Agilent Technologies InfiniiVision 7000B Series Manual de servicio descargar pdf (Pagina 46)

46 7000 Series Oscilloscopes Service Guide

2 Testing Performance

To verify horizontal delta t accuracy

This test verifies the horizontal ∆t accuracy. In this test, you

will use the oscilloscope to measure the output of a time mark

generator.

Test limits: ±0.0015% of reading ±0.1% of full scale ±20 ps (same

channel)

1 Connect the equipment:

a Connect the calibrator output to the oscilloscope channel

1 input.

2 Set up the signal source.

1 Select Marker on the oscilloscope calibrator.

2 Set the calibrator for 100 µs markers (period = 100 µs).

3 Set up the oscilloscope.

a Set channel 1 Coupling to DC.

b Set channel 1 Imped to 50 Ohm.

c Press the Display key, then set the Vectors softkey to off.

d Press the AutoScale key.

e Set the time base to 20 µs/div.

f Press the Menu/Zoom key, then set the Time Ref softkey to

Left.

g Adjust the Trigger Level knob to obtain a stable display.

Table 10 Equipment Required to Verify Horizontal ∆t Accuracy

Equipment Critical Specifications Recommended

Model/Part

Oscilloscope

Calibrator

Stability 5 ppm after 1/2 hour Fluke 5820A

Cable BNC, 3 feet Agilent 10503A

7000 service guide.book Page 46 Thursday, October 16, 2008 12:18 PM

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Agilent Technologies InfiniiVision 7000B Series Manual de servicio Pagina 46