Agilent Technologies 8133A Instrukcja Obsługi Pobierz pdf (Strona 62)

62 16800 Series Portable Logic Analyzers Service Guide

3 Testing Performance

may be different based on your test setup. Bring stray

channels into alignment if necessary. See page 50.

12 Now set the pulse generator to the new test frequency.

The logic analyzer will be tested using a double- edge

clock. The test frequency is half the test clock rate

because data is acquired on both the rising edge and the

falling edge of the clock. Set the frequency to 250 MHz

plus the frequency uncertainty of the pulse generator,

plus a test margin of 1%.

For example, if you are using an 8133A pulse generator,

the frequency accuracy is ±1% of setting. Use a test

margin of 1%. Set the frequency to 250 MHz plus 2%

(255 MHz).

13 The pulse measured on the oscilloscope may have moved

slightly. Verify the DC offset and adjust it if necessary.

See page 41.

14 Verify the oscilloscope Deskew and adjust if necessary.

See page 42.

15 Adjust the measured pulse width from the pulse generator

to 1.5 ns (minus the test margin) as described on

page 43.

16 Open the Thresholds and Sample Positions dialog, and

align the blue bars vertically. See page 49.

17 Grab the blue bar for “My Bus 1” and move it to the

recommended starting position you noted on page 61.

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Agilent Technologies 8133A Instrukcja Obsługi Strona 62