Atec Agilent-U8903A - Manual (Page 3)

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Measure and analyze essential
audio parameters
With the U8903A, you can measure
below, across, and above the audio
spectrum with its 10 Hz to 100 kHz
frequency range and built-in DC mea-
surements. Its dual input channels let
you perform stereo audio, frequency
response, wireless and component
tests—all at a single-channel price.
Easily characterize parameters such
as signal-to-noise ratio, SINAD,
intermodulation distortion (IMD),
different-frequency distortion (DFD),
total harmonic distortion (THD+N
ratio, THD+N level), crosstalk, and
more. Additional measurement
capabilities include AC level, DC level,
frequency count, frequency spectrum,
and FFT analysis (Figure 2).
For all measurements, you can
apply weighting functions as well as
low-pass, high-pass, and standard
Figure 2. Perform FFT analysis with up to
32 Kpoints and a wide selection of
informative graphing functions Figure 3. Apply an extensive selection of
filters, including a variety of weighting
functions
Figure 4. Utilize high-quality test signals that provide low distortion and low noise level Figure 5. 2 in 1 screen generator and
analyzer in the same display screen
Address Challenging Audio Applications
filters (Figure 3). You can also create
custom filters using MATLAB
® and
other applications, and upload them
through the analyzer’s USB port.
Filters and weighting functions can be
applied one, two, or three at a time.
U8903A also provides a 2 in 1 screen,
which simultaneously displays the
generator and analyzer information
(Figure 5). This allows the user to
change the generator (source) setting
while monitoring the analyzer results
in real time.
Generate high-quality test
signals
The built-in, dual-channel signal gen-
erator lets you stimulate your device
with a variety of high-quality signals:
sine (–105 dB noise floor), square,
rectangular, noise (Gaussian and
rectangular), two-tone, and multi-tone
(up to 60) (Figure 4). To simulate com-
plex and real-world signals, you can
also create arbitrary waveforms with
up to 16,384 points and at 312.5 kHz
sampling rate.
The output voltage range is 0 V to
8 V
rms
with 1% accuracy. For unbal-
anced connections, you can select
50 or 600 Ω output impedance.
Easily perform manual and
automated tests
One-button access makes it easy
to select the four main operating
modes: analyzer, generator, graph,
and sweep. The 5.7-inch color display
provides numeric readouts as well as
graphical views of analog sweeps,
FFT spectra, and more.
For PC-based control on the bench
or in a test system, the U8903A
includes GPIB, LAN/LXI C, and USB
interfaces.