Discovery BNC Adapter Reference Manual

The Discovery BNC adapter board is intended to be used with Digilent's Analog Discovery tool to enable the use of standard BNC terminated test leads and probes. The adapter board enables the user to AC couple or DC couple single-ended signals to the oscilloscope in the Analog Discovery 3 or Analog Discovery 2.

• Standard BNC interface to single-ended BNC terminated test leads and oscilloscope probes.
• Selectable AC and DC coupling to oscilloscope probes.
• Selectable 50-ohm or 0-ohm output impedance on Arbitrary Waveform Generator (AWG) channels.
• Increased oscilloscope bandwidth of up to 50 MHz when used with Digilent BNC probe

The PCB of the BNC Adapter is 6.0 cm (2.36 inches) per side.

The Discovery BNC adapter board has BNC terminations to each of the two oscilloscope channels on the Analog Discovery. Each channel of the oscilloscope can be selected as AC or DC coupled by adjusting the jumper that is located behind that channel's BNC input connector. Note that the negative inputs for both oscilloscope channels are tied to ground, creating single ended inputs with the BNC Adapter board.

The two AWG channels are equipped with BNC terminations for use with BNC style test leads. Each of the two channels can have either the 50Ω or the 0Ω termination selected. This enables the user to match the Analog Discovery's output impedance with either standard 50-ohm test leads or to be directly tied to the lead.

All the remaining signals from the Analog Discovery pass through the adapter to a female header located on the outer edge of the board.