GE Vivid 7, Руководство по обслуживанию

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GE H
EALTHCARE
D
IRECTION
FC091194, R
EVISION
11 V
IVID
7 S
ERVICE
M
ANUAL
4 - 34 Section 4-3 - Functional Checks
4-3-6-3 Check Width, Focus, Framerate, Frequency
These 2D Mode Functions are located on Mode Dependant Rotaries.
The results of these adjustments must be verified on the 2D sector on the screen.
Table 4-6 2D Mode: Check Width, Focus, Framerate and Frequency
Step Task Expected Result
1.
Turn the rotary labeled
WIDTH
left and right.
Controls the size or angular width of the 2D image
sector.
A smaller angle generally produces a scan with higher
frame rate.
2.
Turn the rotary labeled
FOCUS
left and right to move
the focal point up and down.
Changes the location of the focal point(s).
A triangular focus marker indicates the depth of the
focal point.
3.
Turn the rotary labeled
FRAMERATE
left and right to
adjust the Frame Rate
Adjusts frame rate.
Rotate the knob clockwise to increase frame rate.
The relative setting of the frame rate is displayed in the
status window.
When adjusting frame rate, there is a trade off between
spatial and temporal resolution.
4.
Turn the rotary labeled
FREQUENCY
left and right to
verify that the probe’s operating frequency can be
adjusted
Enables the adjustment of the probe’s operating
frequency.
Rotate the knob clockwise to increase the frequency.
The selected frequency is displayed in the status
window.
For some probes/applications, the lowest frequency
settings will be Octave Imaging settings.