Channel consistency calibration method of dual-channel instrument

Abstract

The invention discloses a channel consistency calibration method for a dual-channel instrument, and the method comprises the following steps: S1, giving a step pulse signal source A and a step pulse signal source B for testing, and carrying out the parameter testing of the step pulse signal source A and the step pulse signal source B through an oscilloscope; s2, in the first connection mode, calculating gain and consistency baseline parameters of the signal receiving channels A and B, and performing consistency calibration on the signal receiving channels A and B; s3, in the second connectionmode, calculating gain and consistency baseline parameters of the signal receiving channels A and B as factory calibration parameters; and S4, calibrating signals acquired by the signal receiving channel A and the signal receiving channel B according to the factory calibration parameters when a dual-channel instrument is used for signal measurement. According to the invention, the gain, bias and dual-channel consistency of a dual-channel instrument can be debugged and calibrated, and dual-channel consistency processing is carried out on measured data during actual testing, so that the dual-channel data consistency is ensured.

Description

technical field [0001] The invention relates to the calibration of electronic measuring instruments, in particular to a channel consistency calibration method for a dual-channel instrument. Background technique [0002] Many dual-channel instruments or test systems have the problem of inconsistency between the two channels, such as spectrum analyzers with I and Q two-channel data acquisition, ATC / DME aviation with integrated radio transceiver technology and capable of signal generation and reception Electronic comprehensive tester, sampling oscilloscope / time domain reflection analyzer capable of generating pulse signals and receiving reflected signals, and other test systems with dual-channel signal generation and reception, etc. These instruments or test systems are complex because the circuits involved in the signal generation and acquisition channels, the hardware consistency is poor, and debugging is difficult. For debugging and calibration, it is necessary to cooperate...

AI Technical Summary

Problems solved by technology

These instruments or test systems are complex because the circuits involved in the signal generation and acquisition channels, the hardware consistency is poor, and debugging is difficult. Debugging and calibration, need to cooperate with software and algorithm debugging and calibration dual-channel consistency

In some applications, the signal generation and acquisition consistency of the two channels is required to be very high, and some instruments still have the phenomenon that the signal generation and reception data of the two channels are inconsistent after leaving the factory, resulting in large measurement errors.

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