Agilent Technologies 54622D, 54624A, 54621D, 54622A To verify digital channel threshold accuracy

Testing Performance

To verify digital channel threshold accuracy

To verify digital channel threshold accuracy

This test verifies the digital channel threshold accuracy specification of the

Agilent 54621D/22D Mixed-Signal Oscilloscope.

Test Threshold Accuracy only on the 54621D/22D Mixed-Signal Oscilloscope

You need to perform these instructions only if you will be testing the Agilent 54621D/22D Mixed-Signal Oscilloscope.

Threshold accuracy test limits= ±(100 mV + 3% of threshold setting)

When to Test You should perform this test every 24 months or after 4000 hours of operation, whichever comes first.

What to Test Use these instructions to test the threshold settings of digital channels D7-D0. Then, use the same instructions to test digital channels D15-D8.

Verifying Test Results After each threshold test, record the voltage reading in the Performance Test Record at the end of this chapter. To verify whether a test passes, verify that the voltage reading is within the limits in the Performance Test Record.

Table 3-2	Equipment Required to Test Threshold Accuracy
	Equipment	Critical Specifications	Recommended Model/Part
	Digital Multimeter	0.1 mV resolution, 0.005%	Agilent 34401A
		accuracy
	Oscilloscope Calibrator	DC offset voltage 6.3 V	Fluke 5820A
	BNC-Banana Cable		Agilent 11001-60001
	BNC Tee		Agilent 1250-0781
	BNC Cable		Fluke 50Ω cable, P/N 686318
	BNC Test Connector, 8-by-2		User-built (See “Obtain a BNC
			connector and an 8-by-2 section
			of Berg strip.” on page 3-4.)
	Test Fixture	PV test fixture	Agilent 01660-63801
	Probe Cable		Agilent 01650-61607

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