Gate Settings

The Digital Oscilloscope has controls for setting up your Gate Tree. There is a Basic Mode (not to be confused with the ODIS Basic Mode) and an Advanced Mode for finer control. In Both cases, gates are added to the Gate Tree (shown on the bottom left of the Gate Settings tab.

Basic Mode

Gate Settings (Basic)

The Basic mode consists of the Gate Tree and a set of buttons. To add a gate, press on the specified button. The gate will become a child of whatever gate is selected in the Gate Tree window.

Front Surface Follower, Rising Edge or Falling Edge

Sub-Surface Follower, Rising Edge or Falling Edge

Data Gate

RTG Gate

B-Scan Gate

Before adding a data gate

After adding a data gate

Advanced Mode

Gate Settings (Advanced)

By clicking on the "Show Advanced" button, the user will see the Advanced gate settings. This allows for more gate options and better control over gate positioning. To add a gate, right-click on the Gate Tree and select "Add Gate". A dialog box will appear letting the user specify the gate type and settings.

The gate will become the child of whichever gate was originally clicked.

Add Gate Menu on the Gate Tree

Dialog when adding a gate. The user can specify the type, name, color and other features.

Dialog when adding a SALI Gate.

Add Gate Dialog

The "Add Gate" dialog has the following inputs:

Gate Name

the user-defined name of the gate. Gate names must be unique.

Start (us)

the start of the gate in microseconds. If this gate is the child of a follower, the start is the relative position between the follower crossing and the gate.

Length (us)

the desired length of the gate in microseconds.

Threshold (us)

the Data Detect threshold of the gate. Signals below this gate threshold will be ignored, unless the thresholds are ignored in Configuration.

Abs. THreshold

whether the gate uses an Absolute threshold (i.e. the same threshold for both positive and negative signals), or is used for either positive or negative thresholding.

Note: this function is obsolete and will be removed in a future update.

Display Color

the color of the gate as displayed on the Digital Oscilloscope. User selectable using a color map dialog.

Channel

selects the A/D channel on which this gate runs. Only valid for A/D boards with multiple inputs.

Type of Gate

select the main function of this gate. Possible gate types are:

Name	Description
RE	Rising Edge Follower
FE	Falling Edge Follower
Data	Standard Data gate
Dyn	Dynamic Gate
RTG	Relative Threshold Gate
Void	Void Gate1
WF	Waveform Region
FFT	FFT Region

Pressing "OK" will add the gate to the appropriate Gate Tree, pressing "Cancel" will exit without changes. For more information on the gate types, see Gates.

1. Obsolete: use the Void feature on Data gates instead

Gate Features

A selection of Gate Features is shown on the Advanced tab, allowing the user to select the features that will be collected on the gate. Some features will be disabled depending on the type of gate selected. For Details see Gate Features.