Dc Gain Accuracy Test - Rigol DS1074B Service Manual

RIGOL

DC Gain Accuracy Test

Specification:
DC Gain Accuracy
Specification
[1]
Note : Full Scale = 8 × Current Vertical Scale
Test Procedures:
1. Connect the active signal terminal of Fluke 9500B to CH1 of the oscilloscope, as
shown in Figure 3-8.
2. Turn on Fluke 9500B and set its impedance to 1 MΩ.
3. Output a DC signal with +6 mV
4. Configure the oscilloscope:
Press CH1 in the vertical control area (VERTICAL) at the front panel to turn
1)
on CH1.
Press CH1  Probe to set the probe attenuation ratio to "1X".
2)
Rotate VERTICAL
3)
4) Rotate HORIZONTAL
Press VERTICAL
5)
Press Acquire  Acquisition and use
6)
mode; press Averages and use
5. Press Measure  Voltage  Vavg to turn on the average measurement
function. Read and record Vavg1.
6. Adjust Fluke 9500B to make it output a DC signal with -6 mV
7. Press Measure  Voltage  Vavg to turn on the average measurement
function. Read and record Vavg2.
8. Calculate the relative error of this vertical scale: |(Vavg1 - Vavg2) - (Vout1 -
Vout2)|/Full Scale × 100%.
9. Keep the other settings of the oscilloscope unchanged:
1) 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.
2) Adjust the output voltage of Fluke 9500B to 3 × the current vertical scale and
-3 × the current vertical scale respectively.
3) Repeat steps 3 to 7 and record the test results.
4) Calculate the relative error of each vertical scale: |(Vavg1 - Vavg2) -
(Vout1 - Vout2)|/Full Scale × 100%.
10. Turn off CH1. Repeat the steps above to test the relative error of each scale of
CH2, CH3 and CH4 and record the test results.
3-8
2 mV/div to 5 mV/div, ±4% × Full Scale
10 mV/div to 10 V/div，±3% × Full Scale
voltage (Vout1) via Fluke 9500B.
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SCALE to set the vertical scale to 2 mV/div.
SCALE to set the horizontal time base to 100 us.
POSITION to set the vertical position to 0.
Chapter 3 Performance Test
[1]
to select "Average" acquisition
to set the number of averages to 32.
voltage (Vout2).
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DS1000B Service Guide