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Agilent Technologies BERT Serial Getting Started

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Getting Started

with the
Agilent Serial BERT
N4906B
You only need a few minutes to get started
with the Serial BERT.
This Getting Started Brochure helps you to
quickly understand the operating principles
and set up your first BER test.
If you need more detailed information on
the Serial BERT, check out the Online Help.
The Help also offers printable versions of the
User´s Guide and the Programming Guide.

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  • Page 1: Getting Started

    Getting Started with the Agilent Serial BERT N4906B You only need a few minutes to get started with the Serial BERT. This Getting Started Brochure helps you to quickly understand the operating principles and set up your first BER test. If you need more detailed information on the Serial BERT, check out the Online Help.

  • Page 2: Safety Summary

    Contact your customer engineer through your local Agilent Technologies Service Center. Y ou can find a list of local service representatives on the Web at: Do Not Remove the Instrument Cover Operating personnel must not remove instrument covers.

  • Page 3: Power Requirements

    Installing the Agilent Serial BERT Inspect Shipment Check if the Serial BERT shipping container contains the following standard deliverables: If the contents are incomplete, if there is mechanical damage, or if the instrument does not work within its specifications, notify the nearest Agilent office. The Agilent office will arrange for repair or replacement without awaiting settlement.
  • Page 4 Operating the Agilent Serial BERT Now that the instrument is running, let’s take a look at its front panel elements: Instrument Setup Controls Accumulation Controls Keypad and Front Panel Knob PG Connectors Power Switch and Earth Terminal Preset Local PG Controls ED Controls ED Connectors The Agilent Serial BERT is available in different versions.
  • Page 5 Operating the Agilent Serial BERT Changing Parameters With the touchscreen, your finger is the mouse. Tipping an item with your finger is like clicking it with the mouse. You can use the numeric keypad to enter 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.

  • Page 6: Preparing The Test

    Preparing the Test What Are We Testing? The quickest way to familiarize yourself with the instrument is to set up a short test. You can test the BER on a cable. All you need for this test is an APC/RPC cable for the data port connection and an APC/RPC-SMA adapter cable to connect the PG clock output to the ED clock input.

  • Page 7: Setting Up The Instrument

    Setting Up the Instrument 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. Select the Internal Clock Source. Select the Pattern Enter the required Now select the data pattern clock rate or select...
  • Page 8 Setting up the Instrument Setting up the Error Detector The next step is to set up the error detector’s inputs. Press the ED Setup button to switch to the error detector setup. Enter the termination voltage Set the Active Input. In our that matches the output case, we choose Normal termination of the DUT, in our...
  • Page 9 Setting Up the Instrument Synchronizing the Pattern Now make sure that the error detector automatically syncs to the data pattern: Open the Pattern Sync Setup dialog box. Make sure that Normal Sync Mode and Automatic Sync With this setting, the error detector starts are selected.
  • Page 10 Modifying the Test Setup Adjusting the Sampling Point You can adjust the sampling point manually, for example, to test the performance of your DUT closer to the edge of the eye: Use the Decision Threshold knob to move the sampling Use the Data In Delay point vertically.
  • Page 11 Modifying the Test Setup Inserting Errors You can add a single bit error to the data stream by pressing the Error Add button. The pattern generator can also be set up to insert a specified BER in the data stream. This can, for example, be used for testing error correction algorithms.
  • Page 12 What Else You Can Do Generate Trigger Signals Both the pattern generator and the error detector can be set up to send trigger signals for different purposes. These signals can indicate various occasions like the beginning of patterns. Use Alternating Patterns Set up two different data patterns that are sent alternately or externally controlled.

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