Absolute delay measurement method for frequency converter

Abstract

The invention discloses an absolute delay measurement method for a frequency converter. The method comprises the following steps: (1) calibration measurement: generating two paths of signals through a signal generator, inputting one path of signal into a first channel of a digital signal acquiring device through a diode detector, inputting the other path of signal into a second channel of the digital signal acquiring device through a spectrum analyzer, and computing a pulse time difference T1 between the first channel and the second channel; (2) delay measurement: generating two paths of signals through the signal generator, inputting one path of signal into the first channel of the digital signal acquiring device through the diode detector, inputting the other path of signal into the second channel of the digital signal acquiring device after the signal passes through the frequency converter to be measured and the spectrum analyzer, and computing a pulse time difference T2 between the first channel and the second channel; and (3) computation of the absolute delay of the frequency converter, wherein the absolute delay value of the frequency converter is computed according to a formula deltaT=T2-T1. According to the absolute delay measurement method for the frequency converter disclosed by the invention, reference to standard comparison is not required, and the measuring accuracy is high.

Description

[0001] technical field [0002] The invention relates to the testing of radio nonlinear microwave devices and components, in particular to a method for measuring the absolute time delay of a frequency converter. [0003] Background technique [0004] The frequency converter is an important part of the satellite transponder, and the delay of the frequency converter is also an important component of the delay of the satellite transponder. Therefore, the accurate measurement of the delay of the frequency converter is the key to solve the precise measurement of the delay of the transponder. [0005] How to measure the absolute delay of the frequency converter in the process of testing and calibrating nonlinear microwave devices and components is a very difficult topic, which has attracted the attention of domestic and foreign instrument manufacturers. Famous foreign instrument manufacturers Agilent, R / S, Anritsu, etc. have all proposed their own patented technologies in t...

AI Technical Summary

Problems solved by technology

The method using vector network analyzer is a static method, and the method using modulation or pseudo-code spread spectrum technology is a dynamic method, but they all have certain limitations.

In the static method, it is impossible to find a Golden standard mixer with the same nature as the required test. Even if it is found, it is difficult to meet the requirements.

In the dynamic method, due to the limitation of the measurement equipment, it is impossible to obtain the requirement of high measurement accuracy, and the error is between 10-20ns, which is far from meeting the needs of current weapons and equipment.

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