BOSTON — The Boston Globe’s largest union has scheduled a contract ratification vote, even though it has yet to reach a new tentative agreement with management.

In a letter yesterday to union members that was disclosed on the Globe’s web site, Boston Newspaper Guild president Daniel Totten said setting the July 20 date for a vote was meant to “mitigate the impact” of a 23 percent pay cut that was imposed on the union after it rejected a new contract calling for an 8.3 percent wage cut and other concessions.

Totten said in the letter that talks with the Globe’s owner — The New York Times Co. — were progressing toward a new deal but he stressed that no agreement had been reached.