Teledyne LeCroy DA1855A - Manual (Page 67)

Operator’s Manual
922258-00 Rev A 61
Figure 9, X1 Gail Accuracy
j. Press the X1 GAIN button to remove any residual DC offset from the input. (A DC
component may interfere with the RMS computation in some DMMs.)
k. After the DMM has stabilized, record the reading to 100 μV resolution as ‘Amplifier
Output Voltage’ in the Test Record.
l. Divide the measured amplifier output voltage from step 1-k by the sine wave
generator output voltage (amplifier input voltage) in step 1-f. Subtract the ratio
from 1.0 and multiply the result by 100% to get the error in percent.
m. Record the result to two decimal places (± 0.xx %) as ‘X1 Gain Error’ in the Test
Record.
n. Check that the calculated X1 Gain error is less than ± 1.0%.