Manual

3.93.9
3.93.9
3.9
1/31/3
1/31/3
1/3
rdrd
rdrd
rd
Octave RMS Octave RMS
Octave RMS Octave RMS
Octave RMS
The 1/3
rd
OCTAVE RMS screen shows the signal frequency spectrum of
the line-in signal, divided into 31 bands.
To enter the 1/3
rd
OCTAVE RMS mode (Fig 23), select 1/3
rd
OCT. -> RMS
in the measurement functions submenu.
Arrow Readout: The arrow readout displays the frequency and the level
of the 1/3
rd
octave band that it points to. The arrow automatically
points to the highest level in the 1/3
rd
octave spectrum, or, alternatively
may be controlled manually.
Arrow Mode: The arrow readout may be moved manually to a certain
specific 1/3
rd
octave band.
• Select the arrow mode field and press the enter key.
• Move the arrow to any frequency by using the left/right keys.
Run/Pause: The 1/3
rd
octave spectrum may be freezed.
• Select the run/pause field and press the enter key.
• The1/3
rd
octave spectrum is freezed.
• The arrow mode or zoom symbol may be selected for the detailed
read out of the 1/3
rd
octave spectrum.
• At selecting any other field the measurement will be continued.
• Press the enter key again to continue the measurement.
3-17
Measurement Functions
Fig 23 1/3
rd
Octave RMS Screen
A dialog box will open (Fig 22)
on the graph, where the
sweep duration (min. 60 sec -
max. battery lifetime) and the
recording interval (≥ 1 sec)
have to be entered. Please
note that the number of
samples must be between 60
- 1600.
• To start the sweep recording, move the cursor to the GO! field
and press enter.
• The time sweep automatically stops when the defined duration
has expired. Alternatively, the sweep may be stopped manually
by pressing enter with the cursor on the REC field.
• To display the mean or the min-max values of the recorded sweep,
place the cursor to the corresponding field and select the required
mode by using the enter and the arrow keys.
• In order to analyze the sampled curve more detailed, activate the
arrow mode by placing the cursor to the corresponding symbol
and pressing the enter key. Move the readout line to the sample(s)
of interest by using the left / right keys, or press the up/down keys
to zoom out/in the X-axis.
• To zoom in/out the Y-axis, move the cursor to the zoom mode
field, press enter and
- use the up/down keys to zoom out/in the Y-axis
- use the left/right keys to scroll through the Y-axis.
The last time sweep recording will be stored internally, even after leaving
the sweep mode or switching off the Minilyzer. As soon as the time
sweep mode is re-entered, the last displayed curve will appear on the
graph, until a new time sweep recording is started.
NOTES • As soon as the sweep mode is entered, the filter
that has been active during the recording of the
last curve will be re-activated.
• If a running time sweep is stopped due to empty
batteries, the recorded data will not be lost.
• The auto power off is disabled during a time sweep.
Fig 22 Time Sweep Setup
Measurement Functions
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