| 摘要 |
PROBLEM TO BE SOLVED: To obtain a transmitting/receiving circuit module in which the development period for the redesign of a circuit can be shortened and rational production control can be executed. SOLUTION: Since the transmitting/receiving circuit module is constituted of a combination of a main substrate and a plurality of smaller substrates 17 (17a to 17f), adaptation to all standards and all interface circuits can be realized by previously preparing small substrates 17 suited to various standards and individually exchanging these small substrates 17. Consequently, extremely quick meeting to requirements can be attained.
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