Dual-mode signal acquiring board

Abstract

The invention relates to a dual-mode signal acquiring board, belonging to the technical field of data acquisition. The acquiring board comprises a power supply module, a clock module, a power divider module, an ADC module, a multiplex allocation module, a data preprocessing module, a data caching module, a control interface module and a main control module, and can implement the functions of dual-mode data acquisition, multiple-triggering mode control, data caching, data preprocessing and data transmission, the invention solves the problems that the interchannel synchronization under GSPS data acquisition velocity, multiple-triggering mode control, data preprocessing and transmitting, data caching clock network distribution are not easy to implement, the invention also solves the technical problem for implementing the interweave sampling of ADC chip of two GSPS sampling rates, the invention is suitable for the data acquisition conditions with high sampling velocity and input bandwidth requirement being applied to SAR radar echo signal acquisition, radar signal spying receiving, frequency storing interference and software radio and so on.

Description

technical field [0001] The invention relates to a dual-mode signal acquisition board, which belongs to the technical field of data acquisition. Background technique [0002] The high-speed signal acquisition board is mainly used in SAR echo signal acquisition, radar signal reconnaissance and reception, frequency storage interference, software radio and other occasions that require ultra-high-speed and ultra-bandwidth signal acquisition. The existing high-speed signal acquisition boards usually have two technical problems. First, at the GSPS data acquisition rate, problems such as inter-channel synchronization, multiple triggering control, acquisition data preprocessing, transmission, data buffering, and clock network distribution become It is difficult to handle; second, quadrature dual-channel sampling is generally used for UHF and UWB analog signals, but it is difficult to achieve strict quadrature for UHF and UWB analog signals, which will affect the sampling signal. the...

AI Technical Summary

Problems solved by technology

There are usually two technical problems in existing high-speed signal acquisition boards. First, at the GSPS data acquisition rate, issues such as inter-channel synchronization, multiple trigger mode control, acquisition data preprocessing and transmission, data buffering, and clock network distribution become increasingly difficult. Difficult to handle; Second, orthogonal dual-channel sampling is generally used for ultra-high frequency and ultra-bandwidth analog signals, but it is difficult to achieve strict orthogonality for ultra-high frequency and ultra-bandwidth analog signals, which will affect the sampling signal the quality of

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