Service manual

GE MEDICAL SYSTEMS
D
IRECTION 2300749-100, REVISION 2LOGIQ
TM
3 SERVICE MANUAL
Chapter 4 4-21
4-4-5-2 Doppler Mode OP Panel Controls
4-4-5-3 Doppler Mode Top and Sub Menu Controls
Table 4-10 Doppler Mode OP Panel Controls
Step Task Expected Result(s)
1
Press PW Mode key PW Mode Starts
2
Adjust Gain
Amplifies the overall strength of the echoes processed in the Color Flow window. Turn the Gain dial
(PW Mode key) to the left/right to increase/decrease Gain.
3
Display M/D-Mode Cursor
Displays the M/D-Mode cursor on the B-Mode image. Press Cursor and Trackball to position sample
volume graphic. Rotate SV gate to adjust sample volume gate size.
4
Audio Volume Controls Doppler audio output. Turn Volume left/right to adjust PW Doppler audio.
Table 4-11 Doppler Mode Top and Sub Menu Controls
Step Task Expected Result(s)
1
Rejection
Adjust rejection level. When this control is increased, low-level echoes are rejected and appear darker in
the PW image. Press Rejection Paddle left/right keys to adjust the level.
2
Sweep Speed Changes the speed at which timeline is swept. Rotate left/right to increase/decrease the value.
3
Full Timeline Displays only timeline screen. Press the Full Time in the Sub-menu screen to activate.
4
Display Format
Select the format to display B image and PW image on the monitor. Press Paddle switch and select from
the Top Menu
5
Frequency
Enables the adjustment of the probe’s operating frequency. Press Frequency and select desired value. The
selected frequency is displayed in the status window.
6
Angle Correct Optimizes the accuracy of the flow velocity. Rotate left/right to adjust the angle relative to the probe face
7
Spectral Invert
Vertically inverts the spectral trace without affecting the baseline position. Press invert to invert the spectral
trace. The Plus and Minus signs on the velocity scale reverse when the spectrum is inverted.
8
Sample Volume Length Sizes the sample volume gate.Rotate SV lenght Knob to resize gate.
9
Spectral Average Activates Spectral Average.
10
Duplex / Triplex Activates Duplex/Triplex Mode of operation
11
Color Map
Colorize the gray scale image to enhance the eyes’ discrimination capability. Select the Color Map on the
sub menu and select the approporiate map.
12
Trace Direction / Method Provides automatic Trace of the Spectrum above and/or below the base line.
13
Dynamic Range
Controls how echo intensities are converted to shades of gray. Click Dynamic Range Paddle key to
increase/decrease the value.
14
Auto Calculations Activates Auto Calculations of the Measurements
15
Adjust Angle Steer
Slant the Color Flow linear image left or right to get more information without moving probes.Rotate Angle
Steer to the left/right to slant the linear image.
16
Move Baseline
Adjusts the baseline to accommodate faster or slower blood flows to eliminate aliasing. Rotate Baseline left/
right to shift the baseline.
17
PRF / Wall Filter
Adjust the velocity scale to accommodate faster/slower blood flow velocities. Rotate PRF left/right to select
values
18
Trace Sensitivity Activates Trace Sensitivity.