Olympus Panametrics Epoch 4 Plus, User Manual

Page: 136 / 188

126
EPOCH 4PLUS
Figure 76 Selecting -6 dB from the Floating Gate Menu
4. Press [OPTION] to exit the menu and return to the live screen after the selections are
made.
Note: The IF GATE selection in the Floating Gate menu can only be adjusted if the
Interface Gate option is enabled and previously turned on in the Option
menu.
When Floating Gate is active, the gate level display in the parameter section of the
EPOCH 4PLUS screen shows the setting for that particular gate. The figure below details
an example in which Gate 1 is floating at the –6 dB point and Gate 2 at the –12 dB point.
Figure 77 Gate 1 Floating at –6 dB/Gate 2 Floating at –12 dB
9.10.2 Operating in -6 dB Mode
In –6 dB mode, the desired gate floats at 6 dB below the peak echo amplitude in the gate.
This corresponds to 50% of the echo’s maximum height. The screen below depicts Gate 1
with Floating Gate active in the –6 dB mode. Note that the gate is exactly at 50% of the
echo’s peak amplitude.