Agilent Technologies Infiniium 90000 A Service Manual page 34

Chapter 3: Testing Performance
DC Gain Accuracy Test
Calculate the offset gain using the following expression and record this value in the
15
DC Gain Test section of the Performance Test Record.
For vertical sensitivities of less than 1 volt use the following equation:
DCGainError =
For vertical sensitivity = 1 V use the following equation:
DCGainError =
34
ΔV
V – V
 
out scope+
-------------- = ---------------------------------------- - 1
 
ΔV
V – V
in
DMM+
ΔV
V – V

out scope+
-------------- =
---------------------------------------- - 1

ΔV
V – V
in DMM+
 75
scope-
⋅
–

DMM-
 60
scope-
⋅
–

DMM-