Digilent Analog Discovery User manual
Analog Discovery Audio Adapter Reference Manual
The Analog Discovery Audio Adapter is a module that allows analyzing audio signals
from external sources or from the Analog Discovery audio jack socket. It is equipped
with a Mono and a Mono/Stereo Jack connector that are connected to the inputs of the
oscilloscope. The Audio Adapter is equipped with the 2×15 Analog Discovery connector,
which makes it compatible with Analog Discovery Legacy and Analog Discovery 2. An
additional 2×15 Analog Discovery connector is loaded as a pass through for the digital
signals that can be further used for other applications.
Overview
Features
Mono and Mono/Stereo Jack connectors
Selection Jumper
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Pass through Connector for the Digital I/O Signals
Compatible with the Analog Discovery 2 and Analog Discovery (Legacy)
Compatible Products
The Analog Discovery Audio Adapter is compatible with the following:
Analog Discovery 2
Analog Discovery (Legacy)
About this Document
This reference manual applies to Revision B of the Analog Discovery Audio Adapter.
Functional Description
Connectors and Jumpers
Label Name Description
J1 2×15 Analog
Discovery
connector
Interfaces the Audio Adapter with the Analog Discovery
J2 2×15 Analog
Discovery
connector
Used for passing through the unused signals of the
Analog Discovery
J3 Mono/Stereo Jack
connector
Used to connect a mono or a stereo audio source to
the inputs of the Analog Discovery scope
J4 Mono Jack
connector
Used to connect a mono audio source to the inputs of
the Analog Discovery scope
JP1 Mono/Stereo
Selection Jumper
Used to select if through J3 will pass a mono or stereo
signal
Visualizing the Audio Signals
The Analog Discovery Audio Adapter is used to analyze the audio signals taken from an
external source or from the Analog Discovery. It uses the Oscilloscope device
instrument. If the audio signals are generated by the Analog Discovery, a 3.5mm male
jack stereo cable needs to be connected to the stereo input of the audio adapter. The
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Wavegen of the Analog Discovery is not directly connected to the adapter. The adapter
can process stereo audio signals from the Analog Discovery or from external sources. It
can also be used for analyzing mono audio signals fro external sources.
The Mono and Mono/Stereo measuring functions are implemented as in the circuits
below:
Mono/Stereo connector (J3) can be used to see mono or stereo inputs. In order to select
the mode for the oscilloscope, JP1 should be placed in the desired mode.
Stereo Mode
In stereo mode the signals from the connector are routed to Scope1+ and Scope2+ of
the Analog Discovery. Scope1- and Scope2- are connected to the ground. In this mode,
each audio channel corresponds to a scope channel.
Mono Mode
By selecting the mode Mono on JP1, the audio channel will be routed to Scope1+. As the
Jack connector is stereo, the second signal contact will be connected to the ground.
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Mono connector (J4) can be used to see mono inputs. Paired with the Mono/Stereo
connector in Mono mode, gives access to two individual mono channels. The audio
channel is routed to Scope2+.
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Warning: Please be careful when connecting a stereo audio source into the mono
connectors as it will short the second channel to ground. This may lead to damaging
your audio equipment if it's not protected.
Power
The device doesn't require any external power supply.
Software Support
The Analog Discovery Audio Adapter is controlled with the Analog Discovery through
the use of WaveForms.
Additional Information
WaveForms can be downloaded from the WaveForms Resource Center.
Documentation and installation instructions can be found in the WaveForms
Reference Manual.
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