GE HEALTHCARE
DIRECTION FC091194, REVISION 11 VIVID 7 SERVICE MANUAL
7 - 64 Section 7-8 - Acquisition Diagnostics
7-8-2 Calibration Screen
After following the steps in 7-8-1-1 "Start System Test" on page 7-63, the default screen will be the
Calibration screen.
The lower part of the Calibration screen is different on units with Front-End Processor version 1 (FEP1)
and Front-End Processor version 2 (FEP2).
7-8-2-1 Functions Available from the Calibration Screen
These functions are available from the Calibration screen.
• DC Offset Calibration (DC Offs. Cal) of the A/D converters in the Front-End.
• Reset the calibration (Cal. Reset) to the factory default setting.
• Show a graph regarding the calibration (Show graph).
• Deselect/Select channels are used in manufacturing to isolate noisy channels (Channel Control).
With a linear probe connected to the system, it is possible to disconnect groups of channels either
on the TX Board or on the RX Board to isolate the noise source.
• The buttons in the lower part of the screen are used for board testing (see 7-8-3 - System Test on
page 7-66).
The number of buttons in the lower row are different for units with FEP1 and FEP2. The illustration in
Figure 7-68 is the Calibration Screen on units with FEP1.
Figure 7-69 "Calibration Screen on units with FEP2" on page 7-65 illustrates the Calibration Screen on
units with FEP2.
Figure 7-68 Calibration Dialog on units with Front-End rack version - 1 (FEP1)
Channel Control
(used for factory
tests)
DC Offs. Cal
Cal. Reset
Show graph
“LEDs”
Gray - Test not done
Green - Test Passed
Red - Test failed
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