Acquire The Data - HP 1660E Series Service Manual

Testing Performance
To
test the voltage measurement accuracy (oscilloscope)
Acquire the data
Use the following table for steps I through 5.
Oscilloscope Settings Voltage Readings
V/Div
Ollset Supply
4 V/Div
-7.0V -14.0V
1 V/Div
-1.75 V -3.50 V
400 mV/Div
-700.0 mV -1.40 V
40 mV/Div
-70.0 mV -140.0 mV
40 mV/Div
70.0mV 140.0 mV
400 mV/Div 700.0 mV 1.40V
1 V/Div 1.75 V 3.50V
4 V/Div 7.0V 14.0V
Upper
Limit
-13.7 V
-3.43 V
-1.37 V
-137.0 mV
143.0mV
1.43 V
3.57 V
14.3 V
Lower Limit
-14.3 V
-3.57 V
-1.43 V
-143.0 mV
137.0 mV
1.37 V
3.43 V
13.7 V
I Set up the oscilloscope according to the table above.
a Press the Chan key.
b Move the cursor to the V/Div field, then use the RPG knob to dial in the V/Div values
shown on the
first
line of the table.
c Move the cursor to the Offset field. Use the front-panel keyboard to enter the offset
value shown on the first line of the table. Use the left and right cursor-control keys to
select either mV or V.
2 Acquire the zero input voltage.
a Disconnect the power supply from the channel input.
b Press the blue shift key, then press the Run key. Wait for approximately five seconds
(averaging complete), then press Stop.
e Press the Markers key. Move the cursor to the Va Volts field. Using the RPG knob,
move the Va marker over the oscilloscope trace on the display.
3 Acquire the measured voltage.
a Connect the power supply to the channel input. Set the power supply voltage
according to the first line of the table above.
b Press the blue shift key, then press the Run key. Wait for approximately five seconds
(averaging complete), then press Stop.
c Press the Markers key. Move the cursor to the Vb Volts field. Using the RPG knob,
move the Vb marker over the oscilloscope trace on the display.
d Record the voltage in the Va to Vb field in the performance test record.
4 Repeat steps I 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.
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