02 | Keysight | M9260A PXIe Audio Analyzer Module – Data Sheet
What is an audio analyzer?
An audio analyzer is a test and measurement instrument that is used to quantify the
audio quality of electronic and electro-acoustical devices, including but not limited to
the following:
– Radio
– Mobile phone
– Bluetooth® audio device
– Broadcasting system
– Home theater
– Speaker
– Microphone
– ADC/DAC
– Audio/Low-frequency amplifier
– Automotive infotainment system
– Hearing aid
Typically, audio quality metrics comprise the level gain, total harmonic distortion (THD),
total harmonic distortion plus noise (THD+N), crosstalk, relative phase of signals and
frequency response, among others.
The two important characteristics in the selection of an audio analyzer:
– Test speed: How fast can the audio analyzer test multiple device under tests (DUTs)
in the production line?
– Purity of signal generation: How certain are you that the signal received by the DUT
is the signal generated by the audio analyzer?
The M9260A PXIe audio analyzer is not your traditional
digitizer
The Keysight Technologies, Inc. M9260A PXIe audio analyzer module is designed for fast,
high-performance audio measurement, unlike traditional general-purpose digitizers.
The M9260A build includes two audio generator channels and two audio analyzer
channels in a single 3U height PXIe module.
Key features that make the M9260A uniquely fast and accurate include:
– Large 1-million-sample arbitrary waveform buffer that speeds up signal
generation
– Large 1-million-sample input buffer that speeds up signal acquisition and analysis
– Gain of 5 amplifiers that increase signal sensitivity, leading to accurate replication of
signals to and from the DUT
– Super-linear, low-noise analog-to-digital converters (ADC) and digital-to-analog
converters (DAC)
– Signal generation with ultra-low residual distortion of -106 dB and 1% amplitude
accuracy
Additional built-in features of the M9260A PXIe audio analyzer that make it a worthy
investment:
– Built-in loopback system helps with self-calibration of the “generator” and
“analyzer” blocks, hence ensuring the quality and accuracy of signal used for test
– Built-in multiple impedance selection allows convenient impedance matching to
avoid errors due to mismatched impedances in the test system
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