GE H
EALTHCARE
PROPRIETARY
TO
GE
D
IRECTION
5344303-100, R
EVISION
3
V
IVID
P3 S
ERVICE
M
ANUAL
Chapter 4 Functional Checks
4-23
4-3-10-1
Preparations
1.) Connect one of the probes listed in
3-6-5 "Available Probes" on page 3-24
, in Chapter 3 Installation
to the System probe connector.
2.) Turn ON the scanner (if it isn’t turned on already).
17
Change PRF (Pulse Repetition Frequencies)
- (Low Vel Reject)
Velocity scale determines pulse repetition
frequency. If the sample volume gate range
exceeds single gate PRF capability, the
system automatically switches to high PRF
mode. Multiple gates appear, and HPRF is
indicated on the display.
18
Trace Sensitivity
Adjusts the sensitivity to get more accurate
envelope trace.
19
Time Resolution
Adjusts the resolution in frequency domain.
20
Spectral Average
Optimizes the smoothness of the spectrum.
Different levels can be selected.
21
Power output
Optimizes image quality and allows user to
reduce beam intensity. 10% increments
between 0-100%. Values greater than 0.1 are
displayed.
22
SV Length
Sizes the sample volume gate.
23
Low Vel Reject
Wall Filter insulates the Doppler signal from
excessive noise caused from vessel
movement.
Figure 4-14 Controls available in CW Doppler Mode
Table 4-10 Doppler Mode Touch Panel Controls
Step
Task
Expected Result(s)
Primary Menu
Secondary Menu
CW Mode
B Pause
Frequency
Baseline
Quick Angle
Sweep Speed
Scale
Angle Correct
Invert
Low Vel Reject
Rejection
Dynamic Range
Display Format
Full Timeline
Trace Method
Trace Sensitivity
Trace direction
Modify, Auto Calcs
PW/CF Ratio
Duplex
Time Resolution
Colorize
Gray Map
Power Output
Auto Calcs
Spectral Average
Cycles, to Average
SV Length
Gain
M\D Cursor
