Questions tagged [test-equipment]

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

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Method for building a test fixture for the 4294A impedance analyzer?

I have an Agilent 4294A, a 40Hz-110MHz impedance analyzer, but no test fixtures to use. Unfortunately the official test fixtures are out of my price range so I need to build some. After reading ...
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How to test PDM conversion on MCU

I have a MEMS microphone which outputs PDM and is connected to an STM32U5. It's connected via the integrated Audio Digital Filter (ADF) peripheral which implements conversion from PDM including ...
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Can I connect low-power resistors to achieve a high-power resistive load?

I've designed an 80 W 400 V PFC boost converter and I want to test it with resistive load. but I couldn't find a low-cost high power (20 to 80 watts) resistor in the range of 2k to 10k ohm. Is there ...
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Best socket for 2mm multimeter probe

I'm looking for a 2mm jack suitable for plugging a multimeter probe into (the probe end of the cable, not the meter end). I believe a 2mm banana jack would work and I've narrowed things down to two ...
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How to protect measurement equipment channels from ESD?

I was wondering what is the best way to protect measurement equipment, when handling like oscilloscopes/spectrum analyzers/Vnas/sensitive circuits (especially when stored in (none esd) foam)? I was ...
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What is the name of this huge high-power test equipment?

It seems very old, maybe more than 50 years, and it doesn't have an information plate.
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How do you build a spurious emissions test rig?

Naively, it seems like you could test for spurious emissions by: Placing the device-under-test (DUT) in a grounded metal box with a broadband antenna inside. Hook the antenna's coax cable to the S21 ...
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How do you build an RF device-under-test rig to create your own touchstone (s2p) files with a VNA, de-embedded to pins?

Can you calibrate a VNA to the pins of just any (low-power or passive) component and then generate an S2P to optimize an impedance match with RF simulation software to do whatever you want? If so, ...
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Testing 16K SRAM in TL866 II Plus?

I have a GoldStar GM76C28A-10 16K (2048 x 8) SRAM DIP chip that I want to test in my TL866 II Plus. I don't see this chip in the list of known chips in the Xgpro v11.60 software and none of the "...
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What pitch is 14-pin header adapter

the device PCB have serial console port header and 14-pins test points right next it. It marked as J303, J304. The device processor is MIPs based, so I assume that could be a 14-pins MIPS JTAG header. ...
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Measuring extremely small inductance (pH) with transient pulse response

I've made an inductor device. It has 2 terminals. It has inductance, resistance, and some parallel interwinding capacitance. I am using a Keysight B1500a semiconductor probe station, which has ...
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Analog scales: Why do they have a metallic strip?

I have a couple of meters with analog scales and want to know why they have a shiny metallic area following the scale.
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Can anybody tell me what this device is and/or what it is used for?

I found this while going through some things at my grandfather's house. I believe it is used for residential wiring, but I'm not entirely sure. It resembles a pen. The tip is spring loaded with a very ...
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Efficient discharge of capacitor voltage to 2-10 ohm DUT

I need to apply the voltage in a capacitor to a load (between 2 and 10 Ω) and need to have the most efficient and simple method to do so. The goal is to apply power to a DUT (device under test), ...
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What does "Vpp" mean in terms of generated and measured waveforms?

I'm using a Keysight "EDUX1052G" oscilloscope (with built-in wave generator) to drive a red LED through a 470 ohm resistor. (I'm taking great care to keep the current draw on the wavegen to ...
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Viewing 100-200ns pulse on oscillocope

I've recently bought a Gould OS300 twin-beam 20MHz oscilloscope. I'm trying to view a 100ns to 200ns pulse, but I'm not sure I'm using the correct settings. The pulse voltage goes from 3.80V to 0V so ...
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Is there any SOIC test clip with 54 pin? [closed]

I need to test this IC, which has 54 pins, without unplug it from the PCB. So far I could not find SOIC test clip with 54 or more pins, so I was wondering if even such that test clip exists? If not, ...
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Reason for using short leads with capacitor tester?

When I was a high school freshman many moons ago, I took an electronics course. When the instructor introduced capacitors and how to test them, we used meters that had very short (3 inches or so long) ...
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What test equipment can simulate the inductive load of a DC motor?

I am working on a power supply circuit designed to drive DC motor. Currently, I am testing using the actual DC motor, but I would like to start using test equipment instead. There are several options ...
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how can I figure out if 1-3V is flowing from something using household items?

Basically what the (unconventional) question says! I don't have a voltmeter at home. How can I fashion one, or use some kind of test to determine if current is flowing? I know it's a relatively low ...
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2 votes
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200 Input Smart Multimeter Project

First off, thanks for taking the time to read this and help out. Here's a quick overview of what I am trying to design. I have a break out box that has 200 female probe inputs. Each input is numbered, ...
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What are the IEC standards/certifications to look for in a DSO while making measurements pertaining analog parameters like CMRR, SNR, THD etc

I am in the process of measuring CMRR for our mixed signal system that deals with bio-signal acquisition. I am using DSOX2014A keysight entry-level oscilloscope to make measurement to derive CMRR, SNR ...
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3 votes
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Help identify component HP5300A

The red framed element is on a PCB of a 1973 Hewlett Packard 5300A Measuring System, Digital Multimeter Board. The double wire seems to have normal resistance. What is the screw for?
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Generate Square Wave with Fast Rise Time for Testing

I'm looking to economically generate a 1-2 GHz (configurable) Square Wave with a rise time of 200ps (or faster) to test the performance of various active scope probe designs. I don't need to be able ...
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What does this multimeter tempco spec mean?

This is the accuracy spec for an Agilent 34401A 6-1/2 digit multimeter. What exactly does the "temperature coefficient" mean here? Does it mean that the reading will not change by more than ...
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Can I use an adjustable DC power supply to discharge a battery?

With a typical adjustable DC power supply, I can set the current (typically a mode called I-Set) to provide a fixed current by controlling the voltage. (within the limits of the supply) When testing a ...
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Test device for capacitive touch screens?

Are there any (more or less) simple test devices for capacitive touch screens, e.g. something which I can attach to a touch screen and which is able to do capacitive inputs at fixed locations (ideally,...
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How can I make a test circuit and application for CA3020A power amplifier?

I found these components recently and am eager to work on them. I first need to check if they are working and then need to make an application with them. I referred to the data sheet but still not ...
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1 answer
336 views

100Mhz damped Sine Wave

I have simulated an damped sine wave generator in ltspice. Since I couldn't find a model for single pole double throw relay, I used two switch. It is very basic circuit first charges capacitor and ...
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Automotive 20:1 Oscilloscope Passive Attenuator Design

I'm currently working on designing a switched, passive 20:1 attenuator for use in an automotive educational environment on PicoScope PC based oscilloscopes. In automotive electrical diagnostics, it's ...
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Constant resistance mode in electronic load

I have this DC electronic load. I am setting this electronic load to a constant resistance mode option - say 100 ohms - and turning the output ON. When I measure the resistance across the electronic ...
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Problems enabling remote voltage-sense Rigol load DL3021 via SCPI

I am automating some tests with Rigol hardware. There is only one bottleneck in the SCPI implementation that I can't figure out: How to enable the remote voltage-sense terminals on the Rigol DP3021 ...
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Equipment for analyzing large DC distribution system

I'd like obtain the transfer function of a large DC power distribution system. My question is whether there's equipment (like vector network analyzers) designed to assist with modeling these type of ...
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Steps for connecting femal-to-female sacrificial adaptor into a male connector in the RF measurement equipment

First of all, I am a newbie to the RF-mm-wave test equipments. I am trying to use this Agilent equipment shown in the image below where I want to connect a 1.85mm (F-to-F) sacrificial connector to the ...
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What's the minimum equipment rating required to perform testing in production environment? [closed]

I would like to purchase a Power supply to test my unit in production environment. The power supply is expected to support a production yield of 1 Million units per year. As per one of the test ...
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Generate spikes on RS485 bus

I was thinking to build some test equipment for a RS485 bus, but Would like to get some suggestions on how I can introduce bursts of spikes in a "safe" way without damaging the connected ...
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1 vote
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How to measure broadband noise

I need to measure the noise performance of an DAC + Amplifier combination. The system has a bandwidth of ~100MHz and the expected noise level is approx. 1-2 mV rms. What is the preferred instrument to ...
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Using Inductor and Electronic Load Instead of a Permanent Magnet Synchronous Motor (PMSM)

I would like to test whether my power board can handle to currents required to drive a 1.5 kW motor. My issue is that the motor testbench is still not here and I have to test it now. I do not have ...
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8 votes
2 answers
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Is there such a thing as a programmable power sink?

Is there such a thing as a power sink equivalent to a benchtop power supply, where I can set the wattage (voltage, amperage) to be consumed? What is this device called?
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Open-source DIY audio spectrum analyser and/or graphic equaliser

does anyone know of any OpenSource/DIY audio spectrum analyser projects can they direct me to an article, video, pics hackaday and instructionals style also I.C's old or new that i could/should try ...
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How to read different IV charts in the "component tester"?

I am doing a "comparison test" of 2 cards with the component tester. My component tester has 4 different test modes. LOGIC, LOW, MED and HIGH. LOGIC (10V 10mA), LOW (10V 100mA), MED (20V 5mA) and HIGH ...
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Efficiency test for motor drives

Hey I have a BLDC square wave controller. How to check the efficiency of the controller alone (not including the BLDC motor). Any suggestions ? I have checked with DC load test machine, but what I ...
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2 answers
129 views

Need Help Trouble Shooting A HP 8559A Spectrum Analyzer

I recently acquired an HP 8559A spectrum analyzer however instead of the HP182T display it was supposed to have it shipped with an HP180C display. I am unable to get the display to output a signal (I ...
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1 vote
1 answer
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Measuring 150kHz, ~30V peak waveform with good resolution

I am trying to choose test equipment for a systems test application and I am running into a road block with one of the specs I need to meet. The device features an H-bridge output similar to the ...
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How safe are voltage detector pens and how can I test one's safety?

I'm not an electrician and I have some basic understanding of how voltage testing pens work. I haven't had an incident with them before but I'm still quite concerned about their safety mechanisms. I ...
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2 votes
1 answer
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How do I shield PLB signals?

I am trying to refurbish an electronic personal locator beacon (for rescue callouts for stranded hikers/sailors/pilots). To do so to spec most devices require a GPS signal test (activation). There is ...
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Which adapter/handling to choose on (Type N) rf test devices when SMA/K cables have to be connected frequently?

I'm no expert in high frequency. But probably it is no good idea to change the adapters sitting on type N female output on and on as a torque wrench is used to fix them. But I have to make ...
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Will using magnetic base test indicators with breadboards cause electrical interference?

The situation leading to the question In the Quick Tips #8 // Precision Helping Hands YouTube Video, a "helping hands" with various names such as "Magnetic Base Adjustable Metal Test Indicator Holder"...
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How to efficiently mux many signals to/from a climate chamber?

I am building a setup to measure various parameters across a temperature range from -55°C to +125°C. The devices under test will be placed in a climate chamber. There are around 10 signals from each ...
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3 votes
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How to solder these tiny pogo pins?

I bought pogo pins to use for firmware uploading. So I have to make a Jig for my PCB, but this is the first time I use pogo pins. I have no ideas where I have to solder, I mean I want to know if ...
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