Wavewatch, a soundcard oscilloscope and waveform generator

• Clicking on ‘ChA’ or ‘ChB’ enables or disables channel displays.
• “Gain” changes gain level on channel A & B,

• “Time” adjusts time scale, from 10µs to 0.5s,
• Period is indicated in ms.

• Triggering source can be change from ChA to ChB, “Trigx” toggles triggering.
• adjust triggering point by clicking “Trig”, independantly on channel A & B,
• triggering mode is either “Auto” or “Single” (see below),
• “Start” or “Stop” acquisition,
• State of the triggering is given:
  • Running : Acquisition ongoing,
  • Stopped : Acquisition stopped, screen is frozen,
  • Ready : Ready to acquire at next triggering (Single shot mode),

Like in a HW scope, triggering allows display to be synchronised on the input signal, to help readability. It can be made on Channel A and Channel B.

• In “Auto” mode, screen is refreshed as soon as trig is reached. Display is continuously updated.
• In “Single” mode, screen is updated only on user request, which is initiated by pressing “start”. As soon as trig is reached, on acquisition is made, and scope is stopped.
• In “Auto” mode, pressing “stop” freezes the acquisition, and pressing “start” resumes it. Usefull to make a screenshot of a signal.

Auto mode is relevant for steady signals, and Single mode is usefull to track undesired or spurious events.

• Measurement Cursors are activated by clicking “Meas”,

Making a measurement is fairly simple:

1. press the “Meas” button,
2. place the first marker by clicking on signal,
3. place the second marker by clicking on signal again,
4. Time and Voltage Deltas are displayed below the cursor during measurement.

• “i” and “?” show respectively credits and keyboard shortcuts, in a popup window.

For more detail: Wavewatch, a soundcard oscilloscope and waveform generator