Vector signal comprehensive test module

Abstract

The utility model discloses a vector signal comprehensive test module, which consists of an internal reference clock and a VCO (Voltage Controlled Oscillator), and the reference clock has an internal and external switching function. The VCO adopts a multi-output phase adjustable device and provides local oscillation signals for the two RFICs and the six frequency conversion circuits respectively. The two RFICs are connected in parallel, and an external coherent local oscillator is provided by the VOC, so that the coherence of the two RFICs is realized. The microwave frequency conversion circuit realizes the frequency expansion function of the RFIC, expands two-path emission frequency and four-path reception frequency from tens of MHz to 9KHz, has four radio frequency test functions of vector signal generation, vector signal analysis, vector network analysis and vector transceiver, and realizes the multifunctional and multi-scene application capability of the comprehensive test instrument.

Description

Technical Field

[0001] The utility model relates to the field of microwave comprehensive testing, in particular to a vector signal comprehensive testing module. Background Art

[0002] Microwave comprehensive tester is an important test equipment in the RF microwave test industry, especially in the front-line field test application. The multifunctional microwave comprehensive tester is a powerful assistant for outdoor field testing. Versatility and portability are important features of microwave comprehensive tester. In modern RF microwave systems, the test of vector modulation signals is becoming more and more important. Therefore, microwave comprehensive tester with vector signal test function has a wider application prospect than traditional microwave comprehensive tester.

[0003] The handheld microwave comprehensive tester is an important RF microwave test tool for field testing. The handheld microwave comprehensive tester is small in size and light in weight, which is very convenient for field use. However, the traditional handheld comprehensive tester is mainly based on the architecture of the handheld vector network, and adds a spectrum analyzer function to the receiving channel, which has three functions: signal source, spectrum analyzer, and vector network analyzer. However, since its signal source part adopts the phase-locked loop + frequency multiplication solution, it can only output simple continuous wave signals and cannot send signals with complex modulation patterns.

[0004] Therefore, the patent of the present invention provides a vector signal comprehensive test module. Utility Model Content

[0005] The utility model proposes a vector signal comprehensive test module to solve the defects of the prior art mentioned above.

[0006] The module circuit consists of an internal reference clock and a VCO. The reference clock has internal and external switching functions. The VCO uses a multi-output phase-adjustable device to provide local oscillator signals for two RFICs and 6-channel frequency conversion circuits.

[0007] The RFIC uses two chips in parallel, and the VOC provides an external coherent local oscillator for the coherence of the two RFICs; the microwave frequency conversion circuit completes the frequency extension function of the RFIC, extending the 2-channel transmission and 4-channel reception frequencies from tens of MHz down to 9KHz.

[0008] The trigger input circuit connects the external trigger signal to the PL end of the zynq system, and the trigger output circuit outputs the trigger signal generated by the zynq PL end. It has a level conversion function, so that the trigger input and output can adapt to the wide range of 3.3V-12V TTL signals.

[0009] The modulation input / output circuit uses a 16-bit AD / DA chip to collect the input analog modulation signal and transmit it to the zynq PL end, and output the analog modulation signal generated by the PL end.

[0010] The Zynq chip completes the AD data reception and transmission of the RFIC, and completes the control and monitoring of the RFIC and frequency conversion circuit, modulation and trigger circuit, and interface board circuit. The PS end of Zynq runs the comprehensive tester software to complete general spectrum analysis, vector signal analysis, real-time signal analysis, vector signal generation, arbitrary wave signal generation and playback, vector network analysis, vector signal coherent transmission and reception and other functions, and runs the comprehensive tester remote control server, and other hosts have remote control test functions for this module.

[0011] The PXIe to TCP / IP circuit completes the protocol conversion, converts the PCIe protocol of the PXIe backplane to the TCP / IP protocol and then connects to the Zynq PS end LAN port, and the PXIe master is connected to the Ethernet of the PS end.

[0012] The vector transceiver module panel has 6 coaxial interfaces, which are connected to the 6 coaxial interfaces of the interface board to complete the signal connection of dual-transmit and four-receive channels.

[0013] Beneficial effects:

[0014] In response to the above-mentioned problems, this utility model patent is designed to provide a vector signal comprehensive test module, which has four major RF test functions: vector signal generation, vector signal analysis, vector network analysis, and vector transceiver, realizing the multi-functional and multi-scenario application capability of the comprehensive tester. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate the embodiments and are used together with the description to explain the principles of the utility model. It will be easy to recognize other embodiments and many expected advantages of the embodiments because they become better understood by reference to the following detailed description. Other features, objects and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments made with reference to the following drawings:

[0016] Figure 1 It is a module design drawing of the utility model. DETAILED DESCRIPTION

[0017] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the relevant utility model are shown in the accompanying drawings.

[0018] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0019] According to a vector signal comprehensive test module of an embodiment of the utility model, the comprehensive tester of this scheme is based on the vector transceiver architecture and adopts PXIe modular design. Its principle block diagram is as follows Figure 1 As shown, this solution has the following multiple testing functions:

[0020] PortA and PortB serve as the test terminals of the full dual-port vector network and complete the test function of the full dual-port vector network.

[0021] PortA, under the power regulation of the power amplifier and frequency conversion module, completes the function of a large dynamic and high-power vector signal generator;

[0022] PortB, under the control of the switch and low noise amplifier, completes the test function of the vector signal analyzer with preamplifier switch;

[0023] When PortA and PortB are configured as transmit and receive states respectively, the vector signal transceiver test function of 1T1R is completed;

[0024] After removing the connecting cables of T1, T1, R1A, R1B, R2A and R2B on the panel of the vector transceiver module, the vector transceiver module can function independently as a 2T4R vector transceiver tester.

[0025] The vector signal tester consists of a single-slot PXIe vector signal transceiver module and a single-slot PXIe interface module.

[0026] The vector signal transceiver module is composed of RFIC, local oscillator circuit, microwave frequency conversion circuit, Zynq-based control and processing circuit, PXIe to TCP / IP circuit, trigger and modulation circuit. The interface module is composed of two dual directional couplers, single-arm RF power amplifier circuit, single-arm low-noise amplifier circuit and switch.

[0027] The module circuit is composed of an internal reference clock and a VCO. The reference clock has an internal and external switching function. The VCO uses a multi-output phase-adjustable device to provide local oscillator signals for two RFICs and 6-way frequency conversion circuits.

[0028] The RFIC adopts the method of connecting two pieces in parallel, and VOC provides the external coherent local oscillator to achieve the coherence of the two RFICs.

[0029] The microwave frequency conversion circuit realizes the frequency extension function of RFIC, extending the 2-way transmission and 4-way reception frequencies from tens of MHz down to 9KHz.

[0030] The trigger input circuit connects the external trigger signal to the PL end of the zynq system, and the trigger output circuit outputs the trigger signal generated by the zynq PL end. It has a level conversion function, so that the trigger input and output can adapt to the wide range TTL signal of 3.3V~12V.

[0031] The modulation input / output circuit uses a 16-bit AD / DA chip to collect the input analog modulation signal and transmit it to the zynq PL end, and output the analog modulation signal generated by the PL end.

[0032] The Zynq chip realizes the AD data reception and transmission of RFIC, and realizes the control and monitoring of RFIC and frequency conversion circuit, modulation and trigger circuit, and interface board circuit. The PS end of Zynq runs the comprehensive tester software to realize functions such as general spectrum analysis, vector signal analysis, real-time signal analysis, vector signal generation, arbitrary wave signal generation and playback, vector network analysis, and vector signal coherent transmission and reception, and runs the comprehensive tester remote control server, and other hosts have remote control test functions for this module.

[0033] The PXIe to TCP / IP circuit implements protocol conversion, converts the PCIe protocol of the PXIe backplane to the TCP / IP protocol and then connects to the Zynq PS end LAN port, and the PXIe master is connected to the Ethernet of the PS end.

[0034] The vector transceiver module panel has 6 coaxial interfaces, which are connected to the 6 coaxial interfaces of the interface board to realize the signal connection of dual-transmit and four-receive channels.

[0035] The interface board features two dual directional couplers to achieve signal separation for vector network analysis.

[0036] The A port is connected to an RF switch, which connects the signal to the dual directional coupler or low noise amplifier LAN of the A branch. When connected to the dual directional coupler, the A port function of the network analysis or the spectrum analyzer without preamplifier mode is realized, and when connected to the LAN, the spectrum analyzer preamplifier mode is realized.

[0037] A programmable power amplifier circuit is placed in the signal output branch of port B to achieve high-power output in signal source mode and control of source signal in vector network mode.

[0038] An interconnected power supply and control interface is provided between the vector transceiver module and the interface board module, and the vector transceiver module provides power supply and control signals for the interface board.

[0039] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood by specific circumstances.

[0040] Although the embodiments of the present invention have been shown and described, it is understandable to those skilled in the art that various equivalent changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vector signal comprehensive test module, characterized in that: The module circuit consists of an internal reference clock and a VCO. The reference clock has internal and external switching functions. The VCO uses a multi-output phase-adjustable device to provide local oscillator signals for two RFICs and 6-channel frequency conversion circuits.

2. A vector signal comprehensive test module according to claim 1, characterized in that: The RFIC uses two chips in parallel, and the VOC provides an external coherent local oscillator for the coherence of the two RFICs; the microwave frequency conversion circuit completes the frequency extension function of the RFIC, extending the 2-channel transmission and 4-channel reception frequencies from tens of MHz down to 9KHz.

3. A vector signal comprehensive test module according to claim 1, characterized in that: The trigger input circuit connects the external trigger signal to the PL end of the zynq system, and the trigger output circuit outputs the trigger signal generated by the PL end of the zynq.

4. A vector signal comprehensive test module according to claim 1, characterized in that: The modulation input / output circuit uses a 16-bit AD / DA chip to collect the input analog modulation signal and transmit it to the zynq PL end, and output the analog modulation signal generated by the PL end.

5. A vector signal comprehensive test module according to claim 1, characterized in that: The Zynq chip completes the AD data reception and transmission of the RFIC, and completes the control and monitoring of the RFIC and the frequency conversion circuit, modulation and trigger circuit, and interface board circuit.

6. A vector signal comprehensive test module according to claim 1, characterized in that: The PXIe to TCP / IP circuit completes the protocol conversion, converts the PCIe protocol of the PXIe backplane to the TCP / IP protocol and then connects to the Zynq PS end LAN port, and the PXIe master is connected to the Ethernet of the PS end.

7. A vector signal comprehensive test module according to claim 1, characterized in that: The vector transceiver module panel has 6 coaxial interfaces, which are connected to the 6 coaxial interfaces of the interface board to complete the signal connection of dual-transmit and four-receive channels.

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