth is connected to power supply, and the input port of phase reference part is connected to the when base reference port of vector network analyzer；By electronics
Calibration component is connected to the USB port of vector network analyzer；By the GPIB (0) of the GPIB mouth of power meter and vector network analyzer
Controller mouthfuls are connected；The vector network analyzer is PNA-X series；
(202) reset vector Network Analyzer establishes Measurement channel, setting initial frequency and termination frequency, vector network
Phase reference part that analyzer automatic identification is connected, Electronic Calibration part；
(203) output port of phase reference part is connected with the port PORT2 of vector network analyzer, simultaneously will
Top 90 degree of two row of horizontal wire jumpers overturnings are automatic using vector network analyzer later to plumbness on the right side of the port PORT2
Measuring and calculating；
(204) port PORTA of Electronic Calibration part is connected with the port PORT1 of vector network analyzer, while PORT2
Top two rows of wire jumpers still keep plumbness on the right side of port, utilize vector network analyzer automatic measurement & calculation later；
(205) port PORTA of Electronic Calibration part is connected with the port PORT2 of vector network analyzer, while PORT2
Top two rows of wire jumpers still keep plumbness on the right side of port, utilize vector network analyzer automatic measurement & calculation later；
(206) port PORT1 of vector network analyzer is connected with the port PORT2, while top on the right side of the port PORT2
Two row of horizontal wire jumpers still keep plumbness, later utilize vector network analyzer automatic measurement & calculation；
(207) power sensor is connected to the port PORT1 of vector network analyzer, while will be on the right side of the port PORT2
Top two rows of wire jumpers restore to horizontality, utilize vector network analyzer automatic measurement & calculation later；
(208) port PORTA of Electronic Calibration part is connected with the port PORT1 of vector network analyzer, while PORT2
Top two rows of wire jumpers still keep horizontality on the right side of port, utilize vector network analyzer automatic measurement & calculation later；
(209) port PORTA of Electronic Calibration part is connected with the port PORT2 of vector network analyzer, while PORT2
Top two rows of wire jumpers still keep horizontality on the right side of port, utilize vector network analyzer automatic measurement & calculation later；
(210) port PORT1 of vector network analyzer is connected with the port PORT2, while top on the right side of the port PORT2
Two row of horizontal wire jumpers still keep horizontality, later utilize vector network analyzer automatic measurement & calculation.
To the calibration method of leading portion link in the step (2) are as follows:
(301) Electronic Calibration part is connected to the USB port of vector network analyzer, by the GPIB mouth and vector network of power meter
Controller mouthfuls of GPIB (0) of analyzer are connected；
(302) reset vector Network Analyzer, newly-built two Measurement channels, one of Measurement channel <
Measurement Class>be selected as<Scalar Mixer/Converters+Phase>, setting scanning mode are Linear
Frequency, setting intermediate-frequency bandwidth, number of scan points, calibration frequency range and calibration level；Another Measurement channel <
Measurement Class>be selected as<Swept IMD Converters>, setting scanning mode are Swept fc, and setting is double
Wave frequency is poor, dominant frequency signal receives intermediate-frequency bandwidth, inter-modulated signal receives intermediate-frequency bandwidth, calibration frequency range；
(303) error threshold of the calibration of power, and the full frequency band phase reference having built up in invocation step (1) are set；
(304) power sensor is connected with the port PORT1 of vector network analyzer, vector network analyzer automatically into
The calibration of row source power and the calibration of PORT1 port reference receiver power；
(305) port PORTA of Electronic Calibration part is connected with the port PORT1 of vector network analyzer, by electronics school
The port PORTB of quasi- part is connected with the port PORT2 of vector network analyzer, and vector network analyzer carries out Two-port netwerk SC automatically
Parametric calibration and the response calibration of PORT2 end receiver.
The method of back segment uplink calibration is carried out in the step (3) are as follows:
(401) Measurement channel is established, setting calibration initial frequency terminates frequency and calibration level；
(402) port PORT1 of vector network analyzer is passed through into the PORTA of stub cable 1 and Electronic Calibration part between instrument
Port is connected, and the port PORT2 of vector network analyzer is passed through the port PORTB of stub cable 2 and Electronic Calibration part between instrument
It is connected, opens the radio frequency output of vector network analyzer, carries out the S parameter calibration of vector network analyzer；
(403) port PORT1 of vector network analyzer is passed through into stub cable 1 between instrument and A mouthfuls of arrow net of switch matrix
Connection, by the upper planet connected on switch matrix rear panel the another port of test cable passes through stub cable 2 between instrument and arrow
The port PORT2 for measuring Network Analyzer is connected, and measurement parameter is selected as S21, opens the radio frequency output of vector network analyzer, measurement
The uplink tests the link Insertion Loss and chain-circuit time delay at wave beam different frequent points.
The method of back segment down link calibration is carried out in the step (4) are as follows:
(501) Measurement channel is established, setting calibration initial frequency terminates frequency and calibration level；
(502) port PORT1 of vector network analyzer is passed through into the PORTA of stub cable 1 and Electronic Calibration part between instrument
Port is connected, and the port PORT2 of vector network analyzer is passed through the port PORTB of stub cable 2 and Electronic Calibration part between instrument
It is connected, opens the radio frequency output of vector network analyzer, carries out the S parameter calibration of vector network analyzer；
(503) port PORT2 of vector network analyzer is passed through into stub cable 1 between instrument and B mouthfuls of arrow net of switch matrix
Connection, by the upper planet connected on switch matrix the another port of test cable passes through stub cable 2 and vector network between instrument
The port PORT1 of analyzer is connected, and the corresponding switch matrix internal path of the uplink beam is cut through, and arrow net measurement parameter is selected as
S21 opens the radio frequency output of vector network analyzer, measures link Insertion Loss and link at downlink test wave beam different frequent points
Time delay.
The advantages of the present invention over the prior art are that:
(1) present invention takes full advantage of the hardware synchronization characteristic of test macro core equipment vector network analyzer, calibration
Process is completed by arrow net built-in algorithm, therefore calibration method the degree of automation of the present invention is higher, and system robustness is stronger, and calibration is real
It is higher to apply convenience, artificial participation is lower, this may make the reliability of calibration process higher, and error rate is lower；
(2) present invention adds the segment link calibration program of back segment chain calibration using leading portion chain calibration, in same frequency range
Transponder (such as all Ku band transponders or all C band transponders) only needs to carry out a leading portion chain calibration, same
Wave beam (i.e. one complete physical testing link) interior transponder only need carry out a back segment chain calibration, this compared with it is existing with
Transponder channel is the calibration program of basic unit, and calibration item is less.In addition, the present invention utilizes arrow net scan calibration function,
Compared with existing by frequency point calibration program, efficiency is substantially improved.For example, one logical with 10 interlinkage wave beams (under 5 on 5) and 10
The C band transponder in road, the calibration item that existing calibration program needs are 10 × 10=100, need complete within about 2000 minutes,
And calibration program of the invention only needs 1 (1 leading portion chain calibration)+5 × 2=11 calibration item, need about 200 minutes it is complete
At efficiency improves 10 times；
(3) present invention uses calibration of power technology, has modified the non-ideal Frequency Response of test equipment itself, and by arrow
Net dual-port SC parametric calibration, it is multinomial to test macro port mismatch error, directional error, frequency response error, lobe error etc.
Error is corrected, and than only doing calibration to link Insertion Loss in existing scheme, is had and is more fully calibrated spreadability and higher school
Quasi- precision.In addition, the present invention has carried out accurate calibration and De- embedding, therefore group delay, width to the phase-frequency characteristic of test macro
Phase distribution character equiphase class testing result true and accurate more than traditional scheme；
(4) present invention design multi-channel parallel calibration program synchronously completes the test such as power class, frequency response class, non-linear class
Calibration before the survey of project further decreases calibration and implements complexity, promotes calibration efficiency.
Detailed description of the invention
Fig. 1 is existing calibration program uplink calibrating principle block diagram；
Fig. 2 is existing calibration program down link calibration functional block diagram；
Fig. 3 is system leading portion chain calibration functional block diagram in the present invention；
Fig. 4 is system back segment chain calibration functional block diagram in the present invention；
Fig. 5 is test principle block diagram in the present invention；
Fig. 6 is the internal structure block diagram of test macro switch matrix in the present invention.
Specific embodiment
Test system hardware in the present invention is by short between a vector network analyzer, a switch matrix, two instruments
Cable and two stars ground test cable composition.Also need additionally to use when calibration power meter (comprising a power sensor),
One phase reference part (comb signal generator) and an Electronic Calibration part.
Vector network analyzer is the PNA-X series of Keysight company, and need to have Scalar Mixer/
Converters+Phase measurement pattern, Swept IMD Converters measurement pattern and 083,087 option, and
Firmware version number need to be A09.80.03 or higher.In addition, also needing successively to use phase reference part in calibration process
U9391F (the comb signal generator of 50GHz), power meter N1914 (having power sensor E4413A), Electronic Calibration part
N4692A is established with being respectively completed vector network analyzer phase reference, source power is calibrated and dual-port SC parametric calibration.
It is illustrated in figure 6 in test macro principle and each port-mark inside switch matrix, is in traditional test with opening
It is individually designed and increase uplink and downlink vector network analyzer test access (thickened portion in Fig. 6) on the basis of closing matrix.?
That is the RF switch (SW1 in Fig. 6) of the increase of uplink vector network analyzer test access one and half steel cables and an alternative,
It is connected into the existing wave beam branch switch in rear end (SW2 in Fig. 6).Newly-increased vector network analyzer uplink test access is evaded
Many radio frequency passive devices such as combiner, coupler in traditional scheme switch matrix so that test link is simpler, Insertion Loss more
It is small, and also avoid that the risk that matches criteria loads and leads to microwave radiation and link mismatch is not installed.Uplink vector network
The input port of analyzer test access be it is newly-increased, port-mark is " arrow net A mouthful ", output port be it is original, port-mark is
" satellite uplink 1, satellite uplink 2, satellite uplink 3 ..., satellite uplink 6 ... ".Downlink vector network analyzer test access is only
An optional branch has been increased newly in one RF switch of multiselect (SW4 in Fig. 6) of rear class, remaining is constant.Downlink vector network
The input port of analyzer test access be it is original, port-mark be " satellite downlink 1, satellite downlink 2, satellite downlink 3 ..., defend
Star downlink 6 ... ", increase an output port newly, port-mark is " B mouthfuls of arrow net ".
Steps are as follows for realization of the invention:
1, arrow net receiver phase benchmark is established
Since satellite repeater is frequency conversion system, the transmitting-receiving end signal alien frequencies of vector network analyzer, and swear that net connects
Phase reference of the receipts machine at different frequent points is inconsistent.And group delay characteristic, width phase distribution character of satellite repeater etc. is tested
Project needs stringent measurement frequency conversion phase, therefore it is required that the measuring receiver of vector network analyzer has unification in each frequency point
Phase reference.So need to initially set up arrow net receiver broadband before carrying out test macro calibration and unify phase reference.Note that
Unified phase reference establishment process before test every time without being carried out.If test existing phase reference file in arrow net
(calset file), and frequency range can also cover transponder to be measured, then following processes without carrying out, directly execute step 2
?.
The present invention, as phase reference part, is received using the comb signal generator U9391F of Keysight company for arrow net
Machine provides the phase relativeness between different frequency.
System connection is carried out first:
(1) USB port of phase reference part U9391F is connected to the USB port of arrow net；The feed mouth of U9391F is passed through into feed
Line is connected to any one 12V pressure stabilizing out-put supply；U9391F input port is connected to the 10MHz REF of arrow net rear panel
Base reference port when OUT, arrow net provide work clock to U9391F；
(2) Electronic Calibration part N4692A is connected to arrow net USB port by USB connecting line；
(3) by the GPIB (0) of the GPIB mouth of power meter N1914 (being connected with power sensor E4413A) and arrow net rear panel
Controller mouthfuls are connected, to complete power collecting and calibration using arrow net come elastic calibration device.
Then parameter setting is carried out:
(1) it resets (Preset) and swears net, establish Measurement channel,<Measurement Class>is selected as<Scalar
Mixer/Converters+Phase>, it is arranged in<Cal → Phase Reference Wizard>, only frequency is (general to rise
Beginning set of frequency is 55MHz, terminates frequency and is arranged according to the minimum value in calibration instrument maximum operating frequency, i.e., so that system
The frequency coverage of one phase reference is as wide as possible, to adapt to the demand of different model)；
(2) sequence number of the connected phase reference part of arrow net automatic identification, Electronic Calibration part and power sensor.
Finally carry out phase reference foundation:
(1) output port of phase reference part U9391F is connected with the PORT2 of arrow net, while will be top on the right side of PORT2
90 degree of two row of horizontal wire jumpers overturnings to plumbness, click<measure>later, arrow net carries out automatic measurement & calculation；
(2) PORTA of Electronic Calibration part N4692A is connected with the PORT1 of arrow net, while two rows top on the right side of PORT2
Wire jumper still keeps plumbness, clicks<measure>later, and arrow net carries out automatic measurement & calculation；
(3) PORTA of Electronic Calibration part N4692A is connected with arrow net PORT2, while two rows of jumps top on the right side of PORT2
Line still keeps plumbness, clicks<measure>later, and arrow net carries out automatic measurement & calculation；
(4) PORT1 of arrow net is connected with PORT2 using fixed ampllitude steady phase stub cable, while two rows top on the right side of PORT2
Horizontal wire jumper still keeps plumbness, clicks<measure>later, and arrow net carries out automatic measurement & calculation；
(5) power sensor E4413A is connected to arrow net PORT1, while two rows of wire jumpers top on the right side of PORT2 are extensive
Again to horizontality,<measure>is clicked later, arrow net carries out automatic measurement & calculation；
(6) PORTA of Electronic Calibration part N4692A is connected with the PORT1 of arrow net, while two rows top on the right side of PORT2
Wire jumper still keeps horizontality, clicks<measure>later, and arrow net carries out automatic measurement & calculation；
(7) PORTA of Electronic Calibration part N4692A is connected with arrow net PORT2, while two rows of jumps top on the right side of PORT2
Line still keeps horizontality, clicks<measure>later, and arrow net carries out automatic measurement & calculation；
(8) PORT1 of arrow net is connected with PORT2 using fixed ampllitude steady phase stub cable, while two rows top on the right side of PORT2
Horizontal wire jumper still keeps horizontality, clicks<measure>later, and arrow net carries out automatic measurement & calculation.
Vector network analyzer has built-in phase reference to establish algorithm, and tester need to only carry out arrow network parameters setting,
And it is separately connected phase reference part, Electronic Calibration part, power meter and power sensor by above-mentioned steps, swear the phase of net receiver
Measuring and calculating and phase reference establishment process are netted internal automatic control by arrow completely and are completed.
So far, swear that the broadband of net receiver is unified phase reference foundation and finished, by the current arrow with unified phase reference
Net measurement environment is stored as calset file, in case calling when subsequent leading portion chain calibration.
2, leading portion chain calibration
The method of the present invention devises the system calibration scheme that leading portion chain calibration and back segment chain calibration combine.Wherein,
Leading portion chain calibration belongs to the self calibration of arrow net system, is only calibrated to the connecting pin of arrow net dual-port stub cable and switch matrix
Face.To switch matrix and rear end star test cable does the measurement of Insertion Loss and time delay to back segment chain calibration.When transponder is tested, after
Section link calibration data is embedded into leading portion chain calibration environment, is combined into the calibration data of complete test link.Leading portion link
Calibration executes sequence with not stringent successive of back segment chain calibration, under normal circumstances first progress leading portion chain calibration, then carries out
Back segment chain calibration.
Leading portion chain calibration is carried out as unit of frequency range, i.e., same frequency range only needs to carry out a leading portion chain calibration, different
Frequency range need to carry out multiple leading portion chain calibration respectively.For example, repeater package to be measured contains 20 road C band transponders, 15 road Ku frequency ranges
Transponder and 10 road Ka band transponders, then needing 3 leading portion chain calibrations of progress, (C frequency range is primary, Ku frequency range is primary, Ka frequency
Duan Yici).Below by taking a band transponder as an example, leading portion chain calibration process is described in detail.If transponder to be measured has n frequency
Section only need to sequentially repeat n times following step.
When leading portion chain calibration, keep the connection status of Electronic Calibration part N4692A and power meter N1914 in step 1 constant
(being connected respectively by USB port and GPIB mouthfuls with arrow net), parameter setting is carried out later:
(1) it resets (Preset) and swears net, create 2 channel (calibration of binary channels parallel synchronous), wherein channel1
<Measurement Class>is selected as<Scalar Mixer/Converters+Phase>, channel2<
Measurement Class>be selected as<Swept IMD Converters>；
(2) channel1 is chosen, in<Mixer Setup → Sweep>, setting scanning mode (Sweep Type) is frequency
Rate scanning mode (Linear Frequency) is arranged intermediate-frequency bandwidth (IF Bandwidth) (being traditionally arranged to be 1KHz), setting
Number of scan points (Number of Points) (being calculated according to calibration bandwidth as defined in technological document and frequency stepping)；<
Mixer Setup → Mixer Frequency > in, according to parameter on star and measuring technology documentation requirements, calibration frequency model is set
It encloses, notices that the frequency range need to cover all frequency points of the transponder to be measured in the frequency range (for example, transponder to be measured includes 20 altogether
Road C band transponder, then calibration frequency range need to cover all frequency points of this 20 paths)；< Mixer Setup →
Power > middle setting calibration level, is generally set to 0dBm；
(3) channel2 is chosen, in<Swept IMDX Setup → Tone Frequency>, scanning mode is set
(Sweep Type) is center frequency sweep mode (Swept fc), is arranged double wave frequency difference (Fixed DeltaF), is generally set to
2MHz, setting dominant frequency signal receives intermediate-frequency bandwidth (Main Tone IFBW) and inter-modulated signal receives intermediate-frequency bandwidth (IM Tone
IFBW), generally it is set to 100KHz and 1KHz；School is set in<Swept IMDX Setup → Mixer Frequency>
Quasi- frequency range (frequency range need to be consistent with the setting in channel1)；
(4)<Cal → Start Cal → Cal All Channel>is selected, carries out the calibration of binary channels parallel synchronous, will<
Phase Correction Method>be selected as<Use Receiver Characterization Calset>, and call step
The calset file stored in rapid 1.The error threshold (Accuracy Tolerance) of the calibration of power is finally set, generally
It is set as 0.02dBm.
After parameter setting is completed, starting to carry out the implementation of leading portion chain calibration, leading portion chain calibration process is divided into two steps,
Connection principle block diagram is as shown in Figure 3.Specific step is as follows:
(1) power sensor is connected using stub cable 1 between instrument with arrow net PORT1, clicks<measure>later, arrow
The internal automatic progress source power calibration of net and the PORT1 reference receiver calibration of power；
(2) Electronic Calibration part PORTA is connected using stub cable 1 between instrument with the PORT1 of arrow net, utilizes electricity short between instrument
Electronic Calibration part PORTB is connected by cable 2 with arrow net PORT2, click<measure>later, the internal automatic progress Two-port netwerk of arrow net
SC parametric calibration and the response calibration of PORT2 receiver are clicked<finish>until occurring terminating interface.
Vector network analyzer has built-in calibration algorithm, and tester need to only carry out arrow network parameters setting, and by above-mentioned
Step is separately connected Electronic Calibration part, power meter and power sensor, and the calibration of power and SC parametric calibration process are completely by arrow net
Internal automatic control is completed.
So far, leading portion chain calibration is finished, and the calibration result of current frequency range is finally stored as .csa in arrow net
File, in case being called when follow-up test.
3, back segment chain calibration
Back segment chain calibration functional block diagram is as shown in figure 4, be divided into uplink calibration and down link calibration.Calibration is with wave
Beam is unit progress, i.e., same wave beam only needs to carry out a back segment chain calibration, and different beams need to carry out multiple back segment chain respectively
Road calibration.For example, repeater package to be measured contains 5 uplink beams and 5 downlink wave beams, then need to carry out 10 back segment chain calibrations (5
Secondary uplink, 5 downlinks).Below by taking 1 uplink beam and 1 downlink wave beam as an example, uplink calibration process and downlink are described in detail
Chain calibration process.If transponder to be measured has n uplink beam and m downlink wave beam, only need to sequentially repeat in n times
Line link calibration steps and m down link calibration step, n and m are positive integer.
(1) uplink is calibrated
Initially set up Measurement channel.<Measurement Class>is selected as<Standard>.In<Freq>, according to
Parameter and the setting of measuring technology documentation requirements calibrate, stop frequency on star, notice that the frequency range need at least cover the upgoing wave
All channel frequences in beam.Calibration level is set in<Power>, is generally set to 0dBm.
Then arrow net S parameter self calibration is carried out.One end of stub cable 1 between instrument is connected with the PORT1 of arrow net, the other end
It is connected with Electronic Calibration part PORTA.One end of stub cable 2 between instrument is connected with the PORT2 of arrow net, the other end and Electronic Calibration
Part PORTB is connected.Arrow net radio frequency output (Power on) is opened, is selected<Cal → Cal Wizard>, is clicked<measure>, into
Row arrow net S parameter calibration.Note that the S parameter self-correcting result can be used for the uplink of all uplink beams in the calibration frequency range
Road calibration.
Uplink calibration is finally carried out to implement.Keep the connecting pin of stub cable 1 and arrow net PORT1 between instrument constant, separately
One end is connected to " A mouthfuls of arrow net " port on switch matrix front panel, by the corresponding upper planet of the wave beam test cable one end
Be connected to corresponding uplink beam port on switch matrix rear panel (" satellite uplink 1 " or " satellite uplink 2 " or ... or " defend
Star uplink 6 " or ...), the other end is connected to one end of stub cable 2 between instrument, and (other end of stub cable 2 is kept and arrow net between instrument
PORT2 connection it is constant), the corresponding switch matrix internal path of the uplink beam is cut through, arrow net measurement parameter be selected as
S21 opens arrow net radio frequency output (Power on), and setting measurement data format (Format) is logM, measures the uplink beam
Link Insertion Loss at different frequent points, and it is stored as the S2P file inside arrow net, setting measurement data format (Format) is
Delay measures the chain-circuit time delay at the uplink beam different frequent points, and is equally stored as the S2P file inside arrow net.
So far, the uplink calibration of the uplink beam is finished, and the S2P file stored real-time calling and can be looked into
It reads.
(2) down link calibration
Initially set up Measurement channel.<Measurement Class>is selected as<Standard>.In<Freq>, according to
Parameter and the setting of measuring technology documentation requirements calibrate, stop frequency on star, notice that the frequency range need at least cover the down going wave
All channel frequences in beam.Calibration level is set in<Power>, is generally set to 0dBm.
Then arrow net S parameter calibration is carried out.By one end of stub cable 1 between instrument with arrow net PORT1 be connected, the other end with
Electronic Calibration part PORTA is connected.One end of stub cable 2 between instrument is connected with the PORT2 of arrow net, the other end and Electronic Calibration part
PORTB is connected.Arrow net radio frequency output (Power on) is opened, is selected<Cal → Cal Wizard>, is clicked<measure>, is carried out
Swear the calibration of net S parameter.Note that the S parameter self-correcting result can be used for the downlink of all downlink wave beams in the calibration frequency range
Calibration.
Finally carry out down link calibration implementation.The connecting pin of the PORT2 of stub cable 2 and arrow net is constant between holding instrument,
The other end is connected to " B mouthfuls of arrow net " port on switch matrix front panel, by the corresponding lower planet of the wave beam test cable one
End be connected to corresponding downlink wave beam port on switch matrix rear panel (" satellite downlink 1 " or " satellite downlink 2 " or ... or
" satellite downlink 6 " or ...), the other end be connected to stub cable 1 between instrument one end (between instrument the other end of stub cable 1 keep and
The connection of arrow net PORT1 is constant), the corresponding switch matrix internal path of the downlink wave beam is cut through, by switch matrix front panel
" frequency spectrograph " port (i.e. coupling aperture) connection matches criteria load, arrow net measurement parameter is selected as S21, opens arrow net radio frequency output
(Power on), setting measurement data format (Format) are logM, measure the link Insertion Loss at the downlink wave beam different frequent points,
And it is stored as the S2P file inside arrow net, setting measurement data format (Format) is Delay, measures downlink wave beam difference
Chain-circuit time delay at frequency point, and equally it is stored as the S2P file inside arrow net.
So far, the down link calibration of the downlink wave beam is finished, and the S2P file stored real-time calling and can be looked into
It reads.
When test, back segment link calibration data is embedded in leading portion chain calibration environment as amount of bias, complete to be combined into
Satellite-ground link calibration data.
The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.
Claims (4)
1. a kind of satellite repeater test macro calibration method, it is characterised in that include the following steps:
(1) full frequency band phase reference is established to the receiver of vector network analyzer；The method for establishing full frequency band phase reference are as follows:
(201) USB port of phase reference part is connected to the USB port of vector network analyzer, the feed mouth of phase reference part is connected
It is connected to power supply, the input port of phase reference part is connected to the when base reference port of vector network analyzer；By Electronic Calibration
Part is connected to the USB port of vector network analyzer；By the GPIB (0) of the GPIB mouth of power meter and vector network analyzer
Controller mouthfuls are connected；The vector network analyzer is PNA-X series；
(202) reset vector Network Analyzer establishes Measurement channel, setting initial frequency and termination frequency, vector network analysis
Phase reference part that instrument automatic identification is connected, Electronic Calibration part；
(203) output port of phase reference part is connected with the port PORT2 of vector network analyzer, while by the end PORT2
Top 90 degree of two row of horizontal wire jumpers overturnings utilize vector network analyzer automatic measurement & calculation to plumbness later on the right side of mouthful；
(204) port PORTA of Electronic Calibration part is connected with the port PORT1 of vector network analyzer, while the port PORT2
The top two rows of wire jumpers in right side still keep plumbness, utilize vector network analyzer automatic measurement & calculation later；
(205) port PORTA of Electronic Calibration part is connected with the port PORT2 of vector network analyzer, while the port PORT2
The top two rows of wire jumpers in right side still keep plumbness, utilize vector network analyzer automatic measurement & calculation later；
(206) port PORT1 of vector network analyzer is connected with the port PORT2, while top two on the right side of the port PORT2
Row of horizontal wire jumper still keeps plumbness, utilizes vector network analyzer automatic measurement & calculation later；
(207) power sensor is connected to the port PORT1 of vector network analyzer, while will be top on the right side of the port PORT2
Two rows of wire jumpers restore to horizontality, utilize vector network analyzer automatic measurement & calculation later；
(208) port PORTA of Electronic Calibration part is connected with the port PORT1 of vector network analyzer, while the port PORT2
The top two rows of wire jumpers in right side still keep horizontality, utilize vector network analyzer automatic measurement & calculation later；
(209) port PORTA of Electronic Calibration part is connected with the port PORT2 of vector network analyzer, while the port PORT2
The top two rows of wire jumpers in right side still keep horizontality, utilize vector network analyzer automatic measurement & calculation later；
(210) port PORT1 of vector network analyzer is connected with the port PORT2, while top two on the right side of the port PORT2
Row of horizontal wire jumper still keeps horizontality, utilizes vector network analyzer automatic measurement & calculation later；
(2) as unit of the frequency range that satellite to be measured repeater package contains, school is carried out to the leading portion link of satellite repeater test macro
It is quasi-；The leading portion link includes the connecting line of vector network analyzer itself and vector network analyzer and switch matrix
Cable；
(3) calibration of back segment uplink is carried out as unit of the uplink beam that satellite to be measured repeater package contains；The back segment
Uplink includes the uplink connection cables of the uplink and switch matrix and satellite to be measured transponder inside switch matrix；
(4) calibration of back segment downlink is carried out as unit of the downlink wave beam that satellite to be measured repeater package contains；The back segment
Downlink includes the downlink connection cables of the downlink and switch matrix and satellite to be measured transponder inside switch matrix；
(5) step (2)~step (4) result is combined into complete satellite-ground link calibration data.
2. a kind of satellite repeater test macro calibration method according to claim 1, it is characterised in that: the step
(2) to the calibration method of leading portion link in are as follows:
(301) Electronic Calibration part is connected to the USB port of vector network analyzer, by the GPIB mouth and vector network analysis of power meter
Controller mouthfuls of GPIB (0) of instrument are connected；
(302) reset vector Network Analyzer, newly-built two Measurement channels, one of Measurement channel < Measurement
Class>be selected as<Scalar Mixer/Converters+Phase>, setting scanning mode are Linear Frequency, if
Set intermediate-frequency bandwidth, number of scan points, calibration frequency range and calibration level；Another Measurement channel < Measurement Class
>be selected as<Swept IMD Converters>, setting scanning mode is Swept fc, and setting double wave frequency difference, dominant frequency signal connect
Receive intermediate-frequency bandwidth, inter-modulated signal receives intermediate-frequency bandwidth, calibration frequency range；
(303) error threshold of the calibration of power, and the full frequency band phase reference having built up in invocation step (1) are set；
(304) power sensor is connected with the port PORT1 of vector network analyzer, vector network analyzer carries out source automatically
The calibration of power and the calibration of PORT1 port reference receiver power；
(305) port PORTA of Electronic Calibration part is connected with the port PORT1 of vector network analyzer, by Electronic Calibration part
The port PORTB be connected with the port PORT2 of vector network analyzer, vector network analyzer carries out Two-port netwerk SC parameter automatically
Calibration and the response calibration of PORT2 end receiver.
3. a kind of satellite repeater test macro calibration method according to claim 2, it is characterised in that: the step
(3) method of back segment uplink calibration is carried out in are as follows:
(401) Measurement channel is established, setting calibration initial frequency terminates frequency and calibration level；
(402) port PORT1 of vector network analyzer is passed through into the port PORTA of stub cable 1 and Electronic Calibration part between instrument
It is connected, the port PORT2 of vector network analyzer is connected by stub cable 2 between instrument with the port PORTB of Electronic Calibration part,
The radio frequency output for opening vector network analyzer carries out the S parameter calibration of vector network analyzer；
(403) port PORT1 of vector network analyzer is connect by A mouthfuls of arrow net of stub cable 1 between instrument and switch matrix,
By the upper planet connected on switch matrix rear panel the another port of test cable passes through stub cable 2 and vector network between instrument
The port PORT2 of analyzer is connected, and measurement parameter is selected as S21, opens the radio frequency output of vector network analyzer, measures the uplink
Test the link Insertion Loss and chain-circuit time delay at wave beam different frequent points.
4. a kind of satellite repeater test macro calibration method according to claim 2, it is characterised in that: the step
(4) method of back segment down link calibration is carried out in are as follows:
(501) Measurement channel is established, setting calibration initial frequency terminates frequency and calibration level；
(502) port PORT1 of vector network analyzer is passed through into the port PORTA of stub cable 1 and Electronic Calibration part between instrument
It is connected, the port PORT2 of vector network analyzer is connected by stub cable 2 between instrument with the port PORTB of Electronic Calibration part,
The radio frequency output for opening vector network analyzer carries out the S parameter calibration of vector network analyzer；
(503) port PORT2 of vector network analyzer is connect by B mouthfuls of arrow net of stub cable 1 between instrument and switch matrix,
By the lower planet connected on switch matrix the another port of test cable passes through stub cable 2 and vector network analyzer between instrument
The port PORT1 be connected, the corresponding switch matrix internal path of the downlink wave beam is cut through, arrow net measurement parameter be selected as S21, beat
The radio frequency output for opening vector network analyzer measures link Insertion Loss and chain-circuit time delay at downlink test wave beam different frequent points.
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| CN107884694B (en) * | 2017-11-13 | 2019-11-22 | 中国电子科技集团公司第四十一研究所 | A method of utilizing vector network analyzer test amplifier gain efficiency |
| CN108020848B (en) * | 2017-12-25 | 2021-11-16 | 湖南卫导信息科技有限公司 | Frequency conversion-based RDSS navigation signal simulator self-calibration method |
| CN109150331B (en) * | 2018-06-15 | 2021-05-11 | 上海卫星工程研究所 | Satellite multi-transmission channel index parallel automatic test system |
| CN109347539B (en) * | 2018-10-10 | 2021-02-23 | 北京遥感设备研究所 | High-precision absolute time delay calibration method for USB measurement and control responder |
| CN110323571B (en) * | 2019-06-26 | 2021-11-16 | 中国空间技术研究院 | Multi-beam pointing in-orbit calibration method suitable for high-throughput satellite |
| CN110557190A (en) * | 2019-08-25 | 2019-12-10 | 中国科学院国家授时中心 | Time delay measuring method for repeater group of on-orbit satellite |
| CN111064534B (en) * | 2019-12-30 | 2021-10-15 | 北京润科通用技术有限公司 | Method and system for detecting relay satellite communication forwarding relation |
| CN111431587A (en) * | 2020-04-26 | 2020-07-17 | 亚太卫星宽带通信（深圳）有限公司 | Communication satellite return link and forward link testing method |
| CN111766425B (en) * | 2020-06-18 | 2023-03-21 | 深圳市极致汇仪科技有限公司 | Vector network analyzer supporting multi-port parallel test |
| CN112532307B (en) * | 2020-11-30 | 2022-07-29 | 中国空间技术研究院 | High-throughput satellite payload in-orbit testing system and method |
| CN113595658A (en) * | 2021-07-26 | 2021-11-02 | 宋宏平 | Greatly simplified calibration method for radio frequency or microwave multi-port expansion equipment |
| CN114389731B (en) * | 2022-01-19 | 2022-09-23 | 中国人民解放军32039部队 | Automatic on-orbit testing system and method for communication satellite |
| CN115642971B (en) * | 2022-12-22 | 2023-05-09 | 成都华兴汇明科技有限公司 | Simulation file generation method and automatic extraction system for nonlinear parameters of microwave module |
| CN116436538B (en) * | 2023-06-12 | 2023-11-21 | 西安弘捷电子技术有限公司 | Automatic calibration method and system for multi-channel TR (transmitter-receiver) component test |
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