Keysight InfiniiVision 2000 X Series, Руководство по обслуживанию

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52 2000/3000 X-Series Oscilloscopes Service Guide
2
Testing Performance
2 Set up the oscilloscope.
a Press the [Default Setup] key.
b Press the [Mode/Coupling] key; then, press the Mode softkey to select Normal .
3 Change the signal generator output frequency to 100 MHz or 200 MHz.
4 Set the power meter Cal Factor % to the appropriate value (100 MHz or
200 MHz) on the calibration chart on the power sensor. If necessary, do a linear
interpolation if a 100 MHz or 200 MHz factor is not included in the power
meter’s calibration chart.
5 Adjust the signal generator output for reading on the power meter of:
6 Press the [Trigger] key, then press the Source softkey to set the trigger source to
External .
7 Check for stable triggering and adjust the trigger level if necessary. Triggering
is indicated by the Trig’d indicator at the top of the display. When it is flashing,
the oscilloscope is not triggered. When it is not flashing, the oscilloscope is
triggered.
8 Record the results as Pass or Fail in the Performance Test Record (see
page 53 ).
If the test fails, see the “Troubleshooting” chapter. Then return here.
Signal Generator
Frequency
Calculation Power Meter
Reading
100 MHz 200 mV
pp
= 70.71 mV rms, Power = Vin
2
/50 Ω =
70.71 mV
2
/50
Ω
100 μ W
200 MHz 350 mV
pp
= 123.74 mV rms, Power = Vin
2
/50
Ω
=
123.74 mV
2
/50 Ω
306
μ
W