Agilent Technologies 42D Especificações Página 51

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3-7
Testing Performance
To verify digital channel threshold accuracy
1
Turn on the test equipment and the oscilloscope. Let them warm up for
30 minutes before starting the test.
2 Set up the oscilloscope calibrator.
a Set the oscilloscope calibrator to provide a DC offset voltage at the
Channel 1 output.
b Use the multimeter to monitor the oscilloscope calibrator DC output
voltage.
3
Use either method 1 or method 2, described in the following, to connect
the digital channels for testing.
a Method 1 — Using the Test Connector
Use the 8-by-2 test connector and the BNC cable assembly to connect digital
channels D0-D7 to one side of the BNC Tee. Then connect the D0-D7 ground
lead to the ground side of the 8-by-2 connector. See figure 3-2.
Figure 3-2
Setting Up Equipment and Test Connector for the Threshold Test
42
t
hr
es
h.
cd
r
HP 34401A
!
Test
Connector
Channels 8 - 15
Channels 0 - 7
BNC-Banana
cable
Oscilloscope
Calibrator
Digital
Multimeter
service.book Page 7 Wednesday, August 28, 2002 3:25 PM
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