Questions tagged [test-equipment]

Anything related to test equipments such as multimeter and so on...

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2x GPIB via USB Adapter

I have 2 of the normal Agilent E3646A power supplies and an Agilent GPIB/USB adapter. All 3 devices have different GPIB addresses and the two supplies are connected together with a GPIB cable. ...
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59 views

Getting Agilent USB GBIP Adapter to work with NI-Visa or R&S GBIP over USB with Agilent Visa

This Visa/IVI jungle is pretty much a desaster. Not enough that each package contains GBs or data, they also cause problems when installed in parallel (one example: https://www.mathworks.com/support/...
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37 views

How to maintain the zero potential at the connector end?

I am developing Automated Test Equipment (ATE), from the ATE, on the output connector there will be a some potential exists. How to maintain the zero potential at the connector end, which goes to ...
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105 views

Viewing phase difference between two signals

I need the SPI clock and the device clock to be synchronized. I am using an Arduino (ATMega 2560) to communicate with the device. The device clock is being generated from using a timer on the Arduino (...
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212 views

How to calculate resistor values for a Foot Strap test circuit using a window comparator?

I'm attempting to create a circuit to test ESD foot straps (and wrist straps). Research has led me to a window comparator circuit for testing power supplies that I've used as a base for the drawing ...
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54 views

Why is there need for both functional validation and LBIST during Post-Silicon?

In Post-silicon testing, we have a functional validation testing where C tests are developed to verify the functionality of the SoC, through a JTAG interface connected to the PCB TAP and controlled ...
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268 views

Why doesn't a passive x1000 oscilloscope probe have 1000M Ohm impedance?

Most of the x1000 high-voltage oscilloscope probes I find seem to have input impedance around 100M Ohm. For example the P6015A from Tektronix (100M Ohm) or the PPE6KV from LeCroy (50M Ohm) or these ...
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28 views

Common rectifier (or source) to power testing equipments

I was thinking of a design of an all-in-one box that contains a DIY Oscilloscope, a DIY frequency generator, a DIY bench-top power supply (by a buck converter), and a multimeter (broken out from the ...
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59 views

Design approach for small, portable non-contact thermal measurements

I'm looking for ideas and suggestions for putting together a small, non-contact thermal measuring device for finding hot spots on a circuit board. It needs to be small enough that I can toss it into ...
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1answer
66 views

Designing a high frequency amplifier and needing an oscilloscope

I need an oscilloscope to bench test an amplifier I've building. I haven't got any. I thought If I limit it to 20kHz, it can be used as a sound amplifier. Would simply judging by the sound be enough ...
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52 views

MEMS or other modern component electroscopes

I was looking for a component-style electroscope. I thought, "Surely there must be some MEMS-based electroscopes capable of 2- or 3-significant-figure potential measurements." But the only thing ...
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137 views

60335-1 27.5 Test - Am I doing this right?

I work at company producing household appliances, and I'm looking into a way to test compliance with part 27.5 of the NEN-EN-IEC 60335-1 standard (which is derived from IEC 60335-1). It states (...
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60 views

Reduce amount of I/O required for automated switching

I got a device with a 16-pin connector. One of the functionality tests consists of shorting every pair of pins (the first with the second, the third with the fourth, etc.) and measuring the voltage ...
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74 views

20VDC LED Illumination

I'm looking to build a simple test circuit, where I can get an LED to illuminate when it senses 20VDC or above, and to remain off if it is sensing any less.
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118 views

How do I test 10-12 pF range capacitor

Here is the situation: I have few unknown 1% high precision capacitors and I know they are either 10pF or 12pF, and I have few known 12pF 1% capacitors. Q1, How can I test those unknown 10-12 pF ...
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144 views

Does anyone have any idea what this device might be?

I recently got a box of vintage stuffs. I came across this stuff. Its powered by a 9V battery. Does anyone has any idea what this is?
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4k views

What resistance/ load do battery testers (AA or AAA) use in Ohms please

Trying to find out what size resistors (Ohms) a AA or AAA battery tester would use? Have tried searching but unable to find an answer I meant testing alkaline and ni-mh 1.5volt and 1.2 volt batteries ...
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2answers
100 views

How can I power a device under test in a way that is safe for an oscilloscope?

Is it possible to power a circuit in such a way that makes it impossible to fry my oscilloscope with a ground loop? I've heard using a battery is a good way to prevent this. Is there a other way I ...
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138 views

why are ICT machines so expensive? [closed]

For example, take the HP/Agilent/Keysight i3070 ICT machine... why are there so many custom chips on in it? Couldn't the same thing be done with off the shelf FPGAs/opamps and relays? The tests it ...