# Dupe checking

A log can be checked for dupes from the tools menu. There are some restrictions on the frequency field when used in dupe checking. It should either contain a 'dot' after the MHz number or contain 3, 6 or 9 numbers after the Mhz number.

Figure: Dupe check dialog

When using hamlib, the total amount of numbers in the frequency field can be selected in the hamlib page of the preferences dialog.