Chapter 3: Testing Performance
Offset Performance Test
3–5
Offset Performance Test
Specifications
Equipment Required
Procedure
Zero Error Test 1
Disconnect all cables from the scope channel inputs.
2 Press Default Setup, then configure the scope as follows:
a Pull down the Setup menu and select Acquisition.
b When the Acquisition Setup window is displayed, enable averaging and set the # of
averages to 256 as shown below.
Offset Accuracy = ±(2% of channel offset + 1% of full scale)
= ±(Offset Gain + Zero Error)
Offset Range > ±12 div, or ±4 V, whichever is smallest
Full scale is defined as 8 vertical divisions. Vertical divisions are defined by the major scale settings above non-major scale settings.
The major scale settings are 10 mV, 20 mV, 50 mV, 100 mV, 200 mV, 500 mV and 1 V.
Description Critical Specifications Recommended Model/
Part Numbers
Digital Multimeter DC voltage measurement accuracy better than ±0.1% of reading Agilent 34401A or
Agilent 3458A
Cable Assembly
(2 required)
50Ω characteristic impedance, BNC (m) connectors Agilent 8120-1840
Adapter BNC Tee (m)(f)(f) Agilent 1250-0781
Adapter BNC (f) to dual banana Agilent 1251-2277
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