Keysight 9000 Series Service Manual page 34

Chapter 3: Testing Performance
DC Gain Accuracy Test
16 Calculate the offset gains for the 50 Ω test and the 1 MΩ test using the following expression and record
this value in the DC Gain Test section of the Performance Test Record.
Ω
For the 50 input impedance version of this test at the 5 mV/div scale setting, use the following
equation:
ΔV
--------------
DCGainError =
All vertical scale settings used for the 1 M
vertical scale settings used except for the 5 mV/div setting should then use the following equation:
ΔV
--------------
DCGainError =
34
V – V

out
scope+
= ---------------------------------------- - 1

ΔV
V – V
in
DMM+
Ω
test (including the 5 mV/div setting) and all 50
V – V

out
scope+
= ---------------------------------------- - 1

ΔV
V – V
in
DMM+
 0.375
scope-
–

DMM-
 0.75
scope-
–

DMM-
Ω
test