2
Tempus-3D
Getting Started
Once the Tempus program is installed on
your computer, the two portions of the
program need to be set up to run together.
The Tempus program really consists of two
programs; the TEMPUS portion does the
analysis and the TEMPUS-3D portion does
the graphical display. (Throughout this
manual Tempus refers to the program in its
entirety, TEMPUS refers to the portion of
the program that does the analysis and
TEMPUS-3D refers to the graphical display
part of the program.) These two programs
are automatically linked at startup. If
changes are made to the locations of the
two programs, then they will need to be
linked in order for the program as a whole
to function properly.
User Interface
The Tempus program user interface is
organized to be consistent with the Win-
dows platform. In TEMPUS, the top of the
screen has the familiar menu bar and
toolbar. TEMPUS-3D has a menu bar and
the option of displaying a toolbar, a dia-
logue bar, and a status bar.
The TEMPUS menu bar consists of the File
Menu, the Options Menu, and the Help
Menu. The toolbar contains shortcut but-
tons for the most common selections from
the file menu and the links to the TEMPUS-
3D portion of the program—the graphical
display.
The TEMPUS-3D menu bar includes a the
File menu, a View menu (for displaying or
hiding the different bars), and a Help menu.
The Toolbar is standard, containing short-
cut buttons for common functions. The
Dialogue bar contains buttons that execute
various commands that manipulate the
three-dimensional display. These com-
mands will be covered in detail later in this
text. The Status Bar notes the channel being
displayed, the sampling rate of the signal
being examined, and the octave used to
analyze the signal.
Using TEMPUS
Tempus uses the popular .WAV file as a
source of data. It allows the user to choose
from three bandwidths: 1/12 th octave, 1/6
th octave, and 1/3 rd octave. These choices
let the user determine whether the results
will have high definition in frequency (1/12
th octave), high definition in time (1/3 rd
octave), or a balance between the two (1/6
th octave). The TEMPUS programs are
designed so that the different analysis
bandwidths can be compared with each
other by retaining the same analysis win-
dow widths, regardless of the bandwidth
chosen.
This program can analyze signals with
sampling rates from 8 kHz up to more than
44 kHz. If the sampling rate of a signal is
less then 8 kHz, the program will return an
error when you click on the analyze button.
Also note that the bandwidth and time
window are set automatically as different
sampling rates are used for the .WAV file.
Sampling Maximum Window
Rate Analysis Freq. Width
8 to 16 KHz 4 KHz 240 mS
16 to 32 KHz 8 KHz 120 mS
above 32 KHz 16 KHz 60 mS
Tempus can handle both single and dual
channel data files. Single channel data will
always be displayed in channel A, and dual
channel data will be split between channel
A and channel B. Channel A is located in
the field at the upper half of the screen, and
channel B in the field at the lower half of
the screen.
