Teledyne LeCroy DA1855A - Manual (Page 71)

Operator’s Manual
922258-00 Rev A 65
Figure 13, X10 Gain Accuracy Setup
v. Divide the sine wave generator output voltage recorded in step 2-q by the exact
attenuation factor recorded in step 2-l. This represents the actual voltage on the
input of the amplifier. Record the result as ‘Amplifier Input Voltage’ in the Test
Record.
w. Multiply the amplifier input voltage as recorded in step 2-v by 10.0 to obtain the
expected output voltage. Record the result to four digit resolution as ‘Expected
Amplifier Output Voltage’ in the Test Record.
x. After the DMM reading has stabilized, record the measured voltage to 100 μV
resolution as ‘Measured Amplifier Output Voltage’ in the Test Record.
y. Calculate the error by dividing the expected output voltage recorded in step 2-w by
the measured output voltage recorded in step 2-x. Subtract this ratio from 1 and
multiply by 100% to get the error in percent.
z. Record the calculated error to two decimal places (±0.xx%) inthe Test Record as ‘X10
Gain Error’. Check that the calculated error is less than ± 1%