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Questions tagged [test-equipment]

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

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1answer
54 views

Voltage tester pens

This is my first post here so please have patience with me: I understand, there are at least two kinds: a direct contact tester which basically is a neonnlight, and a resistor a non contact AC meter ...
0
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1answer
43 views

What physical tool to use to quickly dump firmware?

Recently, I managed to take a dump of the firmware and write a modified one using the pins that I marked with red by soldering 4 thin wires to those points. Now, I needed to perform this more than 50 ...
0
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1answer
33 views

Mixed equipment grounding

I have built an analog circuit PCB that I want to debug. It has to get a bipolar power +-5V and an input sinus signal. The signal on the CUT (circuit under test), has buffered inputs (but a common ...
4
votes
1answer
49 views

Diagnosing power supply issues?

I have a workstation that's becoming a little long in the tooth, as it were. It's a rock solid system, but about a year ago it had a faulty power supply that I replaced. During the past 11 or so ...
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0answers
16 views

How to properly measure signal power with FSW signal analyzer

I am using a R&S FSW Vector Signal Analyzer as RF capturing device (using the IQ Analyzer mode and transfering IQ data via SCPI). In lack of a powermeter I also want to use it to measure the ...
0
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2answers
119 views

What should I buy to test whether my DC power supplies are able to provide their rated power? [closed]

I recently bought an aftermarket AC-DC power supply for a laptop which was woefully defective. When connected to a Chromebox, a boot message appeared indicating that the supply could not provide ...
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0answers
74 views

Design Environmental test chamber RS232 protocol

I have recently acquired an environmental test chamber from Design Environmental. The unit has what appears to be an RS232 interface from which I can get nothing sensible. As you can see, the DB9 ...
14
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1answer
907 views

What is a “universal bridge”?

I recently came across this intriguing instrument from the 1970s(?): It's a "Universal Bridge" made by Wayne Kerr. It's not a type of device I've come across before and I'm curious what these are (...
2
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1answer
38 views

Selecting the equipment with the optimal 10 MHz reference

In a larger testbench I have 5 synchronized instruments (signal generators, ARBs, VSAs etc). I am trying to decide which instrument to take as "master". I rule out the older/cheaper parts (Tektronix ...
2
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2answers
98 views

10 MHz reference distribution (daisy chaining vs. BNC tees vs something else)

10 MHz is the quasi-standard for reference clock in measurement equipment. Most boxes have "REF in" and "REF out" or "10 MHz in"/"10 MHz out". In my case, I have a measurement setup consisting of an ...
8
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4answers
1k views

What equipment do I need to test an eye diagram for USB?

I'd like to test USB full speed with a goal of testing high speed (480 Mbit/s), I have a tek scope that does 300 MHz (which I could upgrade to 500 MHz) and I'm looking at a 500 MHz differential probe. ...
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2answers
72 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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2answers
894 views

Manually test computer Ethernet port with a multimeter

I have updated the drivers for the ethernet port an a laptop at home, yet it is only letting 10 mbps through for every cable that is connected, even though Speed/Duplex was set to Dual 1 Gb. I now ...
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0answers
55 views

IC test clip alternatives without soldering

I can't believe how much DIP IC test clips cost. But anyways, I'm looking for an alternate way of testing pins without buying the clip without using Solder on any part of the circuit, so the answer to ...
0
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2answers
53 views

Question about a trigger input of a modern ARB/VSG (Vector Signal Generator)

Given a common setup: The green box is a PCB mainly consisting of a data acquisition device (ADC+RF frontend) which is controlled by a Spartan-6 FPGA. The ADC & FPGA use a clock from a Tektronix ...
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1answer
102 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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0answers
30 views

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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4answers
51 views

Isolation with inverter

Say I used a 12v car inverter powered by a 12v brick connected to ac mains (no ground pin) to isolate a scope and bench dmm, the inverter has no earth ground. Is the equipment isolated? Is lack of ...
3
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2answers
247 views

Is there a reason that phase testers are not prevalent in the USA?

Soft question here. I grew up in Ireland where phase testers (see picture) were used to check liveness of domestic wiring. They were also convenient for checking the ignition in a car. I never see ...
0
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1answer
33 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/...
0
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1answer
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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0answers
73 views

I need to introduce a connector into a USB-C cable

I need to introduce a test system connector in between a few of USB-C 3.1 Data cables, I started with a pin out of 1 to 1 between a few of type C receptacles using a high speed Samtec connector and ...
2
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1answer
37 views

Making a model of a transformer

According to this link, the equivelent circuit diagram of a transformer (seen from the secondary side) looks like: Now, I want to find the values of the following constants: $$R_p,X_p,R_c,X_m,R_s,...
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2answers
62 views

Looking for multi-channel event counter IC to verify switch operation

As part of a project, I'd like to test the correct operation of a set of SPST switch ICs (maybe 8 or 16 or so). Each device contains six independent switches, and they are controlled through an SPI ...
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2answers
52 views

How to synchronize two different precision measurement instruments?

I am trying to design a turbidity detector and this has to be sensitive to tiniest amounts of contamination present in a sample fluid. My setup consists of a 780nm laser whose current I control with ...
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1answer
113 views

CE certification

One of the required CE test technical files is "Test Reports". This document has to be provided to the test agency. Does anyone know what data should be included in this document? Here are the ...
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0answers
128 views

Good equipments to measure current consumption for IoT devices

I was asked to bought some equipment to measure the current consumption for the IoT devices. The company is a startup and has a limited budget for this (let's say less than 5k$). I'm looking for an ...
2
votes
1answer
90 views

Low volume mixed signal electronics production (hardware test, calibration, flashing) automation [closed]

I am designing a mixed-signal board with microcontroller that will need flash memory programming for its firmware, (self-)testing, and documentation for the final production steps. I know there is a ...
0
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0answers
85 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 (...
0
votes
3answers
115 views

how much ADC noise adds to signal? [closed]

(I've reworded this question from earlier) I ground the input of an ADC that has 50 Ohms internal termination, and observe a noise waveform. I measure the RMS voltage of this waveform. Then I ...
1
vote
2answers
284 views

Is it possible to test a MIDI device through its connector with a multimeter?

I have a Fluke 115 multimeter available that I'm hoping has capabilities to register (even with low fidelity) any MIDI signals flowing out of a handful of devices. ...
6
votes
1answer
98 views

Test fixture PCB reliability metrics?

I am working on a project for a client that involves developing a reliability test fixture that will be used for stressing the end test device (DUT). The test fixture is a PCB which has linear power ...
0
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1answer
64 views

testing no leads packages for pin to PCB pad connectivity

After having spent 4 hours to hot air solder, multimeter probe, apply flux around the sort circuiting pads, re- hot air, re- probe and finally apply wick & iron to get rid of those shorts I am now ...
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1answer
130 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?
2
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1answer
84 views

Power supply test lead design questions

So, now that I have a bench power supply (0-+/-25V at 0-1A, 0-6V at 0-5A) on my bench, I need a set of test leads for it. Considering that I have had variable experiences with power supply test leads ...
0
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2answers
149 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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2answers
846 views

How can the test pen light up when touching your fingers that doesn't have or have very little electricity current?

I saw this video: https://youtu.be/KiJH1lgaHrY?t=1m49s (at 1:49) where the guy touched the test pen with his fingers and the test pen lights up. How could it possible? I tried that on my test pen and ...
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3answers
73 views

What are the advantages of a internal high-precision oscilator over an external one

Many lab measurement equipment for analog, radiou and RF purposes, such as frequency counters, arbitrary signal generators, oscilloscopes, etc. have the option to input an external reference clock (...
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2answers
1k views

How to check if there is electric current on material surface?

If there is electric current on a material surface (but not an obvious thing like outlet hole or such), what is the best tool to check it ? Is it possible to use multimeter? Example case: There is a ...
0
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1answer
74 views

What is the purpose of external terminals on a logic probe?

I have an LP-3500 logic probe. In addition to the normal connectors to power and ground at the bottom, it comes with two external terminals (one red, one black), which can be connected on the side ...
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0answers
48 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 ...
17
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4answers
3k views

What kind of wire connectors are these? [duplicate]

The loop ones. I've never seen them before.
1
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1answer
181 views

How do I test my gloves for ESD?

There is a lot of fake products in the market, and sometimes the original products fail to protect electronic components from ESD. My question is how do I test my gloves "with simple equipment" if it ...
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4answers
113 views

Getting 240VAC output from 220-230VAC input

For lab testing at work I need to be able to test an appliance (often more than 3KW, e.g. deep fryers and waffle irons) at 240VAC. The problem is that our power grid only provides between 220 and 230 ...
1
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1answer
2k views

How to check if an IC is fried?

I was using my 74173 (d-type register) today and accidentally attached the vcc pin to ground and the ground pin to 5v. I didn't realize this and turned on the power. A couple seconds after turning ...
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1answer
129 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 ...
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1answer
182 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 ...
0
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1answer
143 views

Test an LCD for missing segments without looking at the screen? [closed]

I have a product with an LCD screen that sometimes fails with missing segments. I will test the product for a long time to replicate the failure. I will test many at once. I don't want to sit watching ...
0
votes
1answer
108 views

Circuit or Equipment to delay high speed square clock signal?

Hi I have a ttl clock signal that id like to change the phase of to see if it changes effects the unit under test (not relevant but its a digital transmitter and an automated testing setup) this way I ...
1
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0answers
93 views

Equipment to measure strong constant (in time) and slowly changing electric fields

I would like to measure the electric field in the vicinity of an object of interest. I would like to have decent spatial resolution (i.e. be able to pinpoint a measurement to a point in space within ...