Occasionally, some desired functions might not be available on a standard plug-in module. For those occasions, the Keysight 44475A Breadboard module provides a place for customer mounting circuits for special applications. The Keysight 44475A can be used in designing and building special functions for your system. Filters, amplifiers, and other custom circuitry can be implemented on the breadboard's grid of plated holes. The supplied documentation lets you interface your circuit directly to the Keysight 3499A/B's internal bus control signals.