Spectral Doppler Mode
7.1.2.2
Activation of PW Mode
By pressing the left or right trackball key the screen is divided asymmetrically. The 2D image appears
above The PW spectrum appears below.
Three display formats are possible; review:
Format
(chapter 7.1.3.2)
The status area shows the PW mode activation controls.
Press the left trackball key to start the spectral display; the 2D image will be frozen.
Press the left trackball key once more; the PW spectrum will be frozen and the 2D
image returns to write mode.
Press the right trackball key and both modes (2D image and PW spectrum) are active.
7.1.2.3 PW
Gain
Control
PW Gain controls the amplification of the incoming Doppler signals. The Doppler gain should be
adjusted to a level that fills in the grayscale of the spectral analysis waveform without creating a noise.
[
PW
Mode
]
key
Rotation adjusts the amplification (brightness) of the entire displayed spectrum.
When the GAIN control is turned clockwise the entire spectrum gets brighter.
When the GAIN control is turned counterclockwise the entire spectrum gets darker.
Remarks:
*
The actual gain value is displayed on the screen [GN ...].
Range: -15dB to +15dB
*
Changing the PW gain is only possible in write mode
independent from additional modes such as Color.
Voluson
®
730Pro - Basic User Manual
105831 Rev. 0
7-5
Содержание Voluson 730Pro
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