U8903A [KEYSIGHT]
M9260A PXIe Audio Analyzer Module;
| 型号： | U8903A |
| 厂家： | 
Keysight Technologies |
| 描述： | M9260A PXIe Audio Analyzer Module |
| 文件： | 总13页 (文件大小：1316K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Keysight Technologies
M9260A PXIe Audio Analyzer Module
Data Sheet
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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Pure audio signal generation
A pure or clean audio signal is defined by a signal with very low distortion and noise. One
of the common contributors to signal distortion in traditional digitizers is phase dis-
continuity. Traditional digitizers typically come with relatively small arbitrary waveform
buffers that can only house a maximum of 1K to 2K samples. For complex test signals
that exceed this capacity, usually several hundred thousand samples, the signal needs
to be ‘chopped’ up into multiple pieces and then ‘stitched back’ together to recreate the
entire waveform. The ‘stitching back’ is where phase discontinuity inevitably happens.
With the M9260A PXIe audio analyzer module, you can transmit up to 1 million samples
of signal all at once, owing to its large arbitrary waveform buffer, which avoids the issue
of distortion due to phase discontinuity.
Distortion in audio signal generation can also be caused by the non-linearity of output
amplifiers. Typically, this can be resolved by using an amplifier with a higher gain. While
a traditional digitizer module typically has only three ranges (gain of 3), the M9260A PXIe
audio analyzer module has five, resulting in an output that’s relatively more linear and
accurate. With the M9260A, you can achieve:
– THD+N (20 Hz to 20 kHz): –103 dB (≥ 1 Vp)
– THD (20 Hz to 20 kHz): –106 dB
– Amplitude accuracy: ±0.087 dB (±1%)
High-performance audio measurement
Leveraging the design of the high performance Keysight U8903B audio analyzer, the
M9260A PXIe audio analyzer module provides reliable audio measurement capabilities
that matches its pure signal generation.
– Amplitude accuracy: ±0.58% for AC, ±1% for DC
– Low input residual distortion and noise: –95 dB @1 kHz, 20 Hz to 20 kHz BW
– Residual THD: –101 dB @1 kHz, 20 Hz to 20 kHz BW
– Max input amplitude: 46 Vp
– Flatness: ±0.08 dB (20 Hz to 88 kHz BW, ≤ 10 Vp)
– Ultra-low crosstalk for multi-channel measurement: –123 dB (20 kHz BW)
04 | Keysight | M9260A PXIe Audio Analyzer Module – Data Sheet
High-speed production testing
In high-throughput production testing, speed is critical. The M9260A PXIe audio analyzer module is designed to optimize
testing speed in two ways: fast signal generation and fast signal analysis. Figure 1 illustrates the blocks within the M9260A
that define its unique high-throughput capability.
Fast audio signal generation
There are two ways for a signal to be generated by the M9260A. The first method is to have the test signal created via the
PC software and then loaded to the M9260A arbitrary waveform buffer. The M9260A PXI module then generates the test
signal according to the arbitrary waveform description, to the Device Under Test (DUT).
Large 1-million-sample arbitrary waveform buffer
Traditional digitizers typically come with relatively small arbitrary waveform buffers that can only house a maximum of 1K to
2K samples. For complex test signals that exceed this capacity, usually several hundred thousand samples, the signal needs
to be first ‘chopped’ up into multiple pieces, and then sequentially sent to the PXIe module. The total processing time can
be significantly reduced with the M9260A PXIe audio analyzer module, as it comes with a large 1-million-sample arbitrary
waveform buffer. This means you can transmit any waveform of up to 1 million samples, to the M9260A module once,
without having to face buffer and speed limitations that are common with traditional digitizers.
Built-in waveforms
In addition to the large arbitrary waveform buffer, Figure 1 also shows that the M9260A PXIe audio analyzer module comes
with built-in waveforms that speed up the signal generation process further. Commonly used waveforms that are built into
the M9260A include the sinewave, dual-sinewave, variable-phase sinewave, DC, Gaussian noise, rectangular noise and
pink noise. Having these waveforms built in means you do not need to generate the test signal with a PC software. All you
need to do is send a software command to the PXIe module and indicate which of the built-in waveforms you would like to
generate. The PXIe module then sends the signal almost immediately to the DUT, reducing significant signal generation time.
Fast audio signal analysis
For signal measurement, the M9260A receives the incoming test signal from the DUT, after which the signal goes through
signal conditioning and the analog-to-digital converter before it is sent to the input buffer where the signal ‘waits’ to be
streamed back to the PC for analysis.
Large 1-million-sample input buffer
As with its large arbitrary waveform buffer for signal generation, the M9260A PXIe audio analyzer has a large 1-million-sam-
ple input buffer, which means a virtually ‘limitless’ memory for acquisition and seamless streaming to PC. This is unlike
traditional digitizers that typically provide a smaller 1K input buffer size that limits the signal measurement capability to just
1 thousand samples at any one time. With the M9260A module, you can achieve fast audio signal acquisition and analysis
for high-speed production testing.
PXI chassis
Built-in
waveform
M9260A
Arbitrary
waveform
buffer
Waveform
generation
Device
Under Test
(DUT)
Input
Data
buffer
acquisition
PC with test
software
Figure 1. M9260A PXIe audio analyzer signal generation and acquisition building blocks
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05 | Keysight | M9260A PXIe Audio Analyzer Module – Data Sheet
Loopback and multiple impedance selection
The M9260A PXIe audio analyzer module includes built-in features that aim to provide
you with greater convenience and confidence in your audio measurement tasks. Figure 2
illustrates the loopback and multiple impedance selection within the M9260A.
Loopback: The M9260A module has a loopback from the generator to the analyzer. This
enables an automatic self-test and self-calibration of the audio analyzer module. This
avoids the need for manual calibration via an external BNC cable, which could inevitably
introduce errors due to the external connector or cable. For automated test systems, the
loopback is a critical feature as manual calibration via an external BNC cable is not an
allowed procedure.
Multiple impedance selection: Unmatched impedances can create errors in test, which is
why it is necessary to ensure exact impedance matches to the DUT. Typical digitizers do
not provide a selection of impedances – usually only one – hence you often need to use
external impedance converters to achieve the required impedance. The M9260A output
impedance selection includes the 50 Ω impedance that’s commonly used for audio devices,
and 600 Ω impedance to match legacy audio devices. The M9260A input impedance in-
cludes three selections: 50 Ω, 600 Ω, and 1 MΩ to match the output of most audio devices.
In addition to this selection, the Keysight U8903A-109 BNC accessory kit is available if you
need to convert the M9260A impedance to any other required value.
Output impedance
50Ω
600Ω
M9260A
Loopback
Generator
Input impedance
1MΩ
Analyzer
50Ω
600Ω
Figure 2. M9260A PXIe audio analyzer loopback and multiple impedance selection features
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06 | Keysight | M9260A PXIe Audio Analyzer Module – Data Sheet
The M9260A PXIe audio analyzer for your radio testing
Keysight Radio Test Solution
The M9260A PXIe audio analyzer module is a critical part of the Keysight Radio Test
Solution, specifically in the audio signal generation and analysis. The Keysight Radio Test
Solution is a combination of hardware and software building blocks in a single, scalable
chassis, aimed at providing military, public safety, and avionics radio communication
departments with reliable, quality RF and audio signal generation and analysis.
More info on the Keysight Radio Test Solution: www.keysight.com/find/solution-radiotest
Radio Test Audio Library (M9560A-1TP)
The M9560A-1TP Radio Test Audio Library provides audio analysis software components
(.NET classes) for Keysight Radio Test Solution. You can also use the M9560A-1TP for
audio signal generation and analysis in usage with the M9260A PXIe audio analyzer
module. The M9560A-1TP audio signal generation library includes pseudo-voice with
ITU-T G227 filter and baseband audio waveforms such as single tone, dual tone and
Gaussian noise. The M9560A-1TP audio signal analysis library includes audio spectrum
with selectable FFT windows, audio measurement results (THD, SINAD, SNR, max
voltage), and audio filtering (low pass, high pass, band pass and Bit Error Rate (BER).
More info on the Keysight Radio Test Audio Library: www.keysight.com/find/M9560A
Figure 3. M9560A-1TP software interface
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07 | Keysight | M9260A PXIe Audio Analyzer Module – Data Sheet
Software: Drivers and Soft Front Panel (SFP)
Included in the M9260A software installer that you can download from Keysight.com are
the IVI-C, IVI-COM and LabVIEW G drivers. Also included in the installer is the intuitive
M9260A PXIe module soft front panel (SFP) software that you can use to configure and
control the PXIe module.
SFP features:
– Module maintenance allows self-test, module reset and firmware upgrades
– Audio generator settings allow sine-wave generation, with amplitude frequency and DC
offset adjustments. You can also select differential or pseudo-differential output, and
50 Ω or 600 Ω output impedance.
– Audio analyzer settings allow loopback control, and selection of differential or pseudo-
differential input, AC or DC input coupling, and 50 Ω, 600 Ω or 1 MΩ input impedance.
– Basic audio measurements: AC voltage, DC voltage, frequency, THD+N ratio, THD ratio,
SINAD and SNR
– Filter options: 20 kHz low-pass filter, 20 Hz high-pass filter, A-weight filter or no filter
Figure 4. M9260A PXIe module soft front panel interface
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08 | Keysight | M9260A PXIe Audio Analyzer Module – Data Sheet
Product Characteristics
Description
Operating environment
Operating temperature
Storage temperature
Operating humidity
Storage humidity
0 to 55 °C
–40 to 71 °C
Up to 95% RH at 40 °C (non-condensing )
Up to 90% RH at 65 °C (non-condensing )
Up to 3000 m
Operating altitude
Non-operating altitude
Up to 4600 m
Meets or exceeds Keysight ETM requirements on class GP where
applicable. These include EMC, ESD, shock and vibration, power
tolerances from PXI chassis, etc.
Other
Form factor
Type/dimension: PXIe, 1 slot, 3U
1 year
Calibration period
Support and complies with Keysight CCE requirements for
PXI modular: IVI-COM, IVI-C, LabVIEW
Drivers
Trigger - Digital
Trigger connector
Trigger level
Polarity
SMB male
3.3 V TTL
Rising or falling edge
Trigger source
Pulse width
External trigger input (available at front panel), PXI trigger bus
Min 10 µs
Trigger - Analog
Trigger connector
Trigger level
Polarity
SMB male
±full-scale
Rising or falling edge
24 bits
Resolution
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09 | Keysight | M9260A PXIe Audio Analyzer Module – Data Sheet
Performance Specifications
The following specifications are based on performance following 30 minutes of warm-up
time and at operating temperatures between 0 °C to 55 °C, and sample rate of 192 kS/s
unless stated otherwise.
Analog Generator Specifications
Connector type
Impedance
BNC
50 Ω, 600 Ω (nom)
Differential, pseudo-differential (50 Ω connected from
negative input to chassis ground)
Input configuration
Number of output channels
Built-in waveform
2 channels per module
Sine, Dual Sine, Variable Phase, Gaussian Noise,
Rectangular Noise, Pink Noise
Dual sine amplitude ratio
Variable phase
0% to 100%
–180º to 179.99º
Sample rate (fs)
1.024 kS/s to 204.8 kS/s (363.8 μHz resolution)
Arbitrary waveform buffer
DAC resolution
Max 1,048,576 samples/download
24 bits
Max output amplitude
Output range
10 Vp
0.1 Vp, 0.316 Vp, 1 Vp, 3.16 Vp, 10 Vp in 10 dB steps
50 mA (nom)
Max output current
±1% (–0.087 dB to 0.086 dB)
±0.32% (±0.028 dB) (typ)
DC accuracy
±1% (–0.087 dB to 0.086 dB)
±0.4% (±0.035 dB) (typ)
AC accuracy @1 kHz
AC flatness (refer to 1 kHz)
5 Hz to 20 kHz BW
@0.1 Vp
±0.2500% (±0.0217 dB)
±0.1440% (±0.0125 dB) (typ)
±0.0925% (±0.008 dB)
±0.0560% (±0.0049 dB) (typ)
±0.1% (±0.0087 dB)
@0.316 Vp, 1 Vp, 3.16 Vp,
@10 Vp
±0.0560% (±0.0049 dB) (typ)
±0.9250% (–0.081 dB to 0.080 dB)
±0.64% (±0.055 dB) (typ)
20 kHz to 80 kHz BW
All ranges
Residual THD+N (@1 kHz)
20 Hz to 20 kHz BW
@0.316 V
< 0.0017% (<–95 dB)
< 0.0012% (<–98.4 dB) (typ)
< 0.0007% (<–103 dB)
@1 Vp, 3.16 Vp, 10 Vp
< 0.00056% (<–105 dB) (typ)
Residual THD (@1 kHz)
20 Hz to 20 kHz BW
@0.316 Vp, 1 Vp, 3.16 Vp, 10 Vp
< 0.0005% (<–106 dB) (typ)
< 0.00036% (<–108.9 dB) (typ)
Frequency range (fs = 192 kS/s)
Frequency accuracy
5 Hz to 79.8 kHz (up to 0.416 Fs)
±2 ppm + 100 μHz
Note: The voltage levels indicated in the specifications are at the full-scale of each respective range.
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10 | Keysight | M9260A PXIe Audio Analyzer Module – Data Sheet
Analog Analyzer Specifications
Connector type
BNC
Impedance
50 Ω, 600 Ω, 1 MΩ (nom)
AC, DC
Input coupling
Number of input channels
Sample rate
2 channels per module
1.024 kS/s to 204.8 kS/s (363.8 µHz resolution)
Max 1,048,576 samples/acquisition
24 bits
Acquisition buffer
ADC resolution
Measurement bandwidth
Max input amplitude
90 kHz @ 192 kS/s (up to 0.47 SR)
46 Vp
0.316 Vp, 1 Vp, 3.16 Vp, 10 Vp, 31.6 Vp, 46 Vp in 10 dB
steps
Input range
Overload protection for all ranges, with overload status
registers (each channel) that enables the software to be
informed of the overload status
Input protection
±1% (–0.087 dB to 0.086 dB)
±0.24% (±0.021 dB) (typ)
DC accuracy
AC accuracy
±0.58% (±0.05 dB)
±0.12% (±0.010 dB) (typ)
AC flatness (ref to 1 kHz)
10 Hz to 20 kHz BW
@0.316 Vp
±0.13% (±0.011 dB)
±0.072% (±0.0062 dB) (typ)
±0.0925% (±0.008 dB)
±0.056% (±0.0049 dB) (typ)
±0.8000% (–0.07 dB to 0.069 dB)
±0.32% (±0.0278 dB) (typ)
@1 Vp, 3.16 Vp, 10 Vp
@31.6 Vp, 46 Vp
20 Hz to 88 kHz BW
@0.316 Vp, 1 Vp, 3.16 Vp, 10 Vp
±0.9250% (–0.081 dB to 0.080 dB)
±0.520% (±0.045 dB) (typ)
@31.6 Vp, 46 Vp
±5.2000% (–0.46 dB to 0.44 dB)
±3% (–0.26 dB to 0.257 dB) (typ)
Residual THD+N (@1 kHz)
20 Hz to 20 kHz BW
@0.316 Vp
< 0.0017% (<–95 dB)
< 0.00136%(<–97 dB) (typ)
< 0.00085% (<–101 dB)
< 0.00068% (<–103.3 dB) (typ)
@1 Vp, 3.16 Vp, 10 Vp
Residual THD (@1 kHz)
20 Hz to 20 kHz BW
@0.316 Vp, 1 Vp, 3.16 Vp, 10 Vp
< 0.00085% (<–101 dB)
< 0.00048% (<–106 dB) (typ)
Residual noise (@0.316 Vp)
20 Hz to 20 kHz BW
≤ 1.3 µVrms
Note: The voltage levels indicated in the specifications are at the full-scale of each respective range.
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11 | Keysight | M9260A PXIe Audio Analyzer Module – Data Sheet
Performance Characteristics
Generator Output Characteristics
Crosstalk
100 Hz to 20 kHz
@0.316 Vp, 1 Vp, 3.16 Vp, 10 Vp
< 0.00136% (< –97.3 dB) (typ)
SMPTE IMD
≤ 20 kHz BW
< 0.002% (< –94 dB) (typ)
DFD (IEC60118 / IEC60268)
≤ 20 kHz BW
< 0.0008% (< –101.9 dB) (typ)
Phase Offset
≤ 20 kHz
20 kHz to 80 kHz
±2º (typ)
±5º (typ)
Analyzer Input Characteristics
Crosstalk
≤ 20 kHz
@0.316 Vp
@1 Vp
@3.16 Vp, 10 Vp
@31.6 Vp, 46 Vp
< 0.000064% (< –123 dB) (typ)
< 0.0000253% (< –131 dB) (typ)
< 0.0000142% (< –136 dB) (typ)
< 0.0000142% (< –136 dB) (typ)
SMPTE IMD
≤ 20 kHz BW
< 0.0036% (< –88 dB) (typ)
< 0.0008% (< –102 dB) (typ)
> 70 dB (typ)
DFD (IEC60118 / IEC60268)
≤ 20 kHz BW
CMRR
≤ 20 kHz BW, ≤ 10 Vp
Phase Accuracy (@1 Vp)
≤ 20 kHz
20 kHz to 90 kHz
±0.15° (typ)
±0.6° (typ)
Note: The voltage levels indicated in the specifications are at the full-scale of each respective range.
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12 | Keysight | M9260A PXIe Audio Analyzer Module – Data Sheet
Definitions
Specification (spec)
The warranted performance of a calibrated instrument that has been stored for a
minimum of 2 hours within the operating temperature range of 0º- 55ºC and after a
30-minute warm up period. All specifications include measurement uncertainty and
were created in compliance with ISO-17025 methods. Data published in this document
are specifications (spec) unless otherwise noted.
Typical (typ)
The characteristic performance, which 80% or more of the manufactured instruments
will meet. This data is not warranted, does not include measurement uncertainty, and is
valid only at room temperature (approximately 23ºC).
Nominal (nom)
The mean or average characteristic performance, or the value of an attribute that
is determined by design such as a connector type, connector impedance, physical
dimension, or operating speed. This data is not warranted and is measured at room
temperature (approximately 23ºC).
Ordering Information
Product Model
M9260A-STD
M9260A-UDF
Optional Accessories
U8903A-101
Description
PXIe audio analyzer, 2 channels
PXIe audio analyzer for US Defense Force, 2 channels
Description
Male BNC to male BNC cable, 1.2 m, jade gray
Male BNC to male RCA cable, 2 m, black
BNC accessory kit
U8903A-102
U8903A-109
M9260A-101
Trigger cable, 1 m SMB female to BNC male, 50 Ω
Trigger cable, 1 m SMB female to BNC female, 50 Ω
Description
M9260A-102
Warranty and Service
M9260A-1A7
Calibration + Uncertainties + Guardbanding (not accredited)
ANSI Z540-1-1994 calibration
M9260A-A6J
Related Products
Product Model
U8903B
Description
Performance audio analyzer, 2 channels
Audio analyzer, 2 channels, discontinued on December 31, 2016
U8903A
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13 | Keysight | M9260A PXIe Audio Analyzer Module – Data Sheet
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ISO9001 Quality Management System
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This information is subject to change without notice.
© Keysight Technologies, 2017
Published in USA, December 21, 2017
5992-1918EN
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