A former marketing executive for the Unisys Corp. was fined $10,000 by a federal judge yesterday for helping file a false income tax statement in connection with a scheme to obtain confidential defense information on contracts the corporation might seek.

Frederick J. Carville, a New York state resident and one of more than 30 individuals sentenced in the Operation Ill Wind investigation into Defense Department procurement fraud, also was given a two-year suspended prison sentence.

U.S. District Judge Claude M. Hilton noted before sentencing that Carville's crime was among the least serious that he has ruled on during the course of the two-year Ill Wind probe.

Carville said in his plea agreement in March that he was told by a former Unisys vice president to set up a private business that would be fed corporate money. He said he was then instructed to use those funds to entertain employees at the Rome Air Development Center in Rome, N.Y., and gain information on defense contracts.

Carville filed a false 1983 income tax return for his corporation and took illegal deductions for a $30,000 imported car his company bought for one of his superiors at Unisys, according to his plea statement.