Tag Archives: probe

High-performance scope probes top out at 20 GHz

Tektronix, Inc., the world’s leading manufacturer of oscilloscopes, introduced the P7700 series of TriMode™ probes for use with Tektronix performance oscilloscopes. Offering up to 20 GHz bandwidth, the new probes ease the challenges designers face when debugging circuits found in the latest mobile and enterprise designs by minimizing probe loading, improving access to smaller, more-densely packed test locations and lowering overall cost of ownership.

The new P7700 series of probes from Tektronix takes a completely different approach, with the input amplifier integrated into the probe tip less than 4 mm from the connection point. This minimizes signal loss as well as probe capacitance and reduces noise susceptibility.

With prices starting at $8,500, the P7700 probes are intended for professional users.

High-performance scope probes top out at 20 GHz – [Link]

An almost-GHz active differential oscilloscope probe

 

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Christer wanted to see how a 500MHz differential clock was behaving so he decided to build an active probe. To simulate the circuit he used TINA spice software and documented the process in three parts on his website.

What I really wanted was an active differential probe which should be able to look at a 500MHz signal at a couple of volts or so with decent fidelity. To do that I wanted a probe with about one GHz of usable bandwidth. I have an old Tektronix 11801B scope with two 20 GHz sampling heads with 50Ω single ended inputs that can handle signals which are 1.0V peak-to-peak so that’s what I wanted the probe output to be compatible with. The probe must attenuate the signal so to not overdrive the inputs and to make things easy to calculate I decided on letting the probe have a 1:10 attenuation.

An almost-GHz active differential oscilloscope probe – [Link]

Building a simple Circuit Probe

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Vicente Jiménez has published a new project. It’s a circuit probe that gives an indication when a node is floating or driven logic high or logic low and can also be used as a continuity tester. He writes:

Sometimes you need to check one circuit and test some of its nodes. Usually a tester in voltage mode is a good solution, but it has a pair of problems. First, it measures about zero both when the node is driven at zero volts and when the node is floating (not driven at all). Second, it gives the information on the tester display, so you need to take the view from the circuit to the tester to check the voltage.

Building a simple Circuit Probe – [Link]

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]