Sounds
The figure displays the event and sound settings window. Sounds are active only when operating in the oscilloscope or spectrum analyzer mode. Sounds may be useful when searching the set waveform, e.g. searching the circuit with voltage of 3.3 V. or for indicating an out-of-range or undesireable value.
Functionally, the window is divided into two side by side panels - one panel for each channel (A & B). Each panel is further divided into 3 subgroups of settings, each one for one of the measured signal parameters (DC component of the voltage, AC component of the voltage, and signal frequency).
For each of the measured parameters, 3 'trigger' events can be specified:
- play the specified sound if the parameter is higher than set threshold,
- play the specified sound if the parameter is lower than set threshold, and
- play the specified sound if the value is approximately equal to the set threshold.
The threshold is set in the field positioned left of the corresponding parameter.
The sounds are set by clicking the relevant dropdown list and selecting one of the standard sounds or pressing the relevant button with the open hard drive icon (on the right) and selecting the desired sound file.
To listen to the selected sound you can click the playback button (positioned on the same bar with event name) with loudspeaker icon (far right side). All standard sounds are reproduced with the built in speakers, selected sound files are played when using the computer sound card, if any. To disable all sounds for the selected channel, click the Disable sounds button at the bottom of the corresponding panel.
Also, note that when comparing the parameter with the set threshold there is a small delta (a cetain range around the set value which will trigger the event). This means the sound will occur approxiametely at the threshold, but not necessarily exactly.
- For voltage the delta is determined as ±5% of the scale range of the measured channel, e.g. if for the channel A ±10 Volt/Screen is set and value Uconst = 3.3 V then sound will be reproduced if DC voltage component for the channel A is within 2.8...3.8 V.
- For frequency the delta is always DC and equal to ±20 Hz.