PDM
Pulse Density Modulation (PDM) stands as a prominent digital signal modulation technique widely employed in the digitization and transmission of audio signals. This modulation method serves as an effective means of representing analog signals through a bitstream, particularly in applications related to microphone audio transmission. Operating within a voltage range of 1.8 to 3.3 volts, PDM has become a pivotal technology in the realm of audio processing, providing a robust solution for capturing and transmitting high-quality audio data in various electronic devices.
Application: PDM is a form of modulation used to represent an analog signal with a bitstream. Usually for microphone audio transmission.
Logic Analyzer / MSO
| TB3016F | MSO2116E (w/ analog channels) | MSO3124V (w/ electrical validation) |
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| TB3000 series Specifications PDF | MSO2000 series Specifications PDF | MSO3000 series Specifications PDF |
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| Model | TB3016F | MSO2116E | MSO3124V |
| Decode / Trigger | y | y | y |
| Analog Channels | y | y | |
| Electrical Validation | y |
Normal Mode
Audio
Save as TXT/CSV
In Logic Analyzer mode, click the icon above the report area to save the decoded data as a TXT/CSV file. |
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PDM Electrical Validation
Use an oscilloscope for PDM electrical validation to ensure compliance with defined specifications. After an extended burn-in test, the oscilloscope confirms that the electrical characteristics of the signal meet the required standards.
Supported Models: TS3124V (4-channel DSO), MSO3124V (4-channel DSO + 16-channel LA)
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Electrical Validation Solution PDF |
PDM Decoding Setup Steps1. Click Quick Settings or Add Protocol Decode to select a protocol for logic analyzer capture. 2. Select PDM for decoding. 3. If you use Quick Settings, the system will recommend configurations for trigger type, sampling rate, voltage threshold, and channel settings. 4. Click the icon to access the Decode Settings screen |
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Decode SettingsChannel: Clk & Data source Mono & Stereo: Audio mono or stereo selection PDM Sample Rate: PDM clock speed Decimation Parameter: Calculation parameter for PDM to PCM Audio Frequency: PCM audio frequency Sound Reduction: Audio display, play & save as .WAV |
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