CN102497237A - Radio frequency and microwave synthetic instrument based on PXIe (PCI Extensions for Instrumentation) synthetic instrument architecture - Google Patents
Radio frequency and microwave synthetic instrument based on PXIe (PCI Extensions for Instrumentation) synthetic instrument architecture Download PDFInfo
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Abstract
The invention discloses a radio frequency and microwave synthetic instrument based on a PXIe (PCI Extensions for Instrumentation) synthetic instrument architecture. A control platform accesses to a PXIe bus through a PXIe system controller; a digitizer module, a signal generator module, a down-conversion module, a down-conversion local oscillator, an up-conversion module and an up-conversion local oscillator all access to the PXIe bus; signal line direct channels are respectively arranged between a synthetic instrument hardware interface and the digitizer module and between the synthetic instrument hardware interface and the signal generator module; the down-conversion module is connected with the down-conversion local oscillator and the digitizer module, and the up-conversion module is connected with the up-conversion local oscillator and the signal generator module; the down-conversion module and the up-conversion module are connected with the synthetic instrument hardware interface; and the control platform can enable the synthetic instrument to have different functions through configurations. The synthetic instrument provided by the invention can be used for realizing the miniaturization of a communication/radar electronic equipment test system by sharing a processing module and can meet the requirements of a new generation of automatic test systems.
Description
Technical field
The present invention relates to the RF Instrument technology field, particularly relate to a kind of radio frequency and microwave integrated instrument based on PXIe synthetic instrument framework.
Background technology
Problem maximum in the current Auto-Test System is not in the Auto-Test System of new equipment, to receive advanced technology to make it reach higher test performance, but to existing and new Auto-Test System more than 20 years or the problem of management in cycle long-life more.
The renewal of armament systems and management have prolonged life-span of armament systems, possibly be 20 years or longer, and this requires Auto-Test System also can in the so long time, ensure it.The expense of the out-of-date problem of management that armament systems continue is guaranteed comparatively speaking, but will just difficulty of a large sum of expense be provided more for existing test macro.Therefore, in order to occur same problem after preventing, just must solve following out-of-date problem of management of Auto-Test System now.
A large amount of test safeguard work that adopt special design circuit to accomplish armament systems at present domestic Auto-Test System and the external early stage Auto-Test System; These testers are just out-of-date technically very soon; Because can't obtain spare part; The safeguard work more and more difficult, and maintenance cost is also increasingly high.
At present; Synthetic instrument is a kind of technological preferably solution route; The development of synthetic instrument is that people can select different synthetic instrument parts to satisfy the requirement of required instrument performance aspect, to avoid the out-of-date problem of equipment and technology to the replenishing of traditional single instrument.Since the signal of synthetic instrument take place with signal processing etc. through accomplishing, through download new procedures or the newer driver performance that just can change or expand instrument more with the irrelevant software program of hardware platform.When technological out-of-date problem occurring, adopt general programming standard such as IVI to carry out the transition at an easy rate on the alternative hardware and software.Along with the fast development of personal computer, data-handling capacity has been strengthened, and expense has reduced.A/D and D/A converter be commercialization also, and conversion speed and resolution improve year by year.These all are that synthetic instrument provides strong technical support.
PXIe is a test bus of new generation, has the performance of littler volume and Geng Gao, and therefore, the synthetic instrument with PXIe framework can solve outside communication/radar electric Equipment Test system miniaturization, also has the mobility of lower cost and Geng Gao.
Summary of the invention
In view of this, the present invention provides a kind of RF integrated instrument based on PXIe synthetic instrument framework, through shared processing module, to solve the miniaturization of communication/radar electric Equipment Test system, satisfies the demand of Auto-Test System of new generation.
For achieving the above object, this scheme is achieved in that
A kind of radio frequency and microwave integrated instrument based on PXIe synthetic instrument framework, this integrated instrument comprises controlling platform, PXIe system controller, digitizer module, signal generator module, down conversion module, down-conversion local oscillator, up-conversion module, up-conversion local oscillator and synthetic instrument hardware interface;
Controlling platform inserts the PXIe bus through the PXIe system controller; Digitizer module, signal generator module, down conversion module, down-conversion local oscillator, up-conversion module and up-conversion local oscillator all insert the PXIe bus, have the holding wire put-through channel between synthetic instrument hardware interface and digitizer module and synthetic instrument hardware interface and the signal generator module; Down conversion module connects down-conversion local oscillator and digitizer module, and the up-conversion module connects up-conversion local oscillator and signal generator module; Down conversion module is connected the synthetic instrument hardware interface with the up-conversion module;
The PXIe system controller is used for information with controlling platform and is compiled as the data that meet the PXIe bus protocol and on the PXIe bus, transmits, and resolves the data of obtaining from the PXIe bus and sends to controlling platform;
The signal generator module is through selecting as AWG or baseband signal generator; This signal generator module comprises that two signals produce passage; As the random wave generator time; Adopt any signal to produce passage, produce waveform signal according to configuration information and output to the synthetic instrument hardware interface through the holding wire put-through channel from the PXIe bus; As the base band generator time, according to the configuration information from the PXIe bus, the IQ two paths of signals of two signal generation passage generation quadratures outputs to the up-conversion module as baseband signal;
The up-conversion module is used for the baseband signal of coming the automatic signal generator module is carried out up-conversion, launches through the synthetic instrument hardware interface then;
The up-conversion local oscillator is used to the up-conversion module local oscillation signal is provided;
Down conversion module is used for the radiofrequency signal from the synthetic instrument hardware interface is carried out down-conversion, then the intermediate-freuqncy signal that obtains is sent to the digitizer module;
The down-conversion local oscillator is used to down conversion module local oscillation signal is provided;
As time-domain digital appearance or if digitization appearance, this digitizer module sends to controlling platform according to from the configuration information of PXIe bus the frequency signal that receives being selected the function corresponding processing to the digitizer module then through selected;
Controlling platform is used for carrying out each modules configured according to selected this integrated instrument function in outside:
Elected domain digitizer function: controlling platform directly receives low frequency signal from the synthetic instrument hardware interface through PXIe bus configuration digitizer module through the holding wire put-through channel; By the digitizer module low frequency signal is handled, through the PXIe bus result is sent to controlling platform then;
When selected if digitization appearance function: controlling platform is through the PXIe bus starting and dispose down-conversion local oscillator and down conversion module; Configuration digitizer module is directly from the down conversion module receiving intermediate frequency signal; Intermediate-freuqncy signal is handled, through the PXIe bus result is sent to controlling platform then;
When selected random wave generator function: controlling platform switches to the AWG function through PXIe bus starting signal generator module, and the waveform that produces is sent to the synthetic instrument hardware interface through the holding wire put-through channel;
When selected radio-frequency signal source function: controlling platform switches to the baseband signal generator function through PXIe bus starting signal generator module; And start and configuration up-conversion module and up-conversion local oscillator module, baseband signal generator sends to the up-conversion module with the two-way IQ two paths of signals that produces.
Wherein, said if digitization appearance function comprises the radio frequency spectrometer function; Said controlling platform is further used for:
When selected said digitizer module was in the radio frequency spectrometer function, controlling platform disposed local frequency circulation change in a scope of down-conversion local oscillator through PXIe bus starting down-conversion local oscillator and down conversion module work, thereby realized the frequency sweep function; Down conversion module has a plurality of IF-FRE IF, the corresponding bandwidth of each IF, and the IF of controlling platform configuration down conversion module makes the signal of exporting to the digitizer module in required bandwidth; Controlling platform is passed through PXIe bus configuration digitizer module directly from the down conversion module receiving intermediate frequency signal; By the digitizer module intermediate-freuqncy signal is gathered and stored; Through the PXIe bus Wave data of storing is sent to controlling platform then, accomplish the spectrum analysis process by controlling platform;
Wherein, if digitization appearance function comprises the VSA function; Said controlling platform is further used for:
When selected said digitizer module is in the VSA function; Controlling platform is through PXIe bus starting down-conversion local oscillator and down conversion module work; The local frequency of configuration down-conversion local oscillator is fixed on preset point frequently; The IF of configuration down conversion module makes the signal of exporting to the digitizer module in required bandwidth; Controlling platform configuration digitizer module is directly from the down conversion module receiving intermediate frequency signal; By the digitizer module intermediate-freuqncy signal is carried out Digital Down Convert; Obtain I, Q component sends to controlling platform through the PXIe bus, accomplishes the vector signal analytic function by controlling platform.
Preferably, said digitizer module comprises if digitization appearance input port, time-domain digital appearance input port, port selection circuit, signal conditioning circuit, A/D change-over circuit and digital processing element; Said digital processing element comprises if digitization appearance digital signal processing channel, time-domain digital appearance digital signal processing channel and PXIe EBI;
When a) the digitizer module is in time-domain digital appearance function:
Port selects circuit according to selecting time-domain digital appearance input port to receive the signal from the synthetic instrument hardware interface from the configuration information of PXIe bus, sends into time-domain digital appearance digital signal processing channel behind received signal process signal conditioning circuit and the A/D change-over circuit; Time-domain digital appearance digital signal processing channel is realized detection trigger, storage and waveform parameter estimation processing, and result is sent into controlling platform through the PXIe EBI;
When b) the digitizer module is in if digitization appearance function:
Port selects circuit according to selecting if digitization appearance input port to receive the signal from down conversion module from the configuration information of PXIe bus, sends into if digitization appearance digital signal processing channel behind received signal process signal conditioning circuit and the A/D change-over circuit; If digitization appearance digital signal processing channel is realized Digital Down Convert, storage, and result is sent into controlling platform through the PXIe EBI.
Preferably, said signal generator module comprises AWG port, baseband signal generator I port, baseband signal generator Q port, PXIe EBI, waveform engine, memory management module, storage chip, base band signal process engine, binary channels D/A converter, signal conditioning circuit A and signal conditioning circuit B;
When c) the signal generator module is in the AWG function:
The PXIe EBI downloads to the Wave data of controlling platform configuration in the storage chip through memory management module; After the startup work; The waveform engine obtains Wave data through memory management module from storage chip; And one of them passage of directly giving the binary channels D/A converter carries out exporting after the digital-to-analogue conversion; Signal conditioning circuit A carries out amplitude adjustment and bias operation according to the waveform parameter of configuration to the output of binary channels D/A converter, and analog waveform signal is directly exported to the synthetic instrument hardware interface through the AWG port the most at last;
When d) the signal generator module is in the baseband signal generator function:
The PXIe EBI downloads to the Wave data of controlling platform configuration in the storage chip through memory management module; After the startup work; The waveform engine obtains Wave data through memory management module from storage chip; And give the base band signal process engine and carry out interior inserting and the digital filtering processing; Obtain I, Q two ways of digital signals; Two passages that I, Q two ways of digital signals are given the binary channels D/A converter respectively carry out digital-to-analogue conversion, and two signal conditioning circuits carry out amplitude adjustment and bias operation according to the waveform parameter of configuration to the two paths of signals of binary channels D/A converter output, and I, Q two-way analog signal are sent through baseband signal generator I port and Q port and exported to the up-conversion module the most at last.
Beneficial effect:
The present invention is based on the PXIe framework, designed a kind of integrated instrument that combines signal source and analyzer.Controlling platform is operated under certain function through this instrument of PXIe bus configuration.The present invention has adopted shared processing module, to solve the miniaturization issues of communication/radar electric Equipment Test system.Through the PXIe bus, the controlling platform function of digitizer module and signal generator module of can also upgrading, thus satisfied the needs that test macro updates.The present invention also provides the enforcement example of digitizer module and signal generator module, and the module of its total as much as possible identical function helps device miniaturization.
Description of drawings
Fig. 1 is the structural representation that the present invention is based on the RF integrated instrument of PXIe synthetic instrument framework.
Fig. 2 is the concrete structure sketch map of digitizer module among Fig. 1.
Fig. 3 is the concrete structure sketch map of signal generator module among Fig. 1.
Embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention describes in further detail.
The embodiment of the invention provides a kind of RF integrated instrument based on PXIe synthetic instrument framework; As shown in Figure 1, this integrated instrument comprises controlling platform, PXIe system controller, digitizer module, signal generator module, down conversion module, down-conversion local oscillator, up-conversion module, up-conversion local oscillator and synthetic instrument hardware interface.Above-mentioned these building blocks can be arranged in the PXIe cabinet, and the PXIe system controller can adopt PXIe embedded system controller or PXIe external hanging type system controller.And, the goods shelf products that PXIe cabinet, PXIe system controller can selection standards.
The annexation of above-mentioned each module is: controlling platform inserts the PXIe bus through the PXIe system controller; Digitizer module, signal generator module, down conversion module, down-conversion local oscillator, up-conversion module and up-conversion local oscillator all insert the PXIe bus, have the holding wire put-through channel between synthetic instrument hardware interface and digitizer module and synthetic instrument hardware interface and the signal generator module; Down conversion module connects down-conversion local oscillator and digitizer module, and the up-conversion module connects up-conversion local oscillator and signal generator module; Down conversion module is connected the synthetic instrument hardware interface with the up-conversion module; The synthetic instrument hardware interface transmits or receives the signal from the outside to outside measurand.
Signal generator module, up-conversion local oscillator, up-conversion module constitute the RF signal source, can produce random waveform or baseband signal that the user is provided with.Digitizer module, down-conversion local oscillator, down conversion module constitute the RF analytical instrument, and it can be used as RF instruments commonly used such as spectrum analyzer, VSA.Controlling platform is passed through PXIe bus gating corresponding module, thereby realizes that this integrated instrument is in wherein a kind of function.
Function in the face of each building block is described in detail down.
The PXIe system controller is used for information with controlling platform and is compiled as the data that meet the PXIe bus protocol and on the PXIe bus, transmits, and resolves the data of obtaining from the PXIe bus and sends to controlling platform.
The signal generator module is through selected AWG or the baseband signal generator of can be used as.This signal generator module comprises that two signals produce passage; As the random wave generator time; Adopt any signal to produce passage, produce the setting waveform according to configuration information and output to the synthetic instrument hardware interface through the holding wire put-through channel from the PXIe bus; As the base band generator time, according to the configuration information from the PXIe bus, the IQ two paths of signals of two signal generation passage generation quadratures outputs to the up-conversion module as baseband signal.Through the PXIe bus can the update signal generator module firmware so that upgrading.
The up-conversion module is used for the baseband signal of coming the automatic signal generator module is carried out up-conversion, launches through the synthetic instrument hardware interface then.
The up-conversion local oscillator is used to the up-conversion module local oscillation signal is provided.
Down conversion module is used for the radiofrequency signal from the synthetic instrument hardware interface is carried out down-conversion, then the intermediate-freuqncy signal that obtains is sent to the digitizer module.
The down-conversion local oscillator is used to down conversion module local oscillation signal is provided.
To can be used as the time-domain digital appearance be oscilloscope or the if digitization appearance with data processing function to the digitizer module through selected; This digitizer module is carried out handled according to the configuration information from the PXIe bus to the frequency signal that receives, and sends to controlling platform then.Can upgrade the firmware of digitizer module through the PXIe bus, so that upgrade.
Controlling platform is used for according to selected this integrated instrument function in outside each module being configured:
(1) be elected to domain digitizer function: controlling platform directly receives low frequency signal from the synthetic instrument hardware interface through PXIe bus configuration digitizer module through the holding wire put-through channel; By the digitizer module low frequency signal is handled, through the PXIe bus result (Wave data of storage and waveform parameter) is sent to controlling platform then;
(2) when selected if digitization appearance function: controlling platform is through PXIe bus starting down-conversion local oscillator and down conversion module work; Controlling platform is passed through PXIe bus configuration digitizer module directly from the down conversion module receiving intermediate frequency signal; Intermediate-freuqncy signal is handled, through the PXIe bus result is sent to controlling platform then.
If digitization appearance function can also be embodied as radio frequency spectrometer function, VSA function and other if digitization appearance functions.Specifically:
● when selected radio frequency spectrometer function:
Controlling platform disposes local frequency circulation change in a scope of down-conversion local oscillator through PXIe bus starting down-conversion local oscillator and down conversion module work, thereby realizes the frequency sweep function; Down conversion module has a plurality of IF-FRE IF, the corresponding bandwidth of each IF, and the IF of controlling platform configuration down conversion module makes the signal of exporting to the digitizer module in required bandwidth; Controlling platform is passed through PXIe bus configuration digitizer module directly from the down conversion module receiving intermediate frequency signal; By the digitizer module intermediate-freuqncy signal is gathered and stored; Through the PXIe bus Wave data and the waveform parameter of storing are sent to controlling platform then, controlling platform is accomplished the spectrum analysis process.
● when selected VSA function:
Controlling platform is through PXIe bus starting down-conversion local oscillator and down conversion module work, and the local frequency of configuration down-conversion local oscillator is fixed on preset point frequently, and the IF of configuration down conversion module makes the signal of exporting to the digitizer module in required bandwidth; Controlling platform configuration digitizer module is directly from the down conversion module receiving intermediate frequency signal; By the digitizer module intermediate-freuqncy signal is carried out Digital Down Convert; Obtain I, Q component sends to controlling platform through the PXIe bus, controlling platform is accomplished the vector signal analytic function.
(3) when selected random wave generator function: controlling platform switches to the AWG function through PXIe bus starting signal generator module, and the waveform that produces is sent via the synthetic instrument hardware interface through the holding wire put-through channel.
(4) when selected radio-frequency signal source function: controlling platform switches to the baseband signal generator function through PXIe bus starting signal generator module; And start and configuration up-conversion module and up-conversion local oscillator module, baseband signal generator sends to the up-conversion module with the two-way IQ two paths of signals that produces.
Preferentially, when integrated instrument processing frequency was higher, this integrated instrument may further include first line switch, and this preselector is a programmable filter.First line switch links to each other with down conversion module and inserts PXIe bus, the first line switch radiofrequency signal that filtering is imported from the synthetic instrument hardware interface before down conversion module; The radiofrequency signal Filtering Processing is participated in or do not participated in to controlling platform through PXIe bus configuration first line switch, and participate in the centre frequency under the Filtering Processing situation.
Equally, this integrated instrument can further include second preselector, and this preselector is a programmable filter.Second preselector links to each other with the up-conversion module and inserts the PXIe bus, and second preselector carries out filtering to the radiofrequency signal of up-conversion module output; The radiofrequency signal Filtering Processing is participated in or do not participated in to controlling platform through PXIe bus configuration second preselector, and participate in the centre frequency under the Filtering Processing situation.
It is thus clear that, the present invention is based on the PXIe framework, designed a kind of integrated instrument that combines signal source and analyzer.Controlling platform is operated under certain function through this instrument of PXIe bus configuration.The present invention has adopted shared processing module, to solve the miniaturization issues of communication/radar electric Equipment Test system.Through the PXIe bus, the controlling platform function of digitizer module and signal generator module of can also upgrading, thus satisfied the needs that test macro updates.
Fig. 2 is the concrete structure sketch map of digitizer module in the present embodiment.As shown in Figure 2; The digitizer module has two input ports; Be respectively if digitization appearance input port and time-domain digital appearance input port, if digitization appearance input port connects down conversion module, and time-domain digital appearance input port connects the synthetic instrument hardware interface.The digitizer module also comprises port selection circuit, signal conditioning circuit, A/D change-over circuit and digital processing element.Digital processing element comprises if digitization appearance digital signal processing channel, time-domain digital appearance digital signal processing channel and PXIe EBI.
When a) being in time-domain digital appearance function; Port selects circuit according to the signal of selecting time-domain digital appearance input port from the configuration information of PXIe bus; Send into time-domain digital appearance digital signal processing channel behind received signal process signal conditioning circuit and the A/D change-over circuit; Time-domain digital appearance digital signal processing channel is mainly realized detection trigger, storage and waveform parameter estimation processing, and result is sent into controlling platform through the PXIe EBI.
When b) being in if digitization appearance function; Port selects circuit according to the signal of selecting if digitization appearance input port from the configuration information of PXIe bus; Send into if digitization appearance digital signal processing channel behind received signal process signal conditioning circuit and the A/D change-over circuit; If digitization appearance digital signal processing channel is mainly realized Digital Down Convert and storage, and result is sent into controlling platform through the PXIe EBI.
Preceding text mention that if digitization appearance function specifically is divided into radio frequency spectrometer function and VSA function.When selected radio frequency spectrometer function, if digitization appearance digital signal processing channel is accomplished intermediate-freuqncy signal and is gathered and store, and through the PXIe bus Wave data of storage is sent to controlling platform then; When selected VSA function, if digitization appearance digital signal processing channel carries out Digital Down Convert to intermediate-freuqncy signal, obtains I, Q component sends to controlling platform through the PXIe bus.
This digital processing element can be realized through fpga chip or fpga chip+dsp chip.
Fig. 3 is the concrete structure sketch map of signal generator module in the present embodiment.As shown in Figure 3, this signal generator module has three output ports, is respectively AWG output port, baseband signal generator I port and baseband signal generator Q port.The signal generator module also comprises PXIe EBI, waveform engine, memory management module, storage chip, base band signal process engine, binary channels D/A converter, signal conditioning circuit A and signal conditioning circuit B.AWG signal and baseband signal generator I branch road are shared same signal conditioning circuit A; Two signal conditioning circuit A, B connect the A of binary channels D/A converter, the output of two passages of B respectively; The input of binary channels D/A converter A channel connects the I road signal output and the waveform engine of base band signal process engine, and the input of binary channels D/A converter B passage connects the Q road signal output of base band signal process engine.
When c) being in the AWG function, the PXIe EBI downloads to the Wave data (can be the normalization Wave data here) of controlling platform configuration in the storage chip through memory management module.After the startup work; The waveform engine obtains Wave data through memory management module from storage chip; And directly give the A channel of binary channels D/A converter; Signal conditioning circuit A carries out amplitude adjustment (amplify, decay) and bias operation according to the waveform parameter of configuration to the output of binary channels D/A converter, and the analog waveform signal that obtains is the most at last delivered to the AWG port.
When d) being in the baseband signal generator function; The PXIe EBI downloads to the Wave data of controlling platform configuration in the storage chip through memory management module; After the startup work; The waveform engine obtains Wave data through memory management module from storage chip; And give the base band signal process engine and carry out interior inserting and the digital filtering processing, obtaining I, Q two ways of digital signals, two passages that I, Q two ways of digital signals are given the binary channels D/A converter respectively carry out digital-to-analogue conversion; Two signal conditioning circuits carry out amplitude adjustment (amplify, decay) and bias operation according to the waveform parameter of configuration to the two paths of signals of binary channels D/A converter output, and I, Q two-way analog signal are delivered to the I port and the Q port of baseband signal generator the most at last.
Structure shown in Fig. 2 and Fig. 3 is shared module at utmost, helps miniaturization.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (9)
1. radio frequency and microwave integrated instrument based on a PXIe synthetic instrument framework; It is characterized in that this integrated instrument comprises controlling platform, PXIe system controller, digitizer module, signal generator module, down conversion module, down-conversion local oscillator, up-conversion module, up-conversion local oscillator and synthetic instrument hardware interface;
Controlling platform inserts the PXIe bus through the PXIe system controller; Digitizer module, signal generator module, down conversion module, down-conversion local oscillator, up-conversion module and up-conversion local oscillator all insert the PXIe bus, have the holding wire put-through channel between synthetic instrument hardware interface and digitizer module and synthetic instrument hardware interface and the signal generator module; Down conversion module connects down-conversion local oscillator and digitizer module, and the up-conversion module connects up-conversion local oscillator and signal generator module; Down conversion module is connected the synthetic instrument hardware interface with the up-conversion module;
The PXIe system controller is used for information with controlling platform and is compiled as the data that meet the PXIe bus protocol and on the PXIe bus, transmits, and resolves the data of obtaining from the PXIe bus and sends to controlling platform;
The signal generator module is through selecting as AWG or baseband signal generator; This signal generator module comprises that two signals produce passage; As the random wave generator time; Adopt any signal to produce passage, produce waveform signal according to configuration information and output to the synthetic instrument hardware interface through the holding wire put-through channel from the PXIe bus; As the base band generator time, according to the configuration information from the PXIe bus, the IQ two paths of signals of two signal generation passage generation quadratures outputs to the up-conversion module as baseband signal;
The up-conversion module is used for the baseband signal of coming the automatic signal generator module is carried out up-conversion, launches through the synthetic instrument hardware interface then;
The up-conversion local oscillator is used to the up-conversion module local oscillation signal is provided;
Down conversion module is used for the radiofrequency signal from the synthetic instrument hardware interface is carried out down-conversion, then the intermediate-freuqncy signal that obtains is sent to the digitizer module;
The down-conversion local oscillator is used to down conversion module local oscillation signal is provided;
As time-domain digital appearance or if digitization appearance, this digitizer module sends to controlling platform according to from the configuration information of PXIe bus the frequency signal that receives being selected the function corresponding processing to the digitizer module then through selected;
Controlling platform is used for carrying out each modules configured according to selected this integrated instrument function in outside:
Elected domain digitizer function: controlling platform directly receives low frequency signal from the synthetic instrument hardware interface through PXIe bus configuration digitizer module through the holding wire put-through channel; By the digitizer module low frequency signal is handled, through the PXIe bus result is sent to controlling platform then;
When selected if digitization appearance function: controlling platform is through the PXIe bus starting and dispose down-conversion local oscillator and down conversion module; Configuration digitizer module is directly from the down conversion module receiving intermediate frequency signal; Intermediate-freuqncy signal is handled, through the PXIe bus result is sent to controlling platform then;
When selected random wave generator function: controlling platform switches to the AWG function through PXIe bus starting signal generator module, and the waveform that produces is sent to the synthetic instrument hardware interface through the holding wire put-through channel;
When selected radio-frequency signal source function: controlling platform switches to the baseband signal generator function through PXIe bus starting signal generator module; And start and configuration up-conversion module and up-conversion local oscillator module, baseband signal generator sends to the up-conversion module with the two-way IQ two paths of signals that produces.
2. integrated instrument as claimed in claim 1 is characterized in that this integrated instrument further comprises first line switch;
First line switch links to each other with down conversion module and inserts PXIe bus, the radiofrequency signal of first line switch filtering input before down conversion module; The radiofrequency signal Filtering Processing is participated in or do not participated in to controlling platform through PXIe bus configuration first line switch, and participate in the centre frequency under the Filtering Processing situation.
3. integrated instrument as claimed in claim 1 is characterized in that this integrated instrument further comprises second preselector;
Second preselector links to each other with the up-conversion module and inserts the PXIe bus, and second preselector carries out filtering to the radiofrequency signal of up-conversion module output; The radiofrequency signal Filtering Processing is participated in or do not participated in to controlling platform through PXIe bus configuration second preselector, and participate in the centre frequency under the Filtering Processing situation.
4. integrated instrument as claimed in claim 1 is characterized in that, said if digitization appearance function comprises the radio frequency spectrometer function; Said controlling platform is further used for:
When selected said digitizer module was in the radio frequency spectrometer function, controlling platform disposed local frequency circulation change in a scope of down-conversion local oscillator through PXIe bus starting down-conversion local oscillator and down conversion module work, thereby realized the frequency sweep function; Down conversion module has a plurality of IF-FRE IF, the corresponding bandwidth of each IF, and the IF of controlling platform configuration down conversion module makes the signal of exporting to the digitizer module in required bandwidth; Controlling platform is passed through PXIe bus configuration digitizer module directly from the down conversion module receiving intermediate frequency signal; By the digitizer module intermediate-freuqncy signal is gathered and stored; Through the PXIe bus Wave data of storing is sent to controlling platform then, accomplish the spectrum analysis process by controlling platform.
5. integrated instrument as claimed in claim 1 is characterized in that, if digitization appearance function comprises the VSA function; Said controlling platform is further used for:
When selected said digitizer module is in the VSA function; Controlling platform is through PXIe bus starting down-conversion local oscillator and down conversion module work; The local frequency of configuration down-conversion local oscillator is fixed on preset point frequently; The IF of configuration down conversion module makes the signal of exporting to the digitizer module in required bandwidth; Controlling platform configuration digitizer module is directly from the down conversion module receiving intermediate frequency signal; By the digitizer module intermediate-freuqncy signal is carried out Digital Down Convert; Obtain I, Q component sends to controlling platform through the PXIe bus, accomplishes the vector signal analytic function by controlling platform.
6. integrated instrument as claimed in claim 1 is characterized in that, said digitizer module comprises if digitization appearance input port, time-domain digital appearance input port, port selection circuit, signal conditioning circuit, A/D change-over circuit and digital processing element; Said digital processing element comprises if digitization appearance digital signal processing channel, time-domain digital appearance digital signal processing channel and PXIe EBI;
When a) the digitizer module is in time-domain digital appearance function:
Port selects circuit according to selecting time-domain digital appearance input port to receive the signal from the synthetic instrument hardware interface from the configuration information of PXIe bus, sends into time-domain digital appearance digital signal processing channel behind received signal process signal conditioning circuit and the A/D change-over circuit; Time-domain digital appearance digital signal processing channel is realized detection trigger, storage and waveform parameter estimation processing, and result is sent into controlling platform through the PXIe EBI;
When b) the digitizer module is in if digitization appearance function:
Port selects circuit according to selecting if digitization appearance input port to receive the signal from down conversion module from the configuration information of PXIe bus, sends into if digitization appearance digital signal processing channel behind received signal process signal conditioning circuit and the A/D change-over circuit; If digitization appearance digital signal processing channel is realized Digital Down Convert, storage, and result is sent into controlling platform through the PXIe EBI.
7. integrated instrument as claimed in claim 1; It is characterized in that said signal generator module comprises AWG port, baseband signal generator I port, baseband signal generator Q port, PXIe EBI, waveform engine, memory management module, storage chip, base band signal process engine, binary channels D/A converter, signal conditioning circuit A and signal conditioning circuit B;
When c) the signal generator module is in the AWG function:
The PXIe EBI downloads to the Wave data of controlling platform configuration in the storage chip through memory management module; After the startup work; The waveform engine obtains Wave data through memory management module from storage chip; And one of them passage of directly giving the binary channels D/A converter carries out exporting after the digital-to-analogue conversion; Signal conditioning circuit A carries out amplitude adjustment and bias operation according to the waveform parameter of configuration to the output of binary channels D/A converter, and analog waveform signal is directly exported to the synthetic instrument hardware interface through the AWG port the most at last;
When d) the signal generator module is in the baseband signal generator function:
The PXIe EBI downloads to the Wave data of controlling platform configuration in the storage chip through memory management module; After the startup work; The waveform engine obtains Wave data through memory management module from storage chip; And give the base band signal process engine and carry out interior inserting and the digital filtering processing; Obtain I, Q two ways of digital signals; Two passages that I, Q two ways of digital signals are given the binary channels D/A converter respectively carry out digital-to-analogue conversion, and two signal conditioning circuits carry out amplitude adjustment and bias operation according to the waveform parameter of configuration to the two paths of signals of binary channels D/A converter output, and I, Q two-way analog signal are sent through baseband signal generator I port and Q port and exported to the up-conversion module the most at last.
8. integrated instrument as claimed in claim 1 is characterized in that said controlling platform is further used for, and upgrades the firmware of digitizer module and signal generator module through the PXIe bus.
9. integrated instrument as claimed in claim 1 is characterized in that, said PXIe system controller adopts PXIe embedded system controller or PXIe external hanging type system controller.
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