3
Performance Tests
This chapter describes how to adjust the SIM980 to improve its o
ff
set
and gain accuracy, and verify performance.
In This Chapter
3.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . 3 – 2
3.2
Tools and preparation . . . . . . . . . . . . . . . . . 3 – 2
3.3
Precalibration Values . . . . . . . . . . . . . . . . . 3 – 2
3.3.1
O
ff
set Voltages . . . . . . . . . . . . . . . . . 3 – 2
3.3.2
Calibration Words . . . . . . . . . . . . . . . 3 – 3
3.3.3
DC Gain Match . . . . . . . . . . . . . . . . . 3 – 3
3.3.4
AC Gain Match . . . . . . . . . . . . . . . . . 3 – 3
3.4
Calibration
. . . . . . . . . . . . . . . . . . . . . . . 3 – 4
3.4.1
O
ff
set Adjustment . . . . . . . . . . . . . . . 3 – 4
3.4.2
DC Gain Calibration . . . . . . . . . . . . . . 3 – 5
3.4.3
AC Gain Calibration . . . . . . . . . . . . . . 3 – 5
3.5
Other tests and adjustments . . . . . . . . . . . . . 3 – 6
3.6
SIM980 Performance Test Record . . . . . . . . . . 3 – 7
3 – 1