6100B/6105A
Users Manual
7-8
A digital representation of the requested output waveform is sampled, converted to an
analog signal and amplified. The D to A conversion process and subsequent amplification
introduces a phase shift and the output at the binding posts lags the digitally generated
waveform. Figure 7-1 is a stylized representation of the relationship between the Phase
Reference, the digitally sampled waveform and the analog output signal.
gdw47.bmp
Figure 7-1. Signal Generation
The objective of phase calibration adjustment is to remove the phase offset between the
Phase Reference and the analog output signal. Figure 7-2 shows the digitally sampled
waveform phase shifted to align the analog output to the Phase Reference. In practice
there will be a small residual phase error determined by the accuracy of measurement.
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