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Testing Performance
To test the offset accuracy (oscilloscopel
Acquire the DC input data
Use the following table for steps I through 5.
Multimeter Settings
Scope Settings
Power Supply
Scope Readings
Settings
V/Div
Offset
Supply
Minimum
Maximum
1 VlDiv
-35.00 V
-35.00 V
-35.4 V
-34.6 V
200 mViDiv
-10.00 V
-10.00 V
-10.1 V
-9.90 V
20 mV/Div
-2.00 V
-2.00 V
-2.02 V
-1.98 V
20 mV/Div
+2.00 V
+2.00 V
+1.98 V
+2.02 V
200 mVlDiv
+10.00 V
+10.00V
+9.90 V
+10.1 V
1 VlDiv
+35.00 V
+35.00 V
+34.6 V
+35.4 V
1 Connect the power supply to the oscilloscope channell input. Set the power supply
according to the first line of the table above.
2 Set up the oscilloscope according to the table above.
a Move the cursOr to the V/Div field, then use the RPG !mob to dial in the V!Div value
shown on the
first
line of the table.
b Move the cursor to the Offset field. Use the front-panel keyboard to type in the offset
value shown in the
first
line ofthe table. Use the left and right cursor-control keys to
select either mV or V. Press the Select key.
3 Acquire the measured voltage.
a Press the blue shift key, then press the Run key. Mer approximately 15 seconds
(averaging complete), press the Stop key.
b Read the voltage from the Markers voltage field. The value should be between the
minimum and maximum values listed in the table. Record the value in the
performance test record.
4 Repeat steps 1 through 3 for the second line of the table, then for the rest of the lines
of the table for channell.
5 Repeat from "Set up the logic analyzer" for channel 2, replacing channell with
channel 2 where applicable.
3-81
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