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N4956A 12.5 Gb/s Error Detector Remote Head

Product Status: Discontinued | Currently Supported
This product is no longer available

A replacement for this product is available:

Key Features & Specifications


  • 1 to 12.5 Gb/s Error Detector remote head
  • Programmable detector input parameters
  • BER bathtub and jitter tolerance testing with N4980A
  • Remote head allows placement of signal very close to DUT



The N4956A is an affordable and compact error detector remote head that is compatible with the N4965A Serial BERT controller. The N4956A is an ideal solution to test up to 12.5 Gb/s per channel for characterizing multi-lane serial data channels. The N4956A error detector supports PRBS patterns and operates up to 12.5 Gb/s with differential or single-ended connections. The remote head allows the test equipment to be located very close to the device under test, eliminating the need for long cables that degrade signal quality.


  • Serial data receiver characterization up to 12.5 Gb/s
  • Multi-lane device characterization
  • Crosstalk characterization