# Time at Amplitude

Time at Amplitude is the measure of the time at which the specified edge amplitude occurs on the displayed waveform.

When this measurement is selected, a dialog box appears from which you select the edge number, direction, amplitude value, and if it is restricted to a region.

## Configurable Measurement Parameters

This measurement is affected by the following settings (choose Measure > Thresholds...):

- Thresholds tab

## To measure

1. Click the button and enter the waveform edge number, amplitude, and direction at which to perform the measurement.
2. Select the Region in which to make the measurement:
   - Displayed Waveform — is what you see in the waveform window (which can be a zoomed-in view of the complete waveform).
   - Entire Waveform — specifies the complete waveform.
   - Region N — If regions are enabled for the selected signal, you can select one of those regions.

## SCPI Command

`:MEASure:HORizontal:TVOLt`