Teledyne LeCroy DA1855A - Manual (Page 73)

Operator’s Manual
922258-00 Rev A 67
Figure 15, ÷10 Attenuator Accuracy Setup.
l. Press the X1 GAIN button to autozero the amplifier.
m. After the DMM reading has stabilized, record the reading as ‘Measured Amplifier
Output Voltage’ to 100 μV resolution in the Test Record.
n. Calculate the error by dividing the expected output voltage recorded in step 3-g by
the measured amplifier output voltage recorded in step 3-m. Subtract this ratio
from 1 and multiply by 100% to get the error in percent.
o. Record the calculated error to two decimal places (± 0.xx%) as ‘÷10 Attenuation
Error’ in the Test Record.
p. Check that the calculated error is less than ± 1%.
q. Disconnect the DMM, sine wave generator, cables and terminations, but leave the
amplifier output cable (without termination) connected to the DA1855A AMPLIFIER
OUTPUT.