APx-PDM-16 input module

PDM 16 is an optional interface module for the APx555, APx52x Series or APx58x Series audio analyzers. Comprised of the input module installed in the analyzer, a remote interface pod and an extension cable, the module provides sample-accurate inter-channel phase information, critical data for the creation of MEMS mic arrays. Developers of systems using beamforming microphone arrays and other DSP-based multichannel audio acquisition applications depend on a true representation of phase alignment of the input channels to validate their algorithms and designs. PDM 16 utilizes synchronous sampling based on a common clock, thereby assuring a clear picture of the phase relationship between channels.

With its acoustically-silent remote pod and extension cable preserving PDM signal integrity for up to 10 meters, PDM 16 readily supports microphone measurements in anechoic chambers. As an added feature, the module can provide up to 50 mA Vdd power supply to the device, or devices, under test.