407790 Datasheet, PDF (7/18 Pages) Extech Instruments Corporation. – Real Time Octave Band Analyzer

Measurement Screens
1. Sound pressure level measurement screen
FAST
LA
30
80
dB
130
[ SLM ] 01 / 07 / 27 14:26:39
2. 1/1-octave analysis screen
The staircase shape on the display represents the 1/1-octave analysis result. From left,
the bars correspond to 31.5, 63, 125, 250, 500, 1k, 2k, 4k, 8kHz. To read the levels at
these frequencies, use the Cursor key to move the cursor to the desired point.
The frequency and level are then shown on the upper of the screen.
FAST LA
dB
100
2k Hz 68.4 dB
90
80
70
60
50
40
30
Hz 31.5 125 500 2k
8k L W
[ 1 / 1 OCT ] 01 / 07 / 27 14:26:39
3. 1/3-octave analysis screen
The staircase shape on the display represents the 1/3-octave analysis result. From left,
the bars correspond to 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500,
630, 800, 1k, 1.25k, 1.6k, 2k, 2.5k, 3.15k, 4k, 5k, 6.3k, 8k, 10kHz. To read the levels at
these frequencies, use the Cursor key to move the cursor to the desired point.
The frequency and level are then shown on the upper of the screen.
7
Model 407790 Ver. 2.1 9/07