GE H
EALTHCARE
D
IRECTION
FC091194, R
EVISION
11
V
IVID
7 S
ERVICE
M
ANUAL
7 - 34
Section 7-6 - Diagnostics Tools
7-6-7-1
DC Offset Calibration
DC Offset calibration also called “Beamformer Calibration” or “Front-End Alignment” is performed to
calibrate each ADC channel of the two Beamformer (BF) board inputs. The system calibrates the
Beamformer ADCs to zero output when there is no signal on the input.
These bias voltages are stored on hard disk in Back-End Processor.
You can either access
DC Offset Calibration
via the screen displayed above, or as described in
Section 6-7 "Front-End Alignment Procedure (Beamformer Calibration)" on page 6-6
The user interfaces are different, but they use the same adjustment software, so the result from the two
access methodes are equal.
1.) Select DC Offset Calibration
2.) Wait for the calibration to take place.
3.) When finished, select Show Graph.
NOTE:
Wavy line signifies system has been calibrated. A Straight line signifies that the system has not
been calibrated and can be the cause of image quality issues.
NOTE:
The LEDs displayed in the below individual board sections are relevant when the system is in
the default setting (2D-mode).
Figure 7-37 DC Calibration of the Beamformer AD-converters Passed
Summary of Contents for Vivid 7
Page 1: ...GE Healthcare Operating Documentation Vivid 7 Service Manual Part Number FC091194 Revision 11...
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Page 9: ...GE HEALTHCARE DIRECTION FC091194 REVISION 11 VIVID 7 SERVICE MANUAL vii JA ZH CN KO...
Page 38: ...GE HEALTHCARE DIRECTION FC091194 REVISION 11 VIVID 7 SERVICE MANUAL xxxvi...
Page 856: ...GE HEALTHCARE DIRECTION FC091194 REVISION 11 VIVID 7 SERVICE MANUAL Index 8...
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