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Setting Up the Instrument

7

Set the Bit Rate

Now we want to set the pattern generator's bit rate. For now, we will use the
instrument's internal clock:

Switch to the
Bit Rate Setup.

Keep the Internal
Clock Source.

Select

from the list.

1.06250 Gb/s

Ethernet

You can easily add your
favorite frequencies to the list.

1

3

2

Now select the data pattern
to be used for the test:

Select the Pattern

Press the
button to switch to the
pattern editor.

Pattern Setup

Open the

dialog box.

Pattern

Select

Select the pattern
type 2^n-1 PRBS.

Select the pattern
size 2^31-1.

The cable does not convert any data.
Therefore, we use the same pattern
for the pattern generator and the
error detector.

Besides generated patterns like PRBS, you can also use memory-based

patterns. A large variety of useful test patterns is already provided, but

you can also set up your own custom patterns. See the Help for details.

1

2

3

4

5

3

5

4

Содержание J-BERT N4903A

Страница 1: ...mation on the J BERT check out the Online Help The Help also offers printable versions of the User Guide and the Programming Guide You only need a few minutes to get started with the J BERT This Getti...

Страница 2: ...specified in the operation instructions All Light Emitting Diodes LEDs used in this product are Class 1 LEDs as per IEC 60825 1 Environmental Conditions Verify that all safety precautions are taken Th...

Страница 3: ...m any single phase AC power source supplying 100 240 V in the frequency range from 47 63 Hz The maximum power consumption is 450 VA with all options installed The power supply automatically adapts to...

Страница 4: ...PS 2 Mouse green Serial Port 1 Parallel Port VGA Monitor Ethernet Port 1 2 Audio Line Output Jack Audio Microphone Input Jack Diagnostic LED Stack USB 2 0 Channel 0 3 The Agilent J BERT is available i...

Страница 5: ...values by hand or the large knob to adjust values You can also use the knobs at the bottom of the instrument to change certain frequently used values in run time Navigating the GUI The menu buttons al...

Страница 6: ...tput Reset the instrument This sets all voltages and parameters to default values Now select the logic family LVDS for the data and clock port Check the values to make sure you can t damage your devic...

Страница 7: ...e used for the test Select the Pattern Press the button to switch to the pattern editor Pattern Setup Open the dialog box Pattern Select Select the pattern type 2 n 1 PRBS Select the pattern size 2 31...

Страница 8: ...etector uses the clock from the pattern generator 2 PG Clock Out PG Data Out ED Data In ED Clock In Press the button twice to switch to the error detector setup PG ED Setup Click the button Edit Set t...

Страница 9: ...e sure that and are selected Normal Sync Mode Automatic Sync 1 2 Switch to the Sampling Point Setup Press the button to measure the eye diagram and to position the sampling point at the center of the...

Страница 10: ...to move the sampling point horizontally Data In Delay You can see how the BER increases when measuring at the edge of the eye 1 2 Viewing Eye Results Now let s check the resulting eye Press the butto...

Страница 11: ...le be used for testing error correction algorithms Select because we do not need a measurement log file now No Logging Select a of 10 seconds as the measurement period Time 3 4 5 Press the button to s...

Страница 12: ...ument The software will automatically recognize the new component and provide the Interface Channel Icon and according setup functions in the window Jitter Perform the regular shutdown procedure provi...

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