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Agilent N4903B J-BERT High Performance Serial BERT with J20 Cant Calibrate-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.  One of the knobs on the front panel is a little torn.  This BERT came to us with a note from the previous owner, "Could not calibrate from Keysight, returned un-serviced".
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 powered on and loaded Windows, and started trying to load the BERT software, but failed with an error message saying to try again to start it manually.  We started the software from Windows' start menu and it succeeded.  An error dialog appeared and kept adding items, and it would keep coming back up again if closed.  The BERT passes its self-tests. The touch screen works and 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 labels: UAB, C13, A01, J10, J11, J20, UA2
  • Options described in the software:
    • J10 Jitter Sources
    • A01 Bit Recovery Mode
    • J11 SSC Generation
    • CTR Tunable CDR
    • A02 SER FER Analysis
  • Options listed in About screen: C13, J12, A01, J11, CTR, A02, J20
  • Installed module: N4903-69531 Option J20 Interference Channel
  • With IEEE-488 GPIB interface
  • Power requirement: 100-240V 47-63Hz 450VA
  • Can't Calibrate, Needs Repair!  Sold AS-IS!

Returned from calibration lab "could not calibrate" SOLD AS-IS!


  • 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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