GE MEDICAL SYSTEMS
D
IRECTION FK091075, REVISION 04 VIVID 3N PRO/EXPERT SERVICE MANUAL
6-24 Section 6-8 - Calibration
6-8-3 Beamformer Calibration
Beamformer (BF) calibration is performed to calibrate each of the two BF input’s ADC channels. The
system calibrates the ADC to zero when there is no signal in the input. These bias voltages are stored
in the back end. When changing the BFs, swapping the BFs, or changing the hard disk, perform the BF
calibration procedure.
1) Access the calibration options, as described in Section 6-8 "Calibration" on page 6-21.
2) Trackball to the Calibration button and press Select. The bias voltages for each channel are
validated and stored in the back end.
NOTE: If necessary, Trackball to the Validation button and press Select to validate the currently saved
bias voltages for each channel without performing calibration.
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