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Let’s start with this formula: sampling rate = storage depth ÷ waveform recording duration. When purchasing an oscilloscope, you’ll often see specifications like 1 GS/s or 2 GS/s. As this formula shows, the sampling rate isn’t fixed as these labels suggest. Since the storage depth is a constant, adjusting the oscilloscope’s record length will correspondingly reduce the sampling rate. Therefore, the storage depth ensures that even during long‑duration signal acquisition, a high sampling rate can still be maintained.

In normal trigger mode, the oscilloscope triggers and displays the signal only when the trigger conditions are met. In auto trigger mode, the oscilloscope first attempts to trigger; if it fails to do so within a specified time, it forcibly displays the signal currently captured.

You can use single‑shot triggering, or set the memory depth to its maximum and then record the waveform at a long time base to observe it in detail.

The probe product line includes optical-isolated probes, high-voltage differential probes, flexible current probes, high‑frequency/low‑frequency AC/DC current probes, and AC current probes, among others. These probes are compatible with oscilloscopes, enabling signal acquisition to meet the demands of complex test scenarios.

Thanks to SigOFIT™ technology, Micsig optical isolated probes and high‑voltage differential probes maintain high‑precision signal transmission even in environments with high voltages and strong common‑mode interference, thereby addressing a critical challenge in the high‑speed switching characterization of third‑generation semiconductor devices such as SiC and GaN.

Micsig products are widely used in the R&D, testing, and operations & maintenance phases across sectors such as power semiconductors, power electronics, automotive electronics, industrial automation, and new energy.

When the oscilloscope is set to a long time base, the duration of the waveform being observed is correspondingly extended. For example, if the time base is set to 1 second and the horizontal axis spans 14 divisions, then one screen of the waveform represents 14 seconds. To view a 14-second waveform, you would theoretically have to wait 14 seconds. In roll‑mode, however, the waveform scrolls from right to left, refreshing continuously so that you can immediately see how the waveform evolves. This mode is typically used for observing waveforms with frequencies below 5 Hz.

Bandwidth is a fundamental specification of an oscilloscope. When using a 200 MHz‑bandwidth oscilloscope to measure a 1 V, 200 MHz sine wave, the measured amplitude will be attenuated to only 0.707 V. However, this simple rule does not apply to square or triangular waveforms; their spectra must be analyzed via Fourier transformation, taking into account how many lower‑order harmonics are of interest. For example, with a 40 MHz square wave, according to spectral analysis principles, you can typically resolve only up to the fifth harmonic at 200 MHz—harmonics beyond the fifth become indistinguishable, and the square wave may appear as a curve with some rounding. Of course, once a signal exceeds the oscilloscope’s bandwidth, only its amplitude is attenuated; the frequency content remains unchanged. If your primary concern is the frequency itself, such considerations are less critical: a 200 MHz square wave will still be measured at 200 MHz. When selecting an oscilloscope, to achieve a given measurement accuracy, it is generally advisable to choose a bandwidth that is at least five times the highest frequency component of the signal.