DK Digital CDB-600 Specifikace stáhnout pdf (Strana 45)

MSD Software Manual PRELIMINARY Release Chapter 11 1/3 Octave Spectrum Analyser.

11 1/3 Octave Spectrum Analyser.

The 1/3 Octave Analyser with 'Track' activated. (Section 11.1.2)

In the analysis of sound, it has always been important to describe the

frequency content of a signal. Traditionally, this has been done using a filter

bank containing a number of filters with relative bandwidths, for example 1/3

Octave. The signal being filtered passes through one filter at a time. Once the

signal for a filter has been detected and its value determined, then the next

filter is reviewed.

The left most bar on the 1/3 Octave Analyser (blue) is an input level indicator

for the Analyser. Since the Input signal contains the energy from the entire 30

band combined, this bar will normally show a higher value than any of the

separate 1/3 Octave bands.

To separate the individual bands easier, the 1kHz band has been coloured

yellow.

Please refer to section 10.1 'Routing Audio to the Analyser Applications.' for

details about selecting the source signal for the Analyser in the Audio Matrix.

11.1 Ballistic Setup for the 1/3 Octave Analyser. 

To obtain improved flexibility of the 30 band 1/3 Octave Analyser it is possible

to adjust several of the Meter Ballistics. As well as the Meter Response time it

is also possible to set the Meter Peak/Hold functions.

To alter the ballistics of the Analyser enter the [SETUP] Menu from the ‘1/3

Octave Base Menu’.

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DK Digital CDB-600 Specifikace Strana 45