Measurement Screens - Extech Instruments 407790 User Manual

Measurement Screens

1. Sound pressure level measurement screen
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
The frequency and level are then shown on the upper of the screen.
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
The frequency and level are then shown on the upper of the screen.
FAST
L
A
30
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Cursor key to move the cursor to the desired point.
FAST
L
A
dB
100
90
80
70
60
50
40
30
Hz 31.5 125 500
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Cursor key to move the cursor to the desired point.
80 130
2k Hz 68.4 dB
2k 8k L W
7
dB
Model 407790 Ver. 1.1 7/02L