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Agilent N4903B J-BERT 2 Channels 12.5 Gb/s Powers On, Needs Repair - Parts

Current Stock:

Product Description

Manufacturer: Agilent

Model: N4903B

Condition: For Parts or Not Working. Comes in non-original packaging.  This BERT is in Fair cosmetic condition with blemishes from prior use.  There are HEAVY dents on top, as well as scuffs/scratches and adhesive label residues from prior use.  There are a couple of scratches on the touch screen.  The P2 connector on the J20 module is bent a little sideways.  One of the knobs on the front panel is a little torn.  This BERT came to us with a note from the previous owner, "no money to repair".  Keysight evaluated the unit and said it needed repair; the previous owner didn't like the cost to repair, so they got rid of it.
The photos show the exact item(s) the buyer will receive.

Notes: This system is in at-least-PARTIAL working condition.  We are not experts in the use of this equipment, and are not able to perform full tests.  The tester powers on and loads the instrument software.  It passes its self-tests.  The touch screen works.  The Agilent Recovery tool was used to reset the PC to original configuration, to remove the previous owner's information completely.  The fans run.  No other testing was done.
No manuals, cords/cables, or additional items are included if not listed or shown.


  • (1) Agilent N4903B J-BERT


  • Manufacturer: Agilent Technologies
  • Model: N4903B
  • J-BERT high-performance serial BERT
  • Most complete jitter tolerance test for embedded and forwarded clock devices
  • Ideal for characterizing and stressing chips and transceiver modules
  • Data rate from 150 to 12.5 Gb/s
  • Second output channel
  • Built-in tunable CDR
  • Operating system: Windows XP
  • Options listed on the label: UAB, C13, 003, A01, J10, J11, J12
  • Options listed in the software:
    • A01 Bit Recovery Mode
    • J11 SSC Generation
    • J12 Automated Jitter Compliance
    • CTR Tunable CDR
    • 003 Half Rate Clocking
    • J10 Jitter Sources
  • Installed module: N4903-69531 Option J20 Interference Channel
  • With IEEE-488 GPIB interface
  • Power requirement: 100-240V 47-63Hz 450VA
  • NOT working!  Sold AS-IS!

Needs repair, partially functional, please read!


  • No returns - No refunds - No exchanges
  • By purchasing this item, you are agreeing to not seek reimbursement should the item not function to the manufacturer's specifications.
  • Read the notes carefully to ensure you are buying something you can use
  • See complete terms

CDN Systems LLC, DBA Doug Deals, is not an authorized distributor or affiliated with the manufacturer of this product. Original manufacturer's warranty does not apply.

Other Details

For Parts or Not Working

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