BAT BATmode 2S User Manual page 67

58 USER MANUAL BATMODE 2S/2S+ SYSTEM
Since the file "reference.txt" at the specified monitoring directory is evaluated to create the plot, not
only data from the current acoustical monitoring are incorporated in the figure. In addition, data from
past monitorings may be shown in the plot, if data was not deleted.
4.2.4.2 Spectrograms
This representation (see Figure 36) allows you to calculate the spectrograms of the recorded files. In
the lower half of the screen, the recorded files are listed separately by measuring channel. Double-
click on the respective list entry to display the file as a spectrogram in the upper half of the screen. The
following parameters are used to calculate the spectrograms:
Use the arrow keys on the keyboard to navigate through the file lists. Press the left or right arrow key
to calculate the spectrogram of the previous or next file.
To zoom, use the left mouse button to stretch a frame over the image area to be enlarged. By pressing
the right mouse button, you return to the overall representation of the file.
•
Window width: 512 samples
•
Window function: Hamming
•
Overlap: 50%
Figure 36: Evaluation Page – Spectrograms