ACUSON Cypress™ Operator’s Manual
5-39
Continuous Wave Doppler (CW) Scanning
Activate the
CW
Display
To activate the
CW
spectral display, follow these steps:
1.
Press the
CW
mode key once. The
2D
sector is live and the Trackball is
assigned to the
CW
cursor line.
2.
Position the cursor to the desired portion of the image, and press
CW
a sec-
ond time. This freezes the
2D
image and activates the
CW
spectral display.
3.
Pressing
CW
again toggles between the active spectrum and the real-time
sector image. You can also reposition the
CW
sample while the
2D
image is
frozen. The cursor in the
2D
image will move but the
2D
image will remain
frozen.
Main Knob Controls Volume and
CW
Gain
When you press the
CW
mode key two options appear—Volume and CW Gain.
They are controlled by the Main knob. Press the Main knob to toggle between
the options.
Volume
Increases or decreases the amplification of the audio signal sent to
the system speaker.
CW
Gain
Turn the knob clockwise to increase the amplification of the Dop-
pler signal. Turn counterclockwise to decrease.
In Freeze mode, turn the Main knob to scroll through the frames.
CW
TO SWITCH
BETWEEN
VOLUME AND
GAIN, PRESS
THE MAIN KNOB