Components + Guidesesc
Visualization

Oscilloscope (2 Channel)

Use DigiSim Logic Lab's 2-channel Oscilloscope to inspect digital LOW, HIGH, X, and Z transitions against simulator time without driving the circuit.

Overview

The DigiSim Logic Lab 2-channel Oscilloscope is a passive digital timing instrument. It records changes on CH1 and CH2 against simulator time without driving either signal.

Exact DigiSim.io Implementation

The capture service receives published simulator transitions rather than polling the inputs at a fixed interval. Each edge carries a nanosecond timestamp and one of four digital states: LOW, HIGH, unknown (X), or high impedance (Z). Each channel retains up to 8,192 edges in a ring buffer.

Timebase and Trigger Controls

  • The horizontal timebase follows a 1-2-5 sequence from 1 ns/div to 5 s/div.
  • Horizontal position moves the displayed acquisition window.
  • ROLL continuously follows simulator time.
  • AUTO can display a rolling window while waiting for a qualifying trigger.
  • NORMAL waits for a qualifying trigger and retains the completed acquisition.
  • SINGLE captures one qualifying acquisition and then holds it until rearmed.
  • The trigger can use CH1 or CH2, a rising, falling, or either edge, an adjustable trigger position, and non-negative holdoff.
  • Each channel can be shown or hidden independently; disabling a trace does not disconnect the pin.

Interpretation and Limits

  • Readouts are expressed in simulator time, not wall-clock time or measurements from physical hardware.
  • The instrument displays digital states; it does not sample analog voltage, apply a voltage threshold, model probe loading, or report electrical bandwidth.
  • A ring-buffer overflow means older retained edges were discarded. It does not imply electrical clipping or damage.
  • The 0/1/don't-care pattern trigger belongs to the 8-channel Oscilloscope, not this 2-channel model.

Learning Path

Prerequisites

Next Steps

Frequently Asked Questions

What is a digital oscilloscope?

The CH1 and CH2 inputs are passive logic probes. The instrument records published simulator transitions with nanosecond timestamps in a ring buffer of up to 8,192 edges per channel; it is not an analog voltage oscilloscope or a fixed-interval sampler.

How do I use the oscilloscope for debugging?

Choose a 1-2-5 timebase from 1 ns/div to 5 s/div, horizontal position, ROLL/AUTO/NORMAL/SINGLE mode, trigger source, rising/falling/either edge, trigger position, and holdoff. Timing readouts describe the simulator model, not physical hardware measurements.