Stanford Research Systems DS360 Operating Manual And Programming Reference page 113

9. DC Offset
These tests measure the offset accuracy of the function of the DS360.
Setup
Connect the positive output of the DS360 to the DVM. Set the DVM to DC volts, auto-ranging. Perform
any auto zeroing functions. Set the integration time long enough for 0.1% accuracy.
To make residual offset measurements it is necessary to trigger the DVM from the DS360 sync output to
average out the AC waveforms. For these measurements it is necessary to set the integration time longer
than that for normal measurements.
Procedure
1) Reset the DS360 (Turn power off, wait 2 seconds, then turn power on w/ [CLR] pressed).
2) Verify the offset linearity (DC only) at various points. For each value in the table below, perform
2b) and 2c).
a) Press
[AMPL] [0] [V
b) Press [OFFST] [offset] [V
c) Measure the output voltage on the DVM. Record the results on the test record.
3) Measure the residual offset (0 V) for different amplitudes. For each amplitude listed in the table
below, perform steps 3c and 3d.
a) Connect the SYNC BNC from the DS360 to the trigger input of the DVM. Set the integration
time to at least 1 second.
b) Press
[OFFST] [0] [V
c) Press
[AMPL] [amplitude] [V
Offset Voltage
±20 V
DC
±2.0 V
±0.2 V
±0.02 V
±0.002 V
]
DC
]
DC
Test Amplitudes
10 V
RMS
1.0 V
RMS
0.1 V
RMS
0.01 V
RMS
0.001 V
]
DC
]
DC
DS360 Ultra Low Distortion Function Generator
Performance Tests 6-19
DC
DC
DC
DC
RMS