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User's Guide
ADI-96 PRO © RME
11.4 Settings Spectrum Analyser
Type
Number and Quality factor of displayed bands. Available are:
•
10 band (1/1 oct. steps), Quality factor 1.4 or 2.5
•
15 band (2/3 oct. steps), Quality factor 1.4 or 3
•
20 band (1/2 oct. steps), Quality factor 3 or 5
•
30 band (1/3 oct. steps), Quality factor 3 or 5
The width of the display window is automatically adjusted to the number of of bands. The val-
ues printed on the x-axis are rounded for better readability. At a sample rate of 32 kHz the band
20 kHz isn't available, as no frequencies above 16 kHz are sampled. The choice of Quality
factor defines the crosstalk between the bands.
Source
Sets the channel to be displayed. Adjustable to left, right, left plus right (monaural) and left
minus right (only stereo).
Rise Time
Rise time of the display, adjustable from 0 ms to 200 ms. Values below 5 ms lead to a display
even of shortest peaks. Values around 7 ms will lead to a display which behaves more like the
audio heard. Values greater than 30 ms result in a display similar to a VU meter.
Release
Release time of the display, referenced to 20 dB. Adjustable from 0,3 s to 20 s. A good read-
able display is achieved at around 2 seconds. When measuring using noise signals 20 seconds
result in a smooth and well readable display.
Hold Time
Hold time of the optional peak level meter (mode
Peak Hold
), adjustable from 0.1 s to 9.9 s.
Range
Visible display range. Choose between 30 dB and 50 dB.
Top Level
Highest level displayed in the analyser window. Serves to adapt the display to the actual signal
level. Available settings are 0 up to -70 dB in steps of 10 dB.
Mode
Kind of display.
Bar
shows a solid bar,
Point
only one LED/segment per band.
Peak Hold
com-
bines bar and peak display. The peak portion is defined by
Hold Time
.
Size
Size of the analyser window. Choose between small, medium and big.
Resolution
Range in dB per LED/segment. Choose between 0.5 dB, 1 dB and 2 dB.
Instant Hold
Sets the release time in
Bar
and
Point
mode to infinite. In mode
Peak Hold
only the peak dis-
play will be set to infinite release.
Reset
Resets all peak values covered by
Hold Time
or
Instant Hold
.
Freeze
Freezes the display to the actual state. Snap shot function.
