Agilent Technologies 8133A Spezifikationen PDF herunterladen (Seite 50)

Chapter 3: Testing Logic Analyzer Performance

Test Pod 1 in 250 Mb/s Mode

NOTE: As a point of curiosity, you may want to determine the absolute minimum

pulse width and/or absolute maximum frequency at which data can be

acquired. The “Performance Test Record” on page 60 does not include

places for recording these values because the Performance Verification

procedure only verifies that the logic analyzer meets specifications.

Determination of additional parameters is not required, but may be

performed at the discretion of the calibration laboratory.

On some pulse generators, the signal outputs may become unstable for a

short period of time when the signal parameters are adjusted. Adjusting

the pulse generator while the logic analyzer is running can cause a false

failure.

If the error message is displayed immediately after making an adjustment

to the pulse generator, select OK to close the error display window and re-

run the logic analyzer.

Test the complement of the bits (250 Mb/s mode)

Now test the logic analyzer using complement data.

1 On the 8133A pulse generator, in the PULSE setup for CHANNEL 2, select

COMP.

2 Note that the signal on the oscilloscope has moved. Change the

oscilloscope’s horizontal position to -725 ps (or as required) to center the

measured pulse on the oscilloscope display.

3 Verify the DC offset and adjust it if necessary. See page 36.

4 Deskew the oscilloscope if necessary. See page 37.

5 Adjust the oscilloscope’s measurement markers to measure the pulse

width. Set the markers so that ∆=1.43 ns (this assumes you are using the

8133A pulse generator and the Infiniium 54845A oscilloscope). Adjust the

pulse generator so that the pulse width is 1.43 ns as measured by the

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Agilent Technologies 8133A Spezifikationen Seite 50