Oscilloscope - Vox -01 Operating Manual

Oscilloscope

The oscilloscope module is intended to quickly inspect acoustic signals, in particular peri-
odic signals, in the time domain.
Sine wave with a frequency of 1000Hz as seen through the oscilloscope module
Directly from the first screen of the module (see above), you can control the horizontal scale
(time base) and vertical scale of the graph, as well as the trigger mode. Select which setting
you want to adjust, and press "set." Then choose the intended setting; by pressing "back"
you can go back to reach the other settings again. Under trigger mode, you can set the level
and slope (rising/falling). Red lines by the vertical axis indicate the trigger level.
Additional settings can be accessed through separate screens of the oscilloscope module.
These include the measuring time, the choice whether or not to apply linear interpola-
tion on the data, enabling or disabling frame averaging, and a choice between acoustic
and electric measurements. If you are measuring sounds (with the microphone mounted),
choose "acoustic." The amplitude scale will be expressed in the unit Pascal (Pa). If you
are measuring without microphone, but directly into the XLR input, select "electric." The
vertical scale will be expressed in Volts (V). Similar to any other oscilloscope, the settings
for the time based and sensivity are expressed relative to the division lines on the screen (s/
div, V/div, Pa/div).
Remember to turn of the 48V phantom power through the settings menu if you
intend to do electric measurements. Note that the input impedance of the XLR
input is (nominally) 2 kOhms.
The basic operation of the oscilloscope module is similar to the common (hardware) oscil-
loscopes that many engineers are familiar with. Note that the frequency response of the
system is limited to audio frequencies (up to 20 kHz).
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VOX -01 Operating Manual