Tag Archives: probe

Teardown & analysis of a Keysight InfiniMax III N2802A 25GHz active probe

A teardown & analysis of a Keysight InfiniMax III N2802A 25GHz active probe from TheSignal Path:

In this episode Shahriar takes a close look at one of Keysight (Agilent) InfiniMax III active probes. The model N2802A offers 25GHz of analog bandwidth, 17.5pS of rise time and a total differential input capacitance of 32fF at 10k-Ohm input impedance. The front-end amplifier of this active probe is designed in an in-house InP process, the same process responsible for the front-end of the X-Series Keysight oscilloscopes.
The teardown of the probe shows the control circuitry in the main probe body built around a PIC 16F877 microcontroller coupled to a DAC, EEPROM memory and various high-current and precision op-amps for biasing. The main front-end microwave module reveals the InP ASIC and supporting microwave circuity. There seems to be a dual-path design to provide a large DC common-mode offset capability as well as a high-bandwidth.

Teardown & analysis of a Keysight InfiniMax III N2802A 25GHz active probe – [Link]

Compensation of Oscilloscope Probes

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by Maurizio @ dev.emcelettronica.com:

Using simple wires to measure signals with the oscilloscope would result in unreadable plots on the scope, the main reason being the noise coupled onto the “probe” itself. The first line of defense against that would be to use a coaxial cable as a probe, which would prevent external noise coupling.

An unwanted deterioration of the measured signal is due to the capacitive loading that such a piece of cable adds to the signal. An equivalent schematic of an IC to IC signal is illustrated in figure 1.

Compensation of Oscilloscope Probes – [Link]

Teardown & Analysis of a Keysight InfiniMax III N2802A 25GHz Active Probe

In this episode Shahriar takes a close look at one of Keysight (Agilent) InfiniMax III active probes. The model N2802A offers 25GHz of analog bandwidth, 17.5pS of rise time and a total differential input capacitance of 32fF at 10k-Ohm input impedance. The front-end amplifier of this active probe is designed in an in-house InP process, the same process responsible for the front-end of the X-Series Keysight oscilloscopes.

The teardown of the probe shows the control circuitry in the main probe body built around a PIC 16F877 microcontroller coupled to a DAC, EEPROM memory and various high-current and precision op-amps for biasing. The main front-end microwave module reveals the InP ASIC and supporting microwave circuity. There seems to be a dual-path design to provide a large DC common-mode offset capability as well as a high-bandwidth.

Teardown & Analysis of a Keysight InfiniMax III N2802A 25GHz Active Probe – [Link]

Tiq Probe – an easy to use tool for debugging maker projects

tiq – see what’s happening inside your Arduino, RasPi, robot or 3D printer – no settings, just probe & tiq tells you – automatically!

tiq is designed to be the first tool you’ll use when chasing issues in your electronic project, Arduino, Raspberry Pi, internet-of-things-thing or robot – automatically giving you fast, detailed information in an easy-to-connect handheld probe. No other tool has ever offered tiq’s unique combination of powerful features – or its low price!

Tiq Probe – an easy to use tool for debugging maker projects – [Link]

FluxProbe – measure currents without touching the conductor

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via avrs-at-leipzig.de:

FluxProbe is a test prod for measuring currents without touching the conductor it is flowing through. More acurately it is measuring the magnetic flux. This way you can measure currents on PCB traces without having to put a resistor in between. This test gear enables you to trace faults in your PCB (for example search for a short circuit). This is usefull for commissioning of you circuit for example.

FluxProbe – measure currents without touching the conductor – [Link]

SKS – measuring and testing with pleasure

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Testing probes, clips, cables and other products of company SKS enable simpler and more effective testing and development.

Probably, you´ve already faced the situation, when it was necessary to measure several signals at once, or for example to have a voltmeter connected in some point of a device and to control another equipment at the same time. In such cases, it would be great to have another pair of hands. The solution not only for these cases are the well proven SKS-Hirschmann measuring and testing accessories of German company SKS.

Who´ve ever worked with test probes or various other testing clamps, for example of the KLEPS series knows, how significantly these components can simplify and speed-up development or testing. The KLEPS 2700 test probe is extraordinary by a fact, that it comprises a stainless steel piercing tip, able to penetrate insulation of common leads (without damage), thus enabling to measure a voltage in a given lead without its stripping. Similarly for example PRUF series testing probes are able to reliably penetrate a PCB protective lacquer or through an oxidized layer and enable a precise measurement even in relatively dense PCBs without risk of tracks short-circuit.

With the Micro-SMD Clip it is possible to measure signals on all common 2-pole SMT components. Various crocodile probes enable a reliable connection with wires or PCB terminals. A big benefit of SKS-Hirschmann crocodile probes is the fact, that their jaws enable a reliable grip even of very thin wires.

A common feature of all SKS-Hirschmann components is a high quality being reflected even in such common products like banana plugs and sockets (2mm and 4mm, including reductions). A useful accessory for every workplace can also be measuring leads and cost-effective sets.

In case of interest in any SKS-Hirschmann product, please contact us at info@soselectronic.com.

SKS – measuring and testing with pleasure – [Link]

Homebrew highspeed lo-Z scope probe

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Check out how to build a high speed oscilloscope probe that measures 125MHz signals better than commercial probes. Paulo Oliveira writes: [via]

Some years ago, I learned some valuable lessons about probing high-speed signals. Somehow, mistakes have a way to sticking in your mind and we call them “experience”. Most modern oscilloscopes come with a “high-bandwidth” 10X passive probe. Figure 1 shows the venerable Tektronix P6139, 500 MHz, 8pF probe. At first glance, a “500 MHz probe” might seem adequate to probe say, a 125 MHz clock signal right? Wrong… We will see why with a practical example showing the issues you run into when trying to probe such a signal. Later in the article, I’ll also show how a surprisingly simple and affordable DIY passive probe can outperform even the best 10X passive probes for this particular application.

Homebrew highspeed lo-Z scope probe – [Link]

A Simple EMF Probe

tuomasnylund.fi writes:

There’s something fascinating about electromagnetic fields. Thanks to the modern world and the prevalence of electronics and electricity, they’re all around us these days. But because of the extremely limited array of senses that we humans have, we spend most of the time completely oblivious of them. Wouldn’t it be cool to make something simple that could not just detect them, but would allow you look at the waveforms on an oscilloscope. An EMF probe in other words.

A Simple EMF Probe – [Link]