Olympus EPOCH 6LT, Руководство пользователя интерфейса

Страница: 198 / 232

DMTA-10084-01EN, Rev. 2, November 2018
Chapter 11 188
Figure 11-28 Activating the BEA
11.6.2 Operating the BEA
The BEA option displays an independent back wall gain in the G2 BEA Gain
parameter of the gate 2 dialog box. This control replaces the G2 Min Depth parameter
while BEA is active. This gain is applied within the screen range of gate 2.
Initially, this base gain level is activated to show the same gain level as the primary
gain control. If the primary gain control consists of a reference gain setting and
scanning dB, the base gain level of the BEA will be the sum of the reference and
scanning gain levels. You can adjust the BEA gain independently to suppress the back
wall echo. Measurements and alarms under gate 2 are based on the attenuated echo.
To adjust back wall gain
1. In the gate 2 dialog box, press the Tab key to select G2 BEA Gain (see Figure 11-29
on page 189).
2. Turn the adjustment knob to set the gain.
3. Press the Tab key, turn the adjustment knob, and press the Enter key to select and
adjust the
G2 Start , G2 Width , and G2 Level parameters to change the BEA gate
position.