Gate 1 And Gate 2; Gate Setup - Olympus EPOCH 650 User Manual

3.10.2

Gate 1 and Gate 2

Both Gate 1 and Gate 2 menus allow access to specific gate positioning and alarm
functions. When either menu is selected, the following parameters become visible
above the parameter keys.
• Zoom: Sets the display range to begin at the start position of the selected gate, and
to stop at the end position of the selected gate (gate start + gate width).
Pressing the Zoom parameter key repeatedly toggles the zoom on and off.
• Start: Adjusts the start position of the selected gate.
• Width: Adjusts the width of the selected gate.
• Level: Adjusts the screen height of the selected gate (from 3 % to 95 %).
• Alarm: Sets the alarm condition of the selected gate (Off, Positive, Negative, Min
Depth)
• Min Depth: Visible only when the Alarm parameter is set to Min Depth. Adjusts
the threshold in time-of-flight units that triggers a Min Depth alarm condition.
• AFreeze: Visible only when Alarm is Positive or Negative. Activates or
deactivates the Auto Freeze function (for more information, see "Freeze" on
page 118).
• Status: Turns the gate on or off (effects measurements, alarms, and visibility of
gate on screen).
3.10.3

Gate Setup

The Gate Setup menu allows more advanced settings for each gate to be adjusted
prior to inspection. These settings are visible above the parameter keys. The following
gate settings are available in the Gate Setup menu:
• G1 Mode: Sets the measurement trigger mode of gate 1 (Peak, 1stPeak, Edge, J-
Flank)
• G1 RF: Sets the polarity of the gate 1 when the instrument is operating in RF
rectification (Dual, Positive, Negative)
• G1 %Amp: Used only in Edge mode. Sets the measurement trigger for the percent
amplitude digital measurement of gate 1 when in Edge detection mode (High
Peak, 1stPeak).
DMTA-10055-01EN, Rev. A, February 2015
Software Overview 59