# :MEASure:MTESt:FUINtervals?

Mask Test Failed UI Commands

- :MEASure:MTESt:FUINtervals?
- :MEASure:MTESt:FUINtervals:LOCation?
- :MEASure:MTESt:FUINtervals:STATus?
- :MEASure:MTESt:FUINtervals:STATus:DETails?
- :MEASure:MTESt:FUINtervals:STATus:REASon?

## Query Syntax

    :MEASure:MTESt{N}:FUINtervals?

{N} identifies a specific mask and must be a value from 1 to 16. For example, `:MTESt2` selects mask 2.

## Description

Returns the number of Failed UI reported in the Masks Tests results table during eye mask testing. The Failed Unit Intervals operate on Tested Waveforms (see `:MEASure:MTESt:TWAVeforms?`). The Failed Unit Intervals result can be questionable when the scale is changed.