B&K Precision 732A - Manual - Manual (Page 15)

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3.If the connection is successful the panel will display the same value as the
Sound Level Meter. If it failed to connect the meter with the PC, it will
display "No Connection" on the panel window in TestLink AK –73X.
4.When the connection is successful, click to start recording real time data
and there will be a waveform on the Real Time Graph Window.
5.Click to start recording.
(2.) How to save the recorded real time data to a file?
1.Click on the graph window you want to save and the graph window will
become active, then choose File | Save from main menu or click from
the tool bar.
2. There will be a save dialog window for you to choose the file name and file
type to save. There are three types of file names you can choose, binary file
(*.ghf), text file (*.txt) and EXCEL format file (*.csv). The *.ghf file use much
fewer disk space to save the data than the other two file format, but it can
only be used in TestLink AK-73X. Text file can be opened by TestLink
AK-73X and any other word processor program like word, notepad etc.
EXCEL format file can be opened by TestLink AK-73X and Microsoft
EXCEL.