A2 /A2-D Audio Measurement System For Analog & Digital Analysis
A2 /A2-D Audio Measurement System For Analog & Digital Analysis
A2 /A2-D Audio Measurement System For Analog & Digital Analysis
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The leading instrument for <strong>Analog</strong> & <strong>Digital</strong> <strong>Audio</strong><br />
Input Section<br />
Display Modes<br />
<strong>Measurement</strong><br />
Functions<br />
Filters<br />
Output Section<br />
Front Panel <strong>A2</strong><br />
Display Section<br />
Generator Controil<br />
The input levels are continuously<br />
measured and displayed for both<br />
channels. A very fast peak ranging<br />
circuitry adjusts gain automatically<br />
for lowest noise and distortion.<br />
A 400Hz high pass, 22Hz - 22kHz<br />
band pass, CCIR 468 noise<br />
weighting filter as well as the W&F<br />
weighting filters are included as<br />
standards. Sockets are provided for<br />
four additional weighting filters (two<br />
per channel).<br />
<strong>Analog</strong> Functions<br />
In order to speed up tests, the<br />
comprehensive analog analyzer<br />
section of the <strong>A2</strong> and the <strong>A2</strong>-D<br />
provide simultaneous two channel<br />
measurements for<br />
- Level - Level-ratio<br />
- Crosstalk - Phase<br />
- Frequency - Scope<br />
and fully automatic<br />
- Total Harmonic Dist. (THD+N)<br />
- Noise<br />
- Wow & Flutter<br />
- Drift<br />
- Intermodulation Distortion<br />
- Narrow Band Selective Level<br />
- Spectral FFT <strong>Analysis</strong><br />
All functions are available in linear<br />
or logarithmic units in absolute and<br />
relative terms.<br />
The two channel digital storage<br />
oscilloscope is self triggering, autoscaling<br />
and -ranging, equipped with<br />
a time-base optimizing algorithm.<br />
Thus no adjustments are required<br />
to obtain a display of the signal<br />
wavefrom. A “Store” function allows<br />
freezing the scope screen.<br />
Monitoring<br />
The built-in speaker and headphone<br />
jack with adjustable volume allow<br />
monitoring the analog and digital<br />
audio signals. Three additional<br />
BNC-type outputs are provided;<br />
one each for the auto-ranged input<br />
signals and one for the reading<br />
output, representing the processed<br />
signal right before the rectifiers (e.g.<br />
residuals in THD).<br />
<strong>Digital</strong> Functions (<strong>A2</strong>-D)<br />
An innovative digital interface<br />
option supports measurements in<br />
a digital signal environment, where<br />
connectivity problems like emphasis,<br />
sampling rates, consumer/professional<br />
formats occur regularly.<br />
page 4 of 8<br />
The interface acts as a problem<br />
solver allowing the analysis of<br />
the bitstream in the two standard<br />
formats, - AES/EBU and IEC958<br />
(SPDIF). AES/EBU can - for easiest<br />
operation - be directly fed into the<br />
front XLR connectors. No matter<br />
what the signal type is, the smart<br />
input stage automatically detects<br />
the signal type and switches into the<br />
appropriate analysis mode.<br />
In addition RCA and optical TOS link<br />
connectors for input and output of<br />
SPDIF signals are provided at the<br />
back of the instrument.<br />
Regardless of the selected source,<br />
the available analysis functions are<br />
- Carrier Level - Sampling Freq.<br />
- Jitter <strong>Analysis</strong> - Peak Level<br />
- Bit Statistics - Status <strong>Analysis</strong><br />
With the internal high performance<br />
D/A converter it is furthermore<br />
possible to perform analog analysis<br />
of the digital signal<br />
- Total Harmonic Dist. (THD+N)<br />
- RMS Level<br />
- Monitoring (speaker & headphone)