LeCroy DA18000, Instruction Manual

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DA18000 Differential Amplifier
7-6
DA18000- O M-E Rev A
c. Measure the rms voltage with the scope (using SDEV function), as well as the AC rms
voltage at the scope input using the DMM. Record these values.
d. Calculate and record the scope accuracy: (V
scope
– V
DMM
) / V
DMM
expressed in per-
cent.
e. Measure the channel input resistance of the scope using the DMM. Record the resis-
tance accuracy (should be 50 ohms) in percent.
f. Connect the DA18000 to the channel previously measured.
g. Connect the Aux output to the positive input of the DA18000 using the same DMM
adapter. Connect a short to the negative input of the DA18000.
h. Measure the rms voltage with the scope, as well as the rms voltage at the probe posi-
tive input. Record these values.
i. Calculate and record the system accuracy: (V
scope
– V
DMM
) / V
DMM
, expressed in per-
cent.
j. Calculate the probe accuracy:
(system accuracy) – (scope accuracy) – (resistance accuracy / 2).
Ensure that this value is less than 2%.
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