CN110971486A - Switch matrix control device and method for integrated multiport network instrument - Google Patents
Switch matrix control device and method for integrated multiport network instrument Download PDFInfo
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- CN110971486A CN110971486A CN201911145073.9A CN201911145073A CN110971486A CN 110971486 A CN110971486 A CN 110971486A CN 201911145073 A CN201911145073 A CN 201911145073A CN 110971486 A CN110971486 A CN 110971486A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
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Abstract
The invention discloses a switch matrix control device and a method of an integrated multiport network instrument, wherein the device comprises a main controller unit, a signal processor unit, a slave controller unit, a switch matrix unit, a storage unit and a signal acquisition unit, wherein the main controller unit is respectively connected with the signal processor unit and the storage unit; the signal processor unit is respectively connected with the slave controller unit and the signal acquisition unit; the slave controller unit is connected with the switch matrix unit. The switches of the switch matrix unit are electronic switches, and the electronic switches have longer service life than mechanical switches. The control command of the invention is initiated by the main controller unit, is analyzed and forwarded by the signal processor unit, and then is decoded and executed by the slave controller unit, thereby finally realizing the flexible switching and configuration of the electronic switch in the switch matrix unit, obviously shortening the signal transmission path of the network instrument, further reducing the insertion loss caused by semi-rigid cables and the like in the signal path, and improving the dynamic range of the system.
Description
Technical Field
The invention relates to the field of multiport network parameter testers, in particular to a switch matrix control device and method of an integrated multiport network tester.
Background
With the rapid increase of the number of channels and ports of the rf microwave device, the testing requirement of the multi-port device under test is increasingly urgent, and meanwhile, the multi-channel differential network transmission test for digital transmission equipment such as a high-speed backplane, a PCB, a connector, and the like is also a hot spot in the industry. The multi-port network parameter tester can well solve the test problem, test objects of the multi-port network parameter tester comprise a high-speed digital interconnection component, a high-speed digital integrated circuit package, a high-speed back plate, a multi-port microwave network and the like, multi-port tests, multi-channel differential network transmission tests and other solutions can be provided for satellite communication and aerospace measurement and control equipment, and test analysis means can be provided for 5G equipment manufacturers and high-speed PCB manufacturers.
The construction scheme of the multi-port network parameter tester can be divided into two schemes, one is a split scheme based on a vector network analyzer and a switch matrix, and the other is an integrated multi-port network parameter tester scheme. The switch matrix in the split type scheme adopts mechanical switches mostly, the service life is short, and in addition, a longer semi-rigid cable is needed to be used for connecting the network instrument and the switch matrix, the signal transmission path is long, the insertion loss is large, and the dynamic range of the whole machine is low. Manufacturers currently available for providing such a split multi-port network parameter tester include the German technology company, the America's Anli company, and the domestic Central electric appliances and meters Inc. The construction of an integrated multi-port network parameter tester is a development trend of multi-port device testing solutions.
Disclosure of Invention
Aiming at the problems of short service life, long signal transmission path and large insertion loss in the prior art, the invention provides an integrated switch matrix control device of a multiport network instrument.
The invention adopts the following technical scheme:
an integrated switch matrix control device of a multiport network instrument comprises a main controller unit, a signal processor unit, a slave controller unit, a switch matrix unit, a storage unit and a signal acquisition unit, wherein the main controller unit is respectively connected with the signal processor unit and the storage unit; the signal processor unit is respectively connected with the slave controller unit and the signal acquisition unit; the slave controller unit is connected with the switch matrix unit.
Preferably, the main controller unit can control the switching action of the switches in the switch matrix unit according to the test content set by the user, and can perform deep processing on the data processed by the signal processing unit;
the storage unit stores data calculation results and control parameters of the main controller unit.
Preferably, the signal acquisition unit amplifies, filters, conditions and samples the analog intermediate frequency signal to obtain a digitized intermediate frequency signal and sends the digitized intermediate frequency signal to the signal processor unit;
the signal processor unit performs digital signal processing on the digitized intermediate frequency signal, including serial-parallel conversion, down conversion, CIC extraction and FIR filtering, and sends the filtering result to the main controller unit;
the signal processor unit analyzes the control command sent by the master controller unit and forwards the analyzed control command to the slave controller unit.
Preferably, the slave controller unit can receive and decode the control command sent by the signal processor unit, and control the switch matrix unit according to the parameter obtained by decoding;
preferably, the switch matrix unit comprises a plurality of single-pole four-throw switches, and the single-pole four-throw switches can realize the configuration and switching of the signal source channel and the receiver channel.
The invention also provides a control method of the switch matrix control device of the integrated multiport network instrument.
The invention has the beneficial effects that:
the switches of the switch matrix unit are electronic switches, and the electronic switches have longer service life than mechanical switches, so that the use cost of users is reduced. The control command of the invention is initiated by the main controller unit, is analyzed and forwarded by the signal processor unit, and then is decoded and executed by the slave controller unit, thereby finally realizing the flexible switching and configuration of the electronic switch in the switch matrix unit, obviously shortening the signal transmission path of the network instrument, further reducing the insertion loss caused by semi-rigid cables and the like in the signal path, and improving the dynamic range of the system.
Drawings
Fig. 1 is a schematic diagram of an integrated switch matrix control device of a multiport network instrument.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
example 1
Referring to fig. 1, an integrated switch matrix control device for a multiport network instrument includes a master controller unit, a signal processor unit, a slave controller unit, a switch matrix unit, a storage unit and a signal acquisition unit.
The main controller unit is respectively connected with the signal processor unit and the storage unit.
The signal processor unit is respectively connected with the slave controller unit and the signal acquisition unit.
The slave controller unit is connected with the switch matrix unit.
The master controller unit is a Digital Signal Processor (DSP), the signal processor unit and the slave controller unit are built based on a Field Programmable Gate Array (FPGA), and the storage unit is a DDR3 storage.
The main controller unit sends control commands and parameters to the signal processor unit through an EMIF bus, and the signal processor unit sends data to the main controller unit through an SRIO bus.
The main controller unit can control the switching action of the switches in the switch matrix unit according to the test content set by the user, and can perform deep processing on the data processed by the signal processing unit.
The storage unit stores data calculation results and control parameters of the main controller unit.
The signal acquisition unit amplifies, filters, conditions and samples the analog intermediate frequency signal to obtain a digitized intermediate frequency signal and sends the digitized intermediate frequency signal to the signal processor unit.
The signal processor unit performs digital signal processing including serial-to-parallel conversion, down conversion, CIC decimation, FIR filtering, etc. on the digitized intermediate frequency signal, and sends the filtering result to the main controller unit.
The signal processor unit analyzes the control command sent by the master controller unit and forwards the analyzed control command to the slave controller unit.
The slave controller unit can receive the control command sent by the signal processor unit, decode the control command and control the switch matrix unit according to the parameters obtained by decoding.
The switch matrix unit comprises a plurality of single-pole four-throw switches, the single-pole four-throw switches are electronic switches, and the single-pole four-throw switches can realize the configuration and switching of a signal source channel and a receiver channel, so that the test purpose of a user is realized.
Example 2
A control method using the switch matrix control device of the integrated multiport network instrument of embodiment 1, comprising the steps of:
step 1: and the power is supplied to the main controller unit, the signal processor unit, the sub-controller unit, the switch matrix unit, the storage unit and the signal acquisition unit, and all the units complete initialization.
Step 2: the main controller unit creates corresponding work tasks according to the test contents set by the user, and then sends control commands and parameters to the signal processor unit.
The specific process is as follows: the main controller unit creates a corresponding work task according to the test content set by the user, encodes the control command and the control parameter related to the work task, and then sends the encoded control command and the encoded control parameter to the signal processor unit through the EMIF bus.
And step 3: the signal processor unit analyzes the control command and the parameters and forwards the control command and the parameters to the slave controller unit;
meanwhile, the signal processor unit carries out digital signal processing on the sampling data of the signal acquisition unit, sends the processing result to the main controller unit for deep processing, and stores the result of the deep processing in the storage unit.
The specific process of the step 3 is as follows:
the signal processor unit forwards the analyzed control command and parameters to the slave controller unit through a local custom bus;
the signal acquisition unit amplifies the analog intermediate frequency signal to improve the signal-to-noise ratio of the analog intermediate frequency signal;
then, filtering out high-frequency components in the intermediate-frequency signals by using an anti-aliasing filter to prevent frequency spectrum aliasing;
and finally, sampling the intermediate frequency signal by using an analog-to-digital converter, and sending the sampled signal to a signal processor unit.
The signal processing unit receives the sampling signal sent by the signal acquisition unit, performs digital signal processing on the sampling signal, including serial-parallel conversion, down conversion, CIC extraction, FIR filtering and the like, and sends the processing result to the main controller unit through the SRIO bus.
And 4, step 4: the slave controller unit decodes the control command and the parameters, and sends the command and the parameters obtained by decoding to the switch matrix unit so as to control the switch matrix unit;
and 5: the switch matrix unit switches the signal source channel and the receiver channel.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (8)
1. An integrated switch matrix control device of a multiport network instrument is characterized by comprising a main controller unit, a signal processor unit, a slave controller unit, a switch matrix unit, a storage unit and a signal acquisition unit, wherein the main controller unit is respectively connected with the signal processor unit and the storage unit; the signal processor unit is respectively connected with the slave controller unit and the signal acquisition unit; the slave controller unit is connected with the switch matrix unit.
2. The switch matrix control device of the integrated multiport network instrument according to claim 1, wherein the main controller unit can control the switching action of the switches in the switch matrix unit according to the test content set by a user, and can perform deep processing on the data processed by the signal processing unit;
the storage unit stores data calculation results and control parameters of the main controller unit.
3. The switch matrix control device of the integrated multiport network instrument according to claim 1, wherein the signal acquisition unit amplifies, filters, conditions and samples the analog intermediate frequency signal to obtain a digitized intermediate frequency signal and sends the digitized intermediate frequency signal to the signal processor unit;
the signal processor unit performs digital signal processing on the digitized intermediate frequency signal, including serial-parallel conversion, down conversion, CIC extraction and FIR filtering, and sends the filtering result to the main controller unit;
the signal processor unit analyzes the control command sent by the master controller unit and forwards the analyzed control command to the slave controller unit.
4. The switch matrix control device of claim 1, wherein the slave controller unit is capable of receiving and decoding control commands from the signal processor unit, and controlling the switch matrix unit according to decoded parameters.
5. The switch matrix control device of claim 1, wherein the switch matrix unit comprises a plurality of single-pole four-throw switches, and the single-pole four-throw switches can configure and switch the signal source channel and the receiver channel.
6. A control method using the switch matrix control device of the integrated multiport network instrument according to any one of claims 1 to 5, characterized by comprising the following steps:
step 1: the power supply unit supplies power to the master controller unit, the signal processor unit, the slave controller unit, the switch matrix unit, the storage unit and the signal acquisition unit, and all the units complete initialization;
step 2: the main controller unit creates a corresponding work task according to the test content set by the user and then sends a control command and parameters to the signal processor unit;
and step 3: the signal processor unit analyzes the control command and the parameters and forwards the control command and the parameters to the slave controller unit;
meanwhile, the signal processor unit performs digital signal processing on the sampling data of the signal acquisition unit, sends a processing result to the main controller unit for deep processing, and stores the result of the deep processing in the storage unit;
and 4, step 4: the slave controller unit decodes the control command and the parameters, and sends the command and the parameters obtained by decoding to the switch matrix unit so as to control the switch matrix unit;
and 5: the switch matrix unit switches the signal source channel and the receiver channel.
7. The control method of the switch matrix control device of the integrated multiport network instrument according to claim 6, wherein the specific process of the step 2 is as follows: the main controller unit creates a corresponding work task according to the test content set by the user, encodes the control command and the control parameter related to the work task, and then sends the encoded control command and the encoded control parameter to the signal processor unit through the EMIF bus.
8. The control method of the switch matrix control device of the integrated multiport network instrument according to claim 6, wherein the specific process of the step 3 is as follows:
the signal processor unit forwards the analyzed control command and parameters to the slave controller unit through a local custom bus;
the signal acquisition unit amplifies the analog intermediate frequency signal to improve the signal-to-noise ratio of the analog intermediate frequency signal; then, filtering out high-frequency components in the intermediate-frequency signals by using an anti-aliasing filter to prevent frequency spectrum aliasing; finally, sampling the intermediate frequency signal by using an analog-to-digital converter, and sending the sampled signal to a signal processor unit;
the signal processing unit receives the sampling signal sent by the signal acquisition unit, performs digital signal processing on the sampling signal, including serial-parallel conversion, down conversion, CIC extraction and FIR filtering, and sends the processing result to the main controller unit through the SRIO bus.
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