Specifications

Chapter 2 Performance Calibration Test RIGOL
DS1000E/D Performance Verification Guide
2-3
DC Gain Accuracy Test
Specifications:
DC Gain Accuracy ≤4%×Full Scale (2 mV/div to 5 mV/div)
≤3%×Full Scale (10 mV/div to 10 V/div)
Explanation:
Full Scale = 8 div×vertical scale. Relative error of each scale: |(Vavg1–Vavg2)–(V
out1
-V
out2
)|/Full Scale×100%≤X%
(the value of X is 3 when the vertical scale is 10 mV/div to 10 V/div and the value of X is 4 when the vertical scale is
2 mV/div to 5 mV/div); otherwise, the test fails. For example, when the vertical scale is 1 V/div, input DC signals with
+3 V
DC
and -3 V
DC
voltages respectively, the values of Vavg1 and Vavg2 are +3.06 V and -3.04 V respectively, the
relative error is |(+3.06 V-(-3.04 V))-(+3 V-(-3 V)) |/(1 V/div*8 div) × 100% = 1.25% and the test passes.
Test Device: Fluke 9500B
Test Procedures:
1) Connect the active head of Fluke 9500B to CH1 of the oscilloscope.
2) Enable Fluke 9500B and set the output impedance to 1 MΩ.
3) Output a DC signal with +6 mV
DC
voltage (V
out1
) from Fluke 9500B.
4) Configure the oscilloscope:
a) Press CH1 in the vertical control area (VERTICAL) at the front panel to enable CH1.
b) Rotate VERTICAL SCALE to set the vertical scale to 2 mV/div.
c) Rotate HORIZONTAL SCALE to set the horizontal time base to 10 μs.
d) Rotate VERTICAL POSITION to set the vertical position to 0.
e) Press Acquire Acquisition and use to select “Average”. Then, press Averages
and use to set the number of averages to 32.
5) Enable the average measurement function of the oscilloscope. Read and record Vavg1.
6) Adjust Fluke 9500B to output a DC signal with -6 mV
DC
voltage(V
out2
).
7) Read and record the average value Vavg2 at the moment.
8) Calculate the relative error of the vertical scale:
|(Vavg1–Vavg2)–(V
out1
-V
out2
)|/Full Scale×100%.
9) Keep other settings of the oscilloscope unchanged:
a) Set the vertical scale to 5 mV/div, 10 mV/div, 20 mV/div, 50 mV/div, 100 mV/div, 200
mV/div, 500 mV/div, 1 V/div, 2 V/div, 5 V/div and 10 V/div respectively.
b) Adjust the output voltage of Fluke 9500B to ±3 div respectively.
c) Repeats steps 2), 3), 4), 5), 6) and 7) and record the results.
d) Calculate the relative error of each scale.
10) Turn CH1 off. Repeat the above test steps to test CH2 and record the test results.