CN102497237B - 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 RF/Microwave 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 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, extended life-span of armament systems, may be 20 years or longer, and this requires Auto-Test System also can within the so long time, to it, ensure.The expense of the out-of-date problem of management that armament systems continue is guaranteed comparatively speaking, but will provide just difficulty many of a large sum of expense 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.
Current a large amount of test safeguard work that adopt special design circuit to complete armament systems in domestic Auto-Test System and external early stage Auto-Test System, these testers are just out-of-date technically very soon, because cannot obtain spare part, safeguard work is more and more difficult, and maintenance cost is also more and more higher.
At present, synthetic instrument is a kind of good technology solution route, the development of synthetic instrument is that people can select different synthetic instrument parts to meet the requirement of required instrument performance aspect, to avoid the out-of-date problem of equipment and technology to the supplementing of traditional single instrument.Due to the signal of synthetic instrument occur and signal processing etc. by completing with the irrelevant software program of hardware platform, by download new procedures or more newer driver just can change or expand the performance of instrument.When there is the out-of-date problem of technology, adopt general programming standard can be transitioned at an easy rate on alternative hardware and software as IVI.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 are all for synthetic instrument provides strong technical support.
PXIe is test bus of new generation, has the performance of less volume and Geng Gao, and therefore, the synthetic instrument with PXIe framework can solve outside the miniaturization of communication/radar electric equipment Test system, also has the mobility of lower cost and Geng Gao.
Summary of the invention
In view of this, the invention provides a kind of RF/Microwave integrated instrument based on PXIe synthetic instrument framework, by sharing processing module, to solve the miniaturization of communication/radar electric equipment Test system, meet the demand of Auto-Test System of new generation.
For achieving the above object, this scheme is achieved in that
Radio frequency based on PXIe synthetic instrument framework and a microwave integrated instrument, this integrated instrument comprises controls platform, PXIe system controller, digitalizer module, signal generator module, down conversion module, down-conversion local oscillator, up-converter module, up-conversion local oscillator and synthetic instrument hardware interface;
Control platform by PXIe system controller access PXIe bus, digitalizer module, signal generator module, down conversion module, down-conversion local oscillator, up-converter module and up-conversion local oscillator all access PXIe bus, between synthetic instrument hardware interface and digitalizer module and synthetic instrument hardware interface and signal generator module, have holding wire put-through channel; Down conversion module connects down-conversion local oscillator and digitalizer module, and up-converter module connects up-conversion local oscillator and signal generator module; Down conversion module is connected synthetic instrument hardware interface with up-converter module;
PXIe system controller, the data that meet PXIe bus protocol for the information of controlling platform is compiled as are transmitted in PXIe bus, resolve the Data Concurrent obtaining from PXIe bus and give control platform;
Signal generator module is by selecting as AWG (Arbitrary Waveform Generator) or baseband signal generator; This signal generator module comprises that two signals produce passage, when as Arbitrary Waveform Generator, adopt any one signal to produce passage, according to the configuration information from PXIe bus, produce waveform signal and output to synthetic instrument hardware interface by holding wire put-through channel; When as base band generator, according to the configuration information from PXIe bus, the IQ two paths of signals of two signal generation passage generation quadratures outputs to up-converter module as baseband signal;
Up-converter module, for to coming the baseband signal of automatic signal generator module to carry out up-conversion, then launches by synthetic instrument hardware interface;
Up-conversion local oscillator, is used to up-converter module that local oscillation signal is provided;
Down conversion module, carries out down-conversion for the radiofrequency signal to from synthetic instrument hardware interface, then the intermediate-freuqncy signal obtaining is sent to digitalizer module;
Down-conversion local oscillator, is used to down conversion module that local oscillation signal is provided;
Digitalizer module is by selected as time-domain digital instrument or if digitization instrument, and this digitalizer module, according to the frequency signal receiving being selected to processing corresponding to function from the configuration information of PXIe bus, then sends to control platform;
Control platform, for carrying out the configuration of each module according to selected this integrated instrument function in outside:
Elected domain digitizer function: control platform and directly receive low frequency signal from synthetic instrument hardware interface by PXIe bus configuration digitalizer module by holding wire put-through channel, by digitalizer module, low frequency signal is processed, then by PXIe bus, result is sent to control platform;
When selected if digitization instrument function: control platform by PXIe bus starting and configure down-conversion local oscillator and down conversion module, configuration digitalizer module is directly from down conversion module receiving intermediate frequency signal, intermediate-freuqncy signal is processed, then by PXIe bus, result is sent to control platform;
When selected Arbitrary Waveform Generator function: control platform and be switched to AWG (Arbitrary Waveform Generator) function by PXIe bus starting signal generator module, and the waveform of generation is sent to synthetic instrument hardware interface by holding wire put-through channel;
When selected radio-frequency signal source function: control platform and be switched to baseband signal generator function by PXIe bus starting signal generator module, and start and configuration up-converter module and up-conversion local oscillator module, baseband signal generator sends to up-converter module by the two-way IQ two paths of signals of generation.
Wherein, described if digitization instrument function comprises radio frequency spectrometer function; Described control platform is further used for:
When selected described digitalizer module is during in radio frequency spectrometer function, control platform and work by PXIe bus starting down-conversion local oscillator and down conversion module, local frequency circulation change within the scope of of configuration down-conversion local oscillator, thus realize frequency sweep function; Down conversion module has a plurality of IF-FRE IF, the corresponding bandwidth of each IF, and the IF of control platform configuration down conversion module, makes the signal of exporting to digitalizer module in required bandwidth; Control platform and pass through PXIe bus configuration digitalizer module directly from down conversion module receiving intermediate frequency signal, by digitalizer module, intermediate-freuqncy signal is gathered and stored, then by PXIe bus, the Wave data of storage is sent to control platform, by controlling platform, complete spectrum analysis process;
Wherein, if digitization instrument function comprises VSA function; Described control platform is further used for:
When selected described digitalizer module is during in VSA function, controlling platform works by PXIe bus starting down-conversion local oscillator and down conversion module, the local frequency of configuration down-conversion local oscillator is fixed on default point frequently, the IF of configuration down conversion module, makes the signal of exporting to digitalizer module in required bandwidth; Control platform configuration digitalizer module directly from down conversion module receiving intermediate frequency signal, by digitalizer module, intermediate-freuqncy signal is carried out to Digital Down Convert, obtain I, Q component sends to control platform by PXIe bus, by controlling platform, completes Vector Signal Analysis function.
Preferably, described digitalizer module comprises if digitization instrument input port, time-domain digital instrument input port, port selection circuit, signal conditioning circuit, A/D change-over circuit and digital processing element; Described digital processing element comprises if digitization instrument digital signal processing channel, time-domain digital instrument digital signal processing channel and PXIe bus interface;
A) digitalizer module is when time-domain digital instrument function:
Port selects circuit to select time-domain digital instrument input port to receive the signal from synthetic instrument hardware interface according to the configuration information from PXIe bus, and received signal is sent into time-domain digital instrument digital signal processing channel after signal conditioning circuit and A/D change-over circuit; Time-domain digital instrument digital signal processing channel is realized detection trigger, data storage and waveform parameter and is estimated processing, and result is sent into control platform by PXIe bus interface;
B) digitalizer module is when if digitization instrument function:
Port selects circuit to select if digitization instrument input port to receive the signal from down conversion module according to the configuration information from PXIe bus, and received signal is sent into if digitization instrument digital signal processing channel after signal conditioning circuit and A/D change-over circuit; If digitization instrument digital signal processing channel is realized Digital Down Convert, data storage, and result is sent into control platform by PXIe bus interface.
Preferably, described signal generator module comprises AWG (Arbitrary Waveform Generator) port, baseband signal generator I port, baseband signal generator Q port, PXIe bus interface, 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;
C) signal generator module is when AWG (Arbitrary Waveform Generator) function:
PXIe bus interface downloads to by memory management module the Wave data of controlling platform configuration in storage chip; After startup work, waveform engine obtains Wave data from storage chip by memory management module, and one of them passage of directly giving binary channels D/A converter carries out exporting after digital-to-analogue conversion, signal conditioning circuit A carries out range-adjusting 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 synthetic instrument hardware interface by AWG (Arbitrary Waveform Generator) port the most at last;
D) signal generator module is when baseband signal generator function:
PXIe bus interface downloads to by memory management module the Wave data of controlling platform configuration in storage chip, after startup work, waveform engine obtains Wave data from storage chip by memory management module, and give base band signal process engine and carry out interpolation and digital filtering processing, obtain I, Q two ways of digital signals, I, two passages that Q two ways of digital signals is given respectively binary channels D/A converter carry out digital-to-analogue conversion, two signal conditioning circuits carry out range-adjusting and bias operation according to the waveform parameter of configuration to the two paths of signals of binary channels D/A converter output, I the most at last, Q two-way analog signal is sent by baseband signal generator I port and Q port and is exported to up-converter module.
Beneficial effect:
The present invention is based on PXIe framework, designed a kind of integrated instrument that combines signal source and analyzer.Controlling platform is operated under certain function by 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.By PXIe bus, control the platform function of digitalizer module and signal generator module of can also upgrading, thereby met the needs that test macro updates.The present invention also provides the enforcement example of digitalizer module and signal generator module, and the module of its total as much as possible identical function, is conducive to device miniaturization.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention is based on the RF/Microwave integrated instrument of PXIe synthetic instrument framework.
Fig. 2 is the concrete structure schematic diagram of digitalizer module in Fig. 1.
Fig. 3 is the concrete structure schematic diagram of signal generator module in Fig. 1.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.
The embodiment of the present invention provides a kind of RF/Microwave integrated instrument based on PXIe synthetic instrument framework, as shown in Figure 1, this integrated instrument comprises control platform, PXIe system controller, digitalizer module, signal generator module, down conversion module, down-conversion local oscillator, up-converter module, up-conversion local oscillator and synthetic instrument hardware interface.Above-mentioned these building blocks can be arranged in PXIe cabinet, and 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: control platform by PXIe system controller access PXIe bus, digitalizer module, signal generator module, down conversion module, down-conversion local oscillator, up-converter module and up-conversion local oscillator all access PXIe bus, between synthetic instrument hardware interface and digitalizer module and synthetic instrument hardware interface and signal generator module, have holding wire put-through channel; Down conversion module connects down-conversion local oscillator and digitalizer module, and up-converter module connects up-conversion local oscillator and signal generator module; Down conversion module is connected synthetic instrument hardware interface with up-converter module; Synthetic instrument hardware interface transmits or receives from outside signal to outside measurand.
Signal generator module, up-conversion local oscillator, up-converter module form RF/Microwave signal source, can produce random waveform or baseband signal that user arranges.Digitalizer module, down-conversion local oscillator, down conversion module form RF/Microwave analytical instrument, and it can be used as the conventional RF/Microwave instruments such as spectrum analyzer, VSA.Control platform by PXIe bus gating corresponding module, thereby realize this integrated instrument in a kind of function wherein.
Below the function of each building block is described in detail.
PXIe system controller, the data that meet PXIe bus protocol for the information of controlling platform is compiled as are transmitted in PXIe bus, resolve the Data Concurrent obtaining from PXIe bus and give control platform.
Signal generator module is by selected AWG (Arbitrary Waveform Generator) or the baseband signal generator of can be used as.This signal generator module comprises that two signals produce passage, when as Arbitrary Waveform Generator, adopt any one signal to produce passage, according to the configuration information from PXIe bus, produce setting waveform and output to synthetic instrument hardware interface by holding wire put-through channel; When as base band generator, according to the configuration information from PXIe bus, the IQ two paths of signals of two signal generation passage generation quadratures outputs to up-converter module as baseband signal.Firmware that can update signal generator module by PXIe bus, so that upgrading.
Up-converter module, for to coming the baseband signal of automatic signal generator module to carry out up-conversion, then launches by synthetic instrument hardware interface.
Up-conversion local oscillator, is used to up-converter module that local oscillation signal is provided.
Down conversion module, carries out down-conversion for the radiofrequency signal to from synthetic instrument hardware interface, then the intermediate-freuqncy signal obtaining is sent to digitalizer module.
Down-conversion local oscillator, is used to down conversion module that local oscillation signal is provided.
To can be used as time-domain digital instrument be oscilloscope or the if digitization instrument with data processing function to digitalizer module by selected, this digitalizer module carries out respective handling according to the configuration information from PXIe bus to the frequency signal receiving, and then sends to control platform.By PXIe bus, can upgrade the firmware of digitalizer module, so that upgrading.
Control platform, for each module being configured according to selected this integrated instrument function in outside:
(1) elected domain digitizer function: control platform and directly receive low frequency signal from synthetic instrument hardware interface by PXIe bus configuration digitalizer module by holding wire put-through channel, by digitalizer module, low frequency signal is processed, then by PXIe bus, result (Wave data of storage and waveform parameter) is sent to control platform;
(2) when selected if digitization instrument function: control platform and work by PXIe bus starting down-conversion local oscillator and down conversion module, control platform and pass through PXIe bus configuration digitalizer module directly from down conversion module receiving intermediate frequency signal, intermediate-freuqncy signal is processed, then by PXIe bus, result is sent to control platform.
If digitization instrument function can also be embodied as radio frequency spectrometer function, VSA function and other if digitization instrument functions.Specifically:
● when selected radio frequency spectrometer function:
Control platform and work by PXIe bus starting down-conversion local oscillator and down conversion module, local frequency circulation change within the scope of of configuration down-conversion local oscillator, thus realize frequency sweep function; Down conversion module has a plurality of IF-FRE IF, the corresponding bandwidth of each IF, and the IF of control platform configuration down conversion module, makes the signal of exporting to digitalizer module in required bandwidth; Control platform and pass through PXIe bus configuration digitalizer module directly from down conversion module receiving intermediate frequency signal, by digitalizer module, intermediate-freuqncy signal is gathered and stored, then by PXIe bus, the Wave data of storage and waveform parameter are sent to control platform, control platform and complete spectrum analysis process.
● when selected VSA function:
Control platform and work by PXIe bus starting down-conversion local oscillator and down conversion module, the local frequency of configuration down-conversion local oscillator is fixed on default point frequently, and the IF of configuration down conversion module, makes the signal of exporting to digitalizer module in required bandwidth; Control platform configuration digitalizer module directly from down conversion module receiving intermediate frequency signal, by digitalizer module, intermediate-freuqncy signal is carried out to Digital Down Convert, obtain I, Q component sends to control platform by PXIe bus, control platform and complete Vector Signal Analysis function.
(3) when selected Arbitrary Waveform Generator function: control platform and be switched to AWG (Arbitrary Waveform Generator) function by PXIe bus starting signal generator module, and the waveform of generation is sent via synthetic instrument hardware interface by holding wire put-through channel.
(4) when selected radio-frequency signal source function: control platform and be switched to baseband signal generator function by PXIe bus starting signal generator module, and start and configuration up-converter module and up-conversion local oscillator module, baseband signal generator sends to up-converter module by the two-way IQ two paths of signals of generation.
Preferentially, when integrated instrument processing frequency is higher, this integrated instrument may further include first line switch, and this preselector is programmable filter.First line switch is connected with down conversion module and accesses PXIe bus, the first line switch radiofrequency signal that filtering is inputted from synthetic instrument hardware interface before down conversion module; Control platform and participate in or do not participate in radiofrequency signal filtering processing by PXIe bus configuration first line switch, and participate in the centre frequency under filtering disposition.
Equally, this integrated instrument can further include second preselector, and this preselector is programmable filter.Second preselector is connected with up-converter module and accesses PXIe bus, and second preselector carries out filtering to the radiofrequency signal of up-converter module output; Control platform and participate in or do not participate in radiofrequency signal filtering processing by PXIe bus configuration second preselector, and participate in the centre frequency under filtering disposition.
Visible, the present invention is based on PXIe framework, designed a kind of integrated instrument that combines signal source and analyzer.Controlling platform is operated under certain function by 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.By PXIe bus, control the platform function of digitalizer module and signal generator module of can also upgrading, thereby met the needs that test macro updates.
Fig. 2 is the concrete structure schematic diagram of digitalizer module in the present embodiment.As shown in Figure 2, digitalizer module has two input ports, be respectively if digitization instrument input port and time-domain digital instrument input port, if digitization instrument input port connects down conversion module, and time-domain digital instrument input port connects synthetic instrument hardware interface.Digitalizer module also comprises port selection circuit, signal conditioning circuit, A/D change-over circuit and digital processing element.Digital processing element comprises if digitization instrument digital signal processing channel, time-domain digital instrument digital signal processing channel and PXIe bus interface.
A) when time-domain digital instrument function, port selects circuit according to the configuration information from PXIe bus, to select the signal of time-domain digital instrument input port, received signal is sent into time-domain digital instrument digital signal processing channel after signal conditioning circuit and A/D change-over circuit, time-domain digital instrument digital signal processing channel is mainly realized detection trigger, data storage and waveform parameter and is estimated processing, and result is sent into control platform by PXIe bus interface.
B) when if digitization instrument function, port selects circuit according to the configuration information from PXIe bus, to select the signal of if digitization instrument input port, received signal is sent into if digitization instrument digital signal processing channel after signal conditioning circuit and A/D change-over circuit, if digitization instrument digital signal processing channel is mainly realized Digital Down Convert and data storage, and result is sent into control platform by PXIe bus interface.
Above mention, if digitization instrument function is specifically divided into radio frequency spectrometer function and VSA function.When selected radio frequency spectrometer function, if digitization instrument digital signal processing channel completes intermediate-freuqncy signal and gathers and store, and then by PXIe bus, the Wave data of storage is sent to control platform; When selected VSA function, if digitization instrument digital signal processing channel carries out Digital Down Convert to intermediate-freuqncy signal, obtains I, Q component sends to control platform by PXIe bus.
This digital processing element can be realized by fpga chip or fpga chip+dsp chip.
Fig. 3 is the concrete structure schematic diagram of signal generator module in the present embodiment.As shown in Figure 3, this signal generator module has three output ports, is respectively AWG (Arbitrary Waveform Generator) output port, baseband signal generator I port and baseband signal generator Q port.Signal generator module also comprises PXIe bus interface, 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 (Arbitrary Waveform Generator) signal and baseband signal generator I branch road are shared same signal conditioning circuit A, two signal conditioning circuit A, B connect respectively the A of binary channels D/A converter, the output of two passages of B, the input of binary channels D/A converter A channel connects 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.
C), when AWG (Arbitrary Waveform Generator) function, PXIe bus interface downloads to by memory management module the Wave data (can be normalization Wave data) of controlling platform configuration in storage chip here.After startup work, waveform engine obtains Wave data from storage chip by memory management module, and directly give the A channel of binary channels D/A converter, signal conditioning circuit A carries out range-adjusting (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 obtaining the most at last is delivered to AWG (Arbitrary Waveform Generator) port.
D) when baseband signal generator function, PXIe bus interface downloads to by memory management module the Wave data of controlling platform configuration in storage chip, after startup work, waveform engine obtains Wave data from storage chip by memory management module, and give base band signal process engine and carry out interpolation and digital filtering processing, obtain I, Q two ways of digital signals, I, two passages that Q two ways of digital signals is given respectively binary channels D/A converter carry out digital-to-analogue conversion, two signal conditioning circuits carry out range-adjusting according to the waveform parameter of configuration to the two paths of signals of binary channels D/A converter output and (amplify, decay) and bias operation, I the most at last, Q two-way analog signal is delivered to I port and the Q port of baseband signal generator.
Structure shown in Fig. 2 and Fig. 3 is shared module at utmost, is conducive to miniaturization.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. radio frequency and the microwave integrated instrument based on PXIe synthetic instrument framework, it is characterized in that, this integrated instrument comprises controls platform, PXIe system controller, digitalizer module, signal generator module, down conversion module, down-conversion local oscillator, up-converter module, up-conversion local oscillator and synthetic instrument hardware interface;
Control platform by PXIe system controller access PXIe bus, digitalizer module, signal generator module, down conversion module, down-conversion local oscillator, up-converter module and up-conversion local oscillator all access PXIe bus, between synthetic instrument hardware interface and digitalizer module and synthetic instrument hardware interface and signal generator module, have holding wire put-through channel; Down conversion module connects down-conversion local oscillator and digitalizer module, and up-converter module connects up-conversion local oscillator and signal generator module; Down conversion module is connected synthetic instrument hardware interface with up-converter module;
PXIe system controller, the data that meet PXIe bus protocol for the information of controlling platform is compiled as are transmitted in PXIe bus, resolve the Data Concurrent obtaining from PXIe bus and give control platform;
Signal generator module is by selecting as AWG (Arbitrary Waveform Generator) or baseband signal generator; This signal generator module comprises that two signals produce passage, when as Arbitrary Waveform Generator, adopt any one signal to produce passage, according to the configuration information from PXIe bus, produce waveform signal and output to synthetic instrument hardware interface by holding wire put-through channel; When as base band generator, according to the configuration information from PXIe bus, the IQ two paths of signals of two signal generation passage generation quadratures outputs to up-converter module as baseband signal;
Up-converter module, for to coming the baseband signal of automatic signal generator module to carry out up-conversion, then launches by synthetic instrument hardware interface;
Up-conversion local oscillator, is used to up-converter module that local oscillation signal is provided;
Down conversion module, carries out down-conversion for the radiofrequency signal to from synthetic instrument hardware interface, then the intermediate-freuqncy signal obtaining is sent to digitalizer module;
Down-conversion local oscillator, is used to down conversion module that local oscillation signal is provided;
Digitalizer module is by selected as time-domain digital instrument or if digitization instrument, and this digitalizer module, according to the frequency signal receiving being selected to processing corresponding to function from the configuration information of PXIe bus, then sends to control platform;
Control platform, for carrying out the configuration of each module according to selected this integrated instrument function in outside:
Elected domain digitizer function: control platform and directly receive low frequency signal from synthetic instrument hardware interface by PXIe bus configuration digitalizer module by holding wire put-through channel, by digitalizer module, low frequency signal is processed, then by PXIe bus, result is sent to control platform;
When selected if digitization instrument function: control platform by PXIe bus starting and configure down-conversion local oscillator and down conversion module, configuration digitalizer module is directly from down conversion module receiving intermediate frequency signal, intermediate-freuqncy signal is processed, then by PXIe bus, result is sent to control platform;
When selected Arbitrary Waveform Generator function: control platform and be switched to AWG (Arbitrary Waveform Generator) function by PXIe bus starting signal generator module, and the waveform of generation is sent to synthetic instrument hardware interface by holding wire put-through channel;
When selected radio-frequency signal source function: control platform and be switched to baseband signal generator function by PXIe bus starting signal generator module, and start and configuration up-converter module and up-conversion local oscillator module, baseband signal generator sends to up-converter module by the two-way IQ two paths of signals of generation;
If digitization instrument function comprises radio frequency spectrometer function; Described control platform is further used for:
When selected described digitalizer module is during in radio frequency spectrometer function, control platform and work by PXIe bus starting down-conversion local oscillator and down conversion module, local frequency circulation change within the scope of of configuration down-conversion local oscillator, thus realize frequency sweep function; Down conversion module has a plurality of IF-FRE IF, the corresponding bandwidth of each IF, and the IF of control platform configuration down conversion module, makes the signal of exporting to digitalizer module in required bandwidth; Control platform and pass through PXIe bus configuration digitalizer module directly from down conversion module receiving intermediate frequency signal, by digitalizer module, intermediate-freuqncy signal is gathered and stored, then by PXIe bus, the Wave data of storage is sent to control platform, by controlling platform, complete spectrum analysis process;
If digitization instrument function comprises VSA function; Described control platform is further used for:
When selected described digitalizer module is during in VSA function, controlling platform works by PXIe bus starting down-conversion local oscillator and down conversion module, the local frequency of configuration down-conversion local oscillator is fixed on default point frequently, the IF of configuration down conversion module, makes the signal of exporting to digitalizer module in required bandwidth; Control platform configuration digitalizer module directly from down conversion module receiving intermediate frequency signal, by digitalizer module, intermediate-freuqncy signal is carried out to Digital Down Convert, obtain I, Q component sends to control platform by PXIe bus, by controlling platform, completes Vector Signal Analysis function;
Described digitalizer module comprises if digitization instrument input port, time-domain digital instrument input port, port selection circuit, signal conditioning circuit, A/D change-over circuit and digital processing element; Described digital processing element comprises if digitization instrument digital signal processing channel, time-domain digital instrument digital signal processing channel and PXIe bus interface;
A) digitalizer module is when time-domain digital instrument function:
Port selects circuit to select time-domain digital instrument input port to receive the signal from synthetic instrument hardware interface according to the configuration information from PXIe bus, and received signal is sent into time-domain digital instrument digital signal processing channel after signal conditioning circuit and A/D change-over circuit; Time-domain digital instrument digital signal processing channel is realized detection trigger, data storage and waveform parameter and is estimated processing, and result is sent into control platform by PXIe bus interface;
B) digitalizer module is when if digitization instrument function:
Port selects circuit to select if digitization instrument input port to receive the signal from down conversion module according to the configuration information from PXIe bus, and received signal is sent into if digitization instrument digital signal processing channel after signal conditioning circuit and A/D change-over circuit; If digitization instrument digital signal processing channel is realized Digital Down Convert, data storage, and result is sent into control platform by PXIe bus interface;
Described signal generator module comprises AWG (Arbitrary Waveform Generator) port, baseband signal generator I port, baseband signal generator Q port, PXIe bus interface, 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;
C) signal generator module is when AWG (Arbitrary Waveform Generator) function:
PXIe bus interface downloads to by memory management module the Wave data of controlling platform configuration in storage chip; After startup work, waveform engine obtains Wave data from storage chip by memory management module, and one of them passage of directly giving binary channels D/A converter carries out exporting after digital-to-analogue conversion, signal conditioning circuit A carries out range-adjusting 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 synthetic instrument hardware interface by AWG (Arbitrary Waveform Generator) port the most at last;
D) signal generator module is when baseband signal generator function:
PXIe bus interface downloads to by memory management module the Wave data of controlling platform configuration in storage chip, after startup work, waveform engine obtains Wave data from storage chip by memory management module, and give base band signal process engine and carry out interpolation and digital filtering processing, obtain I, Q two ways of digital signals, I, two passages that Q two ways of digital signals is given respectively binary channels D/A converter carry out digital-to-analogue conversion, two signal conditioning circuits carry out range-adjusting and bias operation according to the waveform parameter of configuration to the two paths of signals of binary channels D/A converter output, I the most at last, Q two-way analog signal is sent by baseband signal generator I port and Q port and is exported to up-converter module.
2. integrated instrument as claimed in claim 1, is characterized in that, this integrated instrument further comprises first line switch;
First line switch is connected with down conversion module and accesses PXIe bus, the radiofrequency signal of first line switch filtering input before down conversion module; Control platform and participate in or do not participate in radiofrequency signal filtering processing by PXIe bus configuration first line switch, and participate in the centre frequency under filtering disposition.
3. integrated instrument as claimed in claim 1, is characterized in that, this integrated instrument further comprises second preselector;
Second preselector is connected with up-converter module and accesses PXIe bus, and second preselector carries out filtering to the radiofrequency signal of up-converter module output; Control platform and participate in or do not participate in radiofrequency signal filtering processing by PXIe bus configuration second preselector, and participate in the centre frequency under filtering disposition.
4. integrated instrument as claimed in claim 1, is characterized in that, described control platform is further used for, and upgrades the firmware of digitalizer module and signal generator module by PXIe bus.
5. integrated instrument as claimed in claim 1, is characterized in that, described PXIe system controller adopts PXIe embedded system controller or PXIe external hanging type system controller.
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| CN201110392303.9A CN102497237B (en) | 2011-12-01 | 2011-12-01 | Radio frequency and microwave synthetic instrument based on PXIe (PCI Extensions for Instrumentation) synthetic instrument architecture |
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