Domain: Engineering — Instrument and Meter Engineering
Target concept: Sine Wave Signal Generator and Oscilloscope

Video generation prompt: Connect the probe of channel CH1 of the oscilloscope to the sine wave signal generator, turn on the signal generator, gradually increase the frequency of the output signal, and align the lens with the oscilloscope display.

Evaluation guide:
(i) Target concept: Real-time visualization of frequency-dependent waveform scaling on an analog oscilloscope via controlled signal injection.
Minimum mechanism: Signal generator must produce a clean, ground-referenced sine wave; oscilloscope must be triggered and timebase-stable; probe must provide low-capacitance, shielded path; camera must frame display to reveal scaling behavior.
(ii)Storyline: Frame 1–2: Probe approaches and connects to generator output + ground. Frame 3–4: Probe connects to CH1 input; CH1 indicator activates. Frame 5–6: Devices powered; initial sine wave appears centered. Frame 7–8: Frequency knob rotates visibly; waveform cycles increase in density horizontally. Frame 9–10: Camera viewpoint stabilizes, fully framing oscilloscope screen with visible grid and compressed waveform; no occlusion, no distortion, no timing mismatch.

Manual:
Experimental Procedure
1. Connect probe tip to signal generator output; attach ground clip to generator ground.
2. Plug probe BNC into oscilloscope CH1 input; confirm CH1 is selected.
3. Power on both devices; adjust amplitude to mid-range.
4. Gradually increase signal generator frequency while observing CH1 waveform.
5. Align camera lens to center oscilloscope display for clear view.
Observation of Experimental Phenomena
Sinusoidal waveform appears on CH1 trace; as frequency increases, waveform cycles compress horizontally on screen while maintaining amplitude and symmetry; no distortion, jumping, or disappearance occurs.
Summary of Experimental Principles
Sine wave generation relies on oscillator circuitry; oscilloscope CH1 input captures voltage vs. time; horizontal compression reflects increased frequency under fixed timebase; proper grounding prevents noise and ensures signal fidelity.

Prompt Grounding rubric:
level_1: No oscilloscope or signal generator is shown; the probe is never connected to anything; no CH1 label appears anywhere; no waveform is on any screen; no frequency-adjustment action occurs.
level_2: Only one of the two instruments is clearly shown, or the probe is unidentifiable; CH1 is missing or mislabeled; no connection is shown between the probe and the generator's output; no screen shows any waveform.
level_3: Both the oscilloscope and the signal generator are on screen and visually distinguishable; the probe visibly runs from the generator's output port to the oscilloscope's CH1 input; 'CH1' is legible on the oscilloscope's front panel; a waveform (moving or still) is on the screen; the generator's frequency knob is visible, though not yet shown turning.
level_4: All score 3 conditions hold, and the probe tip sits at the output port with its ground clip on the ground terminal; CH1 is clearly the active channel (its indicator lit or its trace the only one shown); the frequency knob visibly turns; the camera moves or settles so the oscilloscope screen becomes more centered in frame.
level_5: All score 4 conditions hold, and the probe connection looks fully seated with no dangling wire or half-inserted tip; CH1 stays the confirmed active channel (label, indicator, and trace all agree) for the whole clip; the waveform stays on screen and roughly centered throughout; the frequency knob turns smoothly in one direction; by the last frame the oscilloscope screen fills most of the frame with its grid, time/div and volts/div labels, and the waveform all legible.

Scientific and Causal Correctness rubric:
level_1: No sine wave appears at all: the screen shows noise, a flat line, or a non-sinusoidal shape (square, triangle, sawtooth); or turning the frequency knob produces no visible change in the trace whatsoever.
level_2: A waveform is shown but it is not a clean sine (visibly clipped, lopsided, or with extra humps); or turning the frequency knob makes the trace jump or reverse its spacing abruptly rather than compress smoothly.
level_3: A smooth, symmetric sine wave is visible on the CH1 trace, and as the frequency knob turns toward higher frequency, the wave's cycles visibly pack closer together horizontally on the screen; the wave never disappears or flattens to a DC line during the adjustment.
level_4: All score 3 conditions hold, and the wave's height stays the same as the cycles compress, without visibly shrinking, growing, or clipping; the horizontal scale markings on the screen don't appear to change; the wave's shape stays symmetric with no added kink or offset as frequency increases.
level_5: All score 4 conditions hold, and the trace stays free of jagged edges, shimmer, or flicker as the frequency rises; the display doesn't roll, jitter, or fade as though losing its trigger lock; the wave's smooth, symmetric shape holds at every frequency shown, with no ringing or overshoot appearing on its peaks.

Spatiotemporal Consistency rubric:
level_1: The oscilloscope or generator vanishes and reappears; the probe disconnects and reconnects with no visible motion; the waveform jumps to a new position or disappears mid-clip; the lighting suddenly flashes or changes color.
level_2: The probe's tip appears to move independently of its own cable; the oscilloscope screen looks like it's viewed from a different angle than the rest of the device in the same frame; the waveform's position shifts with no matching camera or knob motion.
level_3: The probe, oscilloscope, and generator all stay in the same relative spot in the frame; once connected, the probe stays connected for the rest of the clip; the waveform trace is visible without gaps; the camera holds a steady viewpoint with no unintended zoom, pan, or rotation; the lighting stays even for the whole clip.
level_4: All score 3 conditions hold, and the probe cable follows a natural curve rather than snapping into straight lines or impossible bends; the labels on the oscilloscope's front panel stay legible and undistorted; the waveform's compression during the frequency ramp looks smooth rather than stuttering or freezing; nothing that should be behind the probe or hand appears in front of it inconsistently.
level_5: All score 4 conditions hold, and the probe's connection happens in one continuous motion with no cut or jump; the frequency knob turns at a steady pace that matches the rate the waveform compresses; the final camera framing settles smoothly rather than snapping suddenly into place; the screen's grid lines and the devices' edges stay straight and undistorted throughout.