Signal receiving channel frequency response compensation method under condition of wide temperature range

Abstract

The invention provides a signal receiving channel frequency response compensation method under the condition of wide temperature range, comprising the following steps: arranging temperature sensors in temperature-sensitive positions of a signal receiving channel of an instrument to acquire real-time temperature change in the positions of the channel when the ambient temperature changes; constructing a frequency response compensation model of the signal receiving channel determined by the sensitive positions; acquiring calibration parameters through calibration; and compensating the frequency response of the sensitive positions by use of the calibration parameters and the compensation model according to the real-time temperature of the positions of the channel. By using the compensation method of the invention, the frequency response of the signal receiving channel of the instrument can be compensated accurately in real time in a wide temperature range and in a wide frequency range, and the channel frequency response after compensation keeps the same order of magnitude of flatness in the full temperature range. Therefore, the instrument can provide the same amplitude measuring precision at any temperature in the full temperature range, and the amplitude measuring accuracy is improved significantly.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to a compensation method for the frequency response of a signal receiving channel under wide temperature conditions. Background technique [0002] The high-performance broadband signal analysis instrument compensates the frequency response of the signal receiving channel of the instrument under normal temperature environment to be very flat through compensation technology, so as to ensure that the instrument has high amplitude measurement accuracy. However, as the ambient temperature changes to a high or low temperature region, the frequency response of the signal receiving channel of the instrument will continue to deteriorate, and the accuracy of amplitude measurement will decrease. This is because the existing compensation methods usually perform frequency response compensation on the instrument in a normal temperature environment. Obtain benchmark compensation data, and only mak...

AI Technical Summary

Problems solved by technology

The invention proposes a new frequency response compensation method, which solves the problem that the frequency response of the instrument deteriorates and the accuracy of amplitude measurement decreases in extreme high temperature and low temperature environments, and enables the instrument to maintain a normal temperature environment in the entire wide temperature environment. Under the frequency response and amplitude measurement accuracy, it can greatly reduce the warm-up time of the instrument and improve the test performance of the instrument

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