407790 Datasheet, PDF (14/18 Pages) Extech Instruments Corporation. – Real Time Octave Band Analyzer

Reading from memory
1. Press the MEMORY button to access the memory mode; the display will show M
[∗∗∗∗].
2. Press the RECALL button to recall data; the display will show R [∗∗∗∗] which is the
record number and the data value in memory. If there are no data records in memory
the RECALL button will not be active.
FAST LA
dB
100
W
75.2 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. Press the 2nd button, the 2ND annunciator in the upper left of the screen will display.
4. Press the Cursor key to select the memory address of the data to be viewed.
5. In the 1/1 or 1/3 octave band screen, press the 2nd button to remove the 2nd
annunciator. Press the Cursor button; the frequency and level values for the
desired data points will display.
6. Press the 2nd button to remove the 2nd annunciator.
7. Press the RECALL button to exit the recall mode.
8. Press the MEMORY button to exit the memory mode.
14
Model 407790 Ver. 2.1 9/07