Agilent Technologies 54641A, Руководство по обслуживанию

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3- 12
Testing Performance
To verify voltage measurement accuracy
3
Use the BNC tee and cables to connect the oscilloscope calibrator
/power supply to both the oscilloscope and the multimeter.
4
Adjust the output so that the multimeter reading displays the first
Volts/div supply setting value in Table 3-5.
Wait a few seconds for the measurement to settle.
5
Press the Y2 softkey, then position the Y2 cursor to the center of the
voltage trace using the Entry knob.
The
∆
Y value on the lower line of the display should be within the test limits of
Table 3-5. If a result is not within the test limits, see the “Troubleshooting”
chapter. Then return here.
6
Continue to check the voltage measurement accuracy with the
remaining Volts/div setting values in Table 3-5.
7
When you are finished checking all of the power supply setting values,
disconnect the power supply from the oscilloscope.
8
Repeat this procedure for Channels 2.
Figure 3-4
Using a Blocking Capacitor to Reduce Noise
Use a Blocking Capacitor to Reduce Noise
On the more sensitive ranges, such as 2 mV/div and 5 mV/div, noise may be a factor.
To eliminate the noise, use a BNC Tee, blocking capacitor, and BNC shorting cap to
shunt the noise to ground. See figure 3-4.
To oscilloscope input
BNC shorting
cap
To Power Supply or
Calibrator
Blocking
Capacitor
service.book Page 12 Wednesday, August 28, 2002 3:25 PM