Oscilloscope Manual

[Sherry Galeazzi]

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The 2194 combines performance and value all in one portable solution. This oscilloscope provides 100 MHz of bandwidth in a 4-channel configuration with a maximum sample rate of 1 GSa/s and a maximum memory depth of 14 Mpts. The 2194 comes equipped with a 7" widescreen display and extensive features including segmented acquisition, FTT and serial decoding for five different communication protocols. This model is the ideal solution for educational settings and hobbyists.

The CP62 current probe allows a general purpose oscilloscope to display AC and DC current signals up to 100 A Peak (70 A RMS). The CP62 current probe can also make AC and DC measurements with a multimeter by using the recommended accessory TL62 (BNC-to-banana) plug adapter.

General Purpose BNC & N Type Adapter Kit provides a comprehensive range of in-series and between-series BNC and N Type coaxial adapters for basic RF testing and troubleshooting needs. The 12 piece kit, packaged in a convenient foam-lined storage case for easy selection and use, is ideal for all popular instruments. The kit contains the most commonly used BNC and N Type adapters for everyday testing. All components feature 50Ω impedance, gold plated center contacts, and low VSWR to ensure accurate repeatable measurements. Features: BNC & N Type 50Ω Connectors Gold plated center contacts Storage case Applications: Production Testing Stations Service & Repair Facilities Educational Test Benches

Use an MSO5000 with the latest firmware and the embedded generator or bundle option and get access to the new Bode Plot capability. The embedded generator sweeps frequency while the oscilloscope measures phase and gain. Bode plot data and chart are shown on the display for easy analysis.

To get started using your instruments over the bus download UltraSigma instrument communication software or for older instruments or customized installations review the How to Guide:

Using VISA and drivers to communicate with instruments

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The GOS-622G are general purpose analog oscilloscopes with 20MHz bandwidth, respectively. These products are designed for a wide range of applications ranging from product designs or assembly lines to EE laboratories or class experiments. Featuring a low vertical sensitivity at 1mV/div and versatile triggering, the GOS-622G can reliably capture small signals. The GOS-622G is the highest performance/price solution in the Test & Measurement market.

Have you ever found yourself troubleshooting a circuit, needing more information than a simple multimeter can provide? If you need to uncover information like frequency, noise, amplitude, or any other characteristic that might change over time, you need an oscilloscope!

O-scopes are an important tool in any electrical engineer's lab. They allow you to see electric signals as they vary over time, which can be critical in diagnosing why your 555 timer circuit isn't blinking correctly, or why your noise maker isn't reaching maximum annoyance levels.

We'll be using the Gratten GA1102CAL -- a handy, mid-level, digital oscilloscope -- as the basis for our scope discussion. Other o-scopes may look different, but they should all share a similar set of control and interface mechanisms.

The main purpose of an oscilloscope is to graph an electrical signal as it varies over time. Most scopes produce a two-dimensional graph with time on the x-axis and voltage on the y-axis.

Controls surrounding the scope's screen allow you to adjust the scale of the graph, both vertically and horizontally -- allowing you to zoom in and out on a signal. There are also controls to set the trigger on the scope, which helps focus and stabilize the display.

In addition to those fundamental features, many scopes have measurement tools, which help to quickly quantify frequency, amplitude, and other waveform characteristics. In general a scope can measure both time-based and voltage-based characteristics:

Learning how to use an oscilloscope means being introduced to an entire lexicon of terms. On this page we'll introduce some of the important o-scope buzzwords you should be familiar with before turning one on.

While no scopes are created exactly equal, they should all share a few similarities that make them function similarly. On this page we'll discuss a few of the more common systems of an oscilloscope: the display, horizontal, vertical, trigger, and inputs.

Older scopes (especially those of the analog variety) usually feature a simple, monochrome display, though the intensity of the wave may vary. More modern scopes feature multicolor LCD screens, which are a great help in showing more than one waveform at a time.

The vertical section of the scope controls the voltage scale on the display. There are traditionally two knobs in this section, which allow you to individually control the vertical position and volts/div.

The position knob controls the vertical offset of the waveform on the screen. Rotate the knob clockwise, and the wave will move down, counter-clockwise will move it up the display. You can use the position knob to offset part of a waveform off the screen.

Using both the position and volts/div knobs in conjunction, you can zoom in on just a tiny part of the waveform that you care about the most. If you had a 5V square wave, but only cared about how much it was ringing on the edges, you could zoom in on the rising edge using both knobs.

Using the GA1102 as an example again, the display has 14 horizontal divisions, and can show anywhere between 2nS and 50s per division. So zoomed all the way in on the horizontal scale, the scope can show 28nS of a waveform, and zoomed way out it can show a signal as it changes over 700 seconds.

The trigger section of a scope is usually comprised of a level knob and a set of buttons to select the source and type of the trigger. The level knob can be twisted to set a trigger to a specific voltage point.

A series of buttons and screen menus make up the rest of the trigger system. Their main purpose is to select the trigger source and mode. There are a variety of trigger types, which manipulate how the trigger is activated:

An oscilloscope is only good if you can actually connect it to a signal, and for that you need probes. Probes are single-input devices that route a signal from your circuit to the scope. They have a sharp tip which probes into a point on your circuit. The tip can also be equipped with hooks, tweezers or clips to make latching onto a circuit easier. Every probe also includes a ground clip, which should be secured safely to a common ground point on the circuit under test.

Most probes have a 9MΩ resistor for attenuating, which, when combined with a standard 1MΩ input impedance on a scope, creates a 1/10 voltage divider. These probes are commonly called 10X attenuated probes. Many probes include a switch to select between 10X and 1X (no attenuation).

Beyond the passive attenuated probe, there are a variety of other probes out there. Active probes are powered probes (they require a separate power source), which can amplify your signal or even pre-process it before it get to your scope. While most probes are designed to measure voltage, there are probes designed to measure AC or DC current. Current probes are unique because they often clamp around a wire, never actually making contact with the circuit.

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