User`s manual

MSD100 Series - User’s Manual
4.10.2 CONSUMER DECODING MODE
The Bitstream Status display can also be used for decod-
ing information from consumer-grade sources, using the
protocol for Sony Philips Digital Interface S/PDIF) or
IEC958. Although the structure of the stream is similar to
AES/EBU, there are a number of important differences:
• Audio or data state
• Copyright or non-copyright protection
• No emphasis or 50/15 µs emphasis
• 2 or 4-channel audio
• Device
o Laser/optical
o Signal processor
o Magnetic tape or disk
o Digital audio broadcast
o Music instrument, microphone or other digital
source
4.10.3 DISPLAYING CHANNEL INFORMATION
To display the Channel A information, press [A DATA].
To display the Channel B information, press the same key
again.
To return to the main menu, press the same key again.
4.11 Spectrum Analysers
The FFT and 1/3 Octave Spectrum Analysers, used for
determining frequency content of a signal, are included in
the following MSD100 models:
• MSD100T/SA
• MSD100AES/SA
The FFT-analyser is used as an accurate measuring tool,
the 1/3-octave analyser shows the energy distribution of
the signal.
4.11.1 FFT Spectrum Analyser
The FFT Analyser uses a complex Fast Fourier Transform
(FFT) algorithm that outperforms earlier analogue counter-
parts in the number of frequency bands and indication
range.
This analyser uses a 1024-band FFT algorithm to display
the signal content between 44Hz and 20kHz, covering the
dynamic range from –70 to +10dBu. These improvements
make it possible to analyse frequency response, noise,
and intermodulation (IM) distortion with much greater
accuracy.
23