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Testing, Adjusting, and Troubleshooting
To verify voltage measurement accuracy
Continue checking the voltage measurement accuracy with the
7
remaining power supply setting lines in the following table.
Table 7-6
Voltage Measurement Accuracy
Volts/Div setting
5 V/Div
2 V/Div
1 V/Div
0.5 V/Div
0.2 V/Div
0.1 V/Div
50 mV/Div
20 mV/Div
10 mV/Div
5 mV/Div
2 mV/Div
1 mV/Div*
*
Disconnect the power supply from the oscilloscope, then repeat
8
steps 1 to 7 for channel 2.
Channel 2 is labeled "2" on HP 54645A and "A2" on HP 54645D.
7-18
Power supply setting
35 V
14 V
7 V
3.5 V
1.4 V
700 mV
350 mV
140 mV
70 mV
35 mV
14 mV
7 mV
Full scale is defined as 16 mV on the 1 mV/div range. Full scale on all
other ranges is defined as 8 divisions.
Test limits
34.24 V
to
35.76 V
13.696 V
to
14.304 V
6.848 V
to
7.152 V
3.424 V
to
3.576 V
1.3696 V
to
1.4304 V
684.8 mV
to
715.2 mV
342.4 mV
to
357.6 mV
136.96 mV
to
143.04 mV
68.48 mV
to
71.52 mV
34.24 mV
to
35.76 mV
13.696 mV
to
14.304 mV
6.696 mV
to
7.304 mV
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- Preparing the Oscilloscope
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Troubleshooting
