Abstract: The present TCXO test systems are of low test efficiency because of limited frequency measurement capacity. A parallel frequency measurement method based on directly frequency measurement is proposed in this paper and a parallel TCXO test system using this method was developed. At least 100 TCXOs can be measured simultaneously in the proposed test system, and its test capacity can be expanded further. Its frequency measurement error is less than ±4×10^-9 fully meeting the accuracy requirement of the design and production of state-of-the-art TCXOs. The test and production efficiency of TCXOs can be raised using this test system.

Key words: TCXO, Test system, ⁺Parallel frequency meter