Cirrus Logic CDB5480U - Manual (Page 25)

CDB5480U
DS893DB5 25
Figure 20. Calibration Window
The Refresh Screen button will update the contents of the screen by reading all the register values from
the part. It is a good idea to press the Refresh Screen button when entering the Calibration window, or
after modifying any registers to reflect the current status of the CS5480.
2.6.1 Save Cal and Load Cal Buttons
Clicking the Save Cal button will save the calibration widow's configuration to a .txt file. Clicking the Load
Cal button will recall a saved configuration and store values into the CS5480.
2.6.2 Offset / Gain Register
In the Offset and Gain Calibration boxes, the offset and gain registers for all channels are displayed in
hexadecimal and decimal formats. These registers can be modified directly by typing the desired value in
the display boxes. There are three types of offset registers: DC offset, AC offset and power offset. The
AC offset registers only affect the RMS register values. The active and reactive power offset registers only
affect the active and reactive power register values, respectively. The DC, AC, and power offset registers
are two's complement numbers whose values range from -1 to +1. The gain register value ranges from 0
to 4.