Secondary radar channel cross-testing method

The invention relates to the technical field of wireless signal transmission and discloses a secondary radar channel cross-testing method. The method comprises the steps as follows: a test source outputs radio frequency test signals covering all working frequency points in a working frequency band of a host to be tested one by one, the radio frequency signals are transmitted to the host to be tested after passing through passageway equipment and channels to be tested, and the host to be tested extracts feature vectors of the radio frequency test signals after the signals pass through all the steps; the host to be tested extracts the feature vectors after exchanging connection relations of the passageway equipment and the channels to be tested, and calculates the total error with the feature vectors of the two times of extraction. The invention provides a brand-new test method for the calibration of the secondary radar. The test source and the host to be tested could be connected by only using the passageway equipment (which divides the test source into a plurality of paths). According to the solution of the invention, the implementation cost is low and the system does not need to be added with any extra equipment, and the operation is simple; the ability requirement to the tester is not high. The third party equipment is not needed so as to be convenient for engineering realization.