Search results “Output ripple and noise measurement db”
What is Noise Figure & How to Measure It – What the RF (S01E05)
Learn how to see low level signals by adjusting this setting. Click to subscribe: http://bit.ly/Labs_Sub Learn more in the Spectrum Analysis Basics application note ↓ ► http://bit.ly/SpecAnBasics ◄ Like our Facebook page for more exciting RF content: https://www.facebook.com/keysightrf Check out our blog: http://bit.ly/RFTestBlog WTRF Eps. 4: https://youtu.be/mtSxfxjiHQM Learn more about using oscilloscopes: http://oscilloscopelearningcenter.com Check out the EEs Talk Tech electrical engineering podcast: https://eestalktech.com Like our digital counterpart’s Facebook page: https://www.facebook.com/keysightbench/ Twitter: @Keysight_Daniel https://twitter.com/Keysight_Daniel The signal analyzer we used: http://bit.ly/XSeriesSignalAnalyzers (The Keysight X-Series PXA 3 Hz - 50 GHz) The signal generator we used: http://bit.ly/XSeriesSignalGenerators Transcript: When working on your product’s design you’ll often want to optimize the sensitivity of your receiver. That’s where being able to characterize and improve your system’s noise figure becomes one of the important factors to consider. What’s up everyone!! The name is Nick Ben and I’m an engineer here at Keysight… and welcome to the 5th episode of ‘What the RF!’ In today’s episode we’ll be discussing noise figure, including what it is and how to measure it. Noise figure is one of the most important design considerations in the sense that it is a very efficient way to evaluate the performance of your device.. You can make noise figure measurements on complete systems or components. These include almost all multi-port devices from passive devices to active devices. Let's learn more about it. Noise figure is the degradation of the SNR as a signal passes through a system or device. Noise figure tells us the relative amount of noise being added to the signal. In our case, the device is this low noise amplifier. To calculate noise figure we determine the ratio of the respective signal-to-noise power ratios at the input and output of the device. Device must be at a reference room temperature of 290 degrees kelvin. Noise contribution in electronics is also caused by thermal agitation of electrons – or thermal noise. 290 kelvin was adopted by institutions as the standard temperature for determining noise figure. The noise figure value is a number expressed in dB and indicates the performance of a device’s internal components like this amplifier. A low noise figure is good and high noise figure is bad. We see an example of a signal at an amplifier’s input in (a) and at its output in (b). As you can see on the right, the noise level rises more than signal level due to the noise added by the amplifier’s circuits. This is the amplifier’s noise figure value. By knowing your device’s noise figure value you can calculate a system’s sensitivity from its bandwidth. Noise figure is a key parameter when handling small signals, and quantifies the network’s added noise. All you need to characterize your device’s noise figure is a signal analyzer, a noise source to calibrate with, and your device. For a noise figure measurement there are only 2 main steps you’ll need to follow – 1. Calibrate your test system; and 2. Measure your DUT’s noise figure Yes, it’s really that simple. As mentioned earlier in the video, the DUT we’ll be testing is this low noise amplifier, but we’ll first need to calibrate our signal analyzer. In this first step, we’re calibrating our signal analyzer. All we’ll need is a noise source and a signal analyzer. Switching over to the noise figure application on our signal analyzer, we see that our signal analyzer is uncalibrated, and we know this by the cal-state indicated at the top right hand corner. So let’s go ahead and calibrate this. Going into the measurement setup menu, we press the DUT setup & the calibration button. Today, we're just going to set up one DUT - this amplifier - which has a frequency range from 10 MHz to 1 GHz. But, I'm going to set the maximum frequency range parameters for the test to 3 GHz. By doing this, we'll be able to see the amplifier's performance roll off as we scan past its operating range. You can see where you would need to spec the amplifier. Now it’s time to measure the noise figure of our amplifier. To do so, we just have to remove the noise source from the front end of the analyzer and in its place connect the DUT, with the noise source at the input of the DUT. Looking at the graph here we see that our noise figure is a little above 6 dB and the gain is about ~20 dB which isn’t terrible … but ideally we would like to see our noise figure be under 3 dB. Noise figure is an easy measurement for characterizing a device’s signal-to-noise ratio (SNR) as a signal passes through a system or device. #noisefigure #noisefiguremeasurement #signalanalyzer #spectrumanalyzer #rfengineering #signalsource #signalgenerator #keysight #rfengineering
Views: 3599 Keysight Labs
#136: What is a dB, dBm, dBu, dBc, etc. on a Spectrum Analyzer?
This tutorial video gives the basics of the typical amplitude units used on a spectrum analyzer. It gives a basic description of the electronic definition of the decibel (dB), some of the properties of the dB, why it is used. It describes that the dB is a relative measurement. These relative measurements can be expressed as absolute measurements when a known reference is used/implied. This is where the terms dBm, dBu, dBmv, etc. come from. Finally, the term dBc is described. Each of the descriptions is followed with practical examples and demonstrations on an oscilloscope and spectrum analyzer. Notes from the video are here: http://www.qsl.net/w/w2aew//youtube/What_is_dBm_dB_dBc_etc.pdf
Views: 169600 w2aew
Measuring RMS Noise with an Oscilloscope
How to measure the RMS value of white noise with an analog oscilloscope
Views: 10611 David Long
EEVblog #49 - Decibels (dB's) for Engineers - A Tutorial
Are you a pessimist or an optimist? Dave explains dB's and how they are useful for us engineering types.
Views: 157151 EEVblog
EEVblog #528 - Opamp Input Noise Voltage Tutorial
Dave explains one of the most confusing parameters in an opamp datasheet, Input Noise Voltage Density, that mysterious nV/RootHz figure. Along with different types of opamp noise, corner noise frequency, and how to calculate output noise spectral density. And how to use a Dynamic Signal Anayser to measure the Power Spectral Density response over frequency of various opamps. Forum: http://www.eevblog.com/forum/blog/eevblog-528-opamp-input-noise-voltage-tutorial All EEVblog Opamp related videos are here: https://www.youtube.com/playlist?list=PLvOlSehNtuHu2FviAaZaiyXwN41G4b1Lf EEVblog Main Web Site: http://www.eevblog.com EEVblog Amazon Store: http://astore.amazon.com/eevblogstore-20 Donations: http://www.eevblog.com/donations/ Projects: http://www.eevblog.com/projects/ Electronics Info Wiki: http://www.eevblog.com/wiki/
Views: 91147 EEVblog
Crest Factor considerations when measuring AC signals with a Bench Multimeter
Understanding crest factors and how the effect an AC True RMS measurements. Keysight Digital Multimeters measure true rms and provide errors for various errors.
DC Voltage Measurement using Oscilloscope
When DMM (Digital Multi-Meter) or voltmeter is not available, the oscilloscope can be used for measuring DC voltage. Even after calibration and warm-up of the device, there may be a DC offset. Instead of using the builtin measurements, the cursor may be more accurate for measurement. Note for limits of the device which may cause damage of the oscilloscope and injury, so work within the specs of the device.
Views: 30808 ShellWave
Frequency Response Analysis using Oscilloscopes
Bode gain & phase, power supply control loop response Get the Power Supply Testing Toolkit ► http://bit.ly/2bRwmcW Click to subscribe! ► http://bit.ly/Scopes_Sub Application note: http://bit.ly/ScopesBode Thanks for watching the Keysight Oscilloscopes Webcast Series! Learn more about using digital storage oscilloscopes: http://oscilloscopelearningcenter.com Check out our blog: http://keysightoscilloscopeblog.com Like our Facebook page: https://www.facebook.com/keysightbench/ More about Keysight scopes: http://www.keysight.com/find/scopes Agenda: Power Supply Design Trends 2:08 Output Ripple 3:11 (output noise, PARD, Power Integrity) -common probes used 4:10 -Probing techniques & example measurements 6:39 --10:1 passive probe 7:56 --10:1 passive probe with probe socket 9:06 -Using FFT analysis to measure ripple 10:31 --10:1 vs 1:1 probe 13:29 --Use a Power Rail Probe (N7020A) 14:10 Power Supply Rejection Ration 18:58 (Power Supply Ripple Rejection) -Physical Setup 21:21 -Setting up a PSRR measurement 22:47 -Measuring PSRR 24:40 -Oscilloscope vs Network Analyzer (VNA) 26:08 Control Loop response measurements 27:02 -Power supply transient response analysis 28:02 -DC-DC converter block diagram 28:19 -Typical Loop Gain Measurement 29:40 -Control loop response measurement configuration 31:42 -Control loop response physical test setup 34:00 -Setting up a control loop response measurement on the oscilloscope 34:46 -Control Loop Response (Bode plot) - Gain plot 36:17 -Control Loop Response (Bode plot) - Phase plot 37:47 -Manual phase margin measurement 38:52 -Oscilloscope vs Network Analyzer (VNA) 39:36 Oscilloscope vs Network Analyzer overview 40:30 Review & summary 44:31 Keysight Oscilloscope Portfolio 45:18 Recommended probes for power supply measurements 47:05 Additional Technical Resources 49:13 Live Q&A 50:28 2-Minute Guru playlist: https://www.youtube.com/playlist?list=PLzHyxysSubUkc5nurngzgkd2ZxJsHdJAb Download free 30-day trials of Keysight's design & test software at http://www.keysight.com/find/free_trials
Views: 4006 Keysight Labs
Measuring and Visualizing High Crest Factor Power Signals with an IntegraVision Power Analyzer
Measuring and Visualizing High Crest Factor Power Signals with an IntegraVision Power Analyzer http://www.keysight.com/find/Integravision Measure high crest factor signals requires an instrument with a high dynamic range. The PA2201A Power Analyzer provides 16 bit dynamic range for greater flexibility and accuracy. In this video, two signals with high crest factors are measured. The first signal simulates a switching power supply with a crest factor of almost 3:1. The second signal is of a full wave bridge rectifier with a high signal to noise ratio. IntegraVision power analyzer is an intuitive combination of accurate power measurements and touch-driven oscilloscope visualization. Within a single instrument, it delivers the dynamic views you need to see, measure and prove the performance of your design. Get your design and validation work done quickly, accurately and confidently with IntegraVision’s ability to address multiple test scenarios with the flexibility of wide-ranging, isolated inputs. Visualize transients, in-rush currents and state changes with a high-speed digitizer that captures voltage, current and power in real time. Analyze power losses in the time and frequency domains using full Nyquist rate-based computations.
Biamp Audio 101 - Measurements & the dB: Signals, Peak, RMS & Crest Factor
Parameters we measure in audio signals including: signals, peak, RMS, crest factor, and amplitude. For more information please visit http://biamp.com/products/index.aspx Subscribe to our channel: http://bit.ly/1ZP9WxA Like us on Facebook: http://on.fb.me/1nAMSBq Tweet us on Twitter: http://bit.ly/1JZSZt8 Follow us on LinkedIn: http://bit.ly/23hcuUv With hundreds of thousands of professional audio systems installed in more than 100 countries throughout the world, our systems make human voices and other sounds resonate clearly and naturally. We are a leader in audio conferencing, video conferencing solutions, small business phone systems, PA systems, and audio systems.
Views: 3529 Biamp
How to measure Buck converter loop gain and phase
The tutorial video “How to measure Buck converter loop gain and phase” will explain the basics of control loop measurements and will show you how to use the PicoScope with a Frequency Response Analyzer (FRA) utility which you can download at https://bitbucket.org/hexamer/fra4picoscope/downloads/ We’ll also explain how to make the signal injection transformer that you need for this measurement. The video gives many practical tips and examples on converter stability measurement that can also be applied to many other converter types. The Buck converter prototype tutorial video that is mentioned in this video can be found here: https://www.youtube.com/watch?v=l9CWE6rGXG8
How to Select the Right Probe Bandwidth - Probing Pitfalls
What bandwidth oscilloscope probe do you need? 1-Click Subscribe! ► http://bit.ly/KLabs_sub ◄ Learn more about probing: ► https://bit.ly/2pIheVn ◄ If you don’t have enough bandwidth in your probe, you won’t be able to see your true signal. Therefore, any of the measurements you make could be false, leading to errors and poor engineering decisions. In this episode of Probing Pitfalls, Erin explains the dangers of choosing a probe with the wrong bandwidth and walks you through what bandwidth is, how much you need, and the consequences of choosing the wrong bandwidth. She explains: • How the 3dB point determines bandwidth specs • How rise time of your signal determines how much bandwidth you need • Why harmonics determine the bandwidth needed for square waves • Why system bandwidth is the ultimate restriction on your test bandwidth Stay tuned for future Probing Pitfalls episodes covering common probing mistakes and how to avoid them. You’ll be on your way to making more accurate measurements. Ask Erin questions on Instagram: @keysightoscilloscopes Learn more about using oscilloscopes: http://oscilloscopelearningcenter.com Check out the EEs Talk Tech electrical engineering podcast: https://eestalktech.com More about Keysight oscilloscopes: http://bit.ly/SCOPES Check out our blog: http://bit.ly/ScopesBlog Follow us on Twitter: @Keysight_Daniel https://twitter.com/Keysight_Daniel Like our Facebook page: https://www.facebook.com/keysightbench/ Probing Pitfalls is hosted by Erin East and Melissa Spencer. The video series covers common oscilloscope probe pitfalls, the impact they have on your designs and measurements, and how avoiding them can improve your test results. You’ll learn proper probing practices that will save you time in validating and debugging your designs, plus improve your overall knowledge and skill in the test lab. #oscilloscope #oscilloscopes #bandwidth #bandwidthproblems #probing #oscilloscopeprobeing #probe #oscilloscopeprobes
Views: 3708 Keysight Labs
EEVblog #24 - Chopper Operational Amplifiers
A tutorial on the secret world of Chopper (auto-zero) Amplifiers.
Views: 76529 EEVblog
Power Supply Rejection Ratio (PSRR) Measurements using an Oscilloscope
Learn how to perform Power Supply Rejection Ratio measurements using an oscilloscope to test your power supply's ability to reject various components of frequency on the input of DC-to-DC converters. Learn more! ► http://www.keysight.com/find/scopes-power Click to subscribe! ► http://bit.ly/Scopes_Sub The mixed signal oscilloscope we used: https://keysight.com/find/3000T Learn more about using oscilloscopes: http://oscilloscopelearningcenter.com Check out our blog: http://keysightoscilloscopeblog.com Like our Facebook page: https://www.facebook.com/keysightbench/ Download free 30-day trials of Keysight's design & test software at http://www.keysight.com/find/free_trials
Views: 2981 Keysight Labs
#84: Basics of Ferrite Beads: Filters, EMI Suppression, Parasitic oscillation suppression / Tutorial
This video discusses the basics of ferrite beads, and their uses for basic filtering applications. It discusses and demonstrates how ferrites act as resistors at high frequencies, and how this is used for EMI/RFI Suppression, improved power supply filtering, parasitic oscillation suppression, and others. The affect of the frequency dependent resistive characteristic of the ferrite beads is demonstrated by showing its effect on a swept RF signal, its effect on the rise/fall time of a digital signal, and its effectiveness of eliminating parasitic oscillation. Here are some links to the other videos mentioned in this video: Harmonic content of square waves: http://www.youtube.com/watch?v=eC36AqL5mw8 Analog Oscilloscope Bandwidth Considerations: http://www.youtube.com/watch?v=oZ1Dv2dVGkU
Views: 232722 w2aew
Optimizing On Wafer Noise Figure Measurements to 67 GHz | IMS 2013 | PNA-X
Accurate noise figure measurements at microwave frequencies are challenging, especially for on-wafer devices. This presentation shows how to use a PNA-X to make the highest accuracy on-wafer noise figure measurements up to 67 GHz. Included topics are: 1. Overview of the PNA-X noise figure technique and new 50 GHz noise receiver and built-in tuner 2. Calibration methods, including a new power-sensor-based calibration 3. Extending the accuracy of vector-noise calibration to the probe tips 4. Use of external amplifier and filter for the 50 to 67 GHz band To learn more about PNA-X Network Analyzers, visit http://www.keysight.com/find/pna-x - - - - This video was filmed at the IMS 2013.
Using the Fluke 190-502 Scopemeter to measure electrical noise
The Fluke 190-502 Scopemeter is a battery-powered, handheld oscilloscope with lots of functionality in a small package. In this video we look at its ability to detect electrical noise in the power supply.
Views: 33758 Design World
#135: Measure Capacitor ESR with an Oscilloscope and Function Generator
This video discusses how to measure the ESR (equivalent series resistance) of a capacitor using an oscilloscope and function generator. All of the capacitors tested in this video were 220uF electrolytic caps. In reality, the resistance in the plates of a dried out electrolytic capacitor can't be modeled as a simple series resistor, but for the purposes of identifying good from bad, this simplification works fine. In the video, I show the ESR meter that I made in 2006. The video for that is here: http://www.youtube.com/watch?v=bmYAgat-sOQ A copy of the video notes can be found here: http://www.qsl.net/w/w2aew//youtube/Measuring_capacitor_ESR.pdf
Views: 156750 w2aew
#67: Basics of Common Emitter Amplifier Gain and Frequency Response with Measurements
This video shows a simple common emitter amplifier based on a 2N2222 NPN transistor, and reviews how to calculate the gain and frequency response of the circuit. The video is NOT intended to take a deep dive into the design considerations for the amplifier (The Signal Path Blog site already did a fine video on that). I discuss the basic equations for calculating the the in-band gain, as well as the low- and high- corner frequencies of the frequency response. All of these parameters - DC bias levels, bias currents, in-band gain and frequency response are then measured and shown. Notes in the video can be found here: http://www.qsl.net/w/w2aew//youtube/Freq_response_common_emitter_amplifier.pdf
Views: 126802 w2aew
Measuring Global Negative Feed Back (NFB) In The Dynaco Mark III
Documenting the amount of global NFB in a well respected vacuum tube amplifier.
Views: 1626 ElPaso TubeAmps
re: QEG power measurements: Peak to peak power readings Vs RMS power readings
A common mistake when measuring AC power values is to use meters that are not able to measure the difference in phase (timeing) between the peak of the voltage wave and the peak of the current wave. Even if you have huge voltage and current peaks if they are not at the same time then the ammount of watts you have is very low, or, the total value of the power over a very long waveform can be much lower then the peak to peak value, which is why we need RMS (root mean squared) functions applied to the waveforms on the scope to create RMS power values. Mr. Jalepino, Techical Moderator for The Sustainable Media Co-operative Consortium (www.sustainablemedia.co) explains in more detail. www.sustainablemedia.co/qeg for more
Views: 620 Charles Fraser
Hantek dso5072p Power Supply Fix
So I came across this oscilloscope at my local charity shop for the grand total of £20. As you may have guessed from the price it does not work. I suspected that it may be a power supply issue but could not be 100% until I opened it up. As you can see in the video it has had very little use but it turned out to be a very easy fix.
Views: 17621 andrew mcneil
Power Supply Control Loop Response Measurements using an Oscilloscope
Learn how to perform control loop response measurements (Bode gain and phase plots) to test the stability of closed-loop feedback networks of switch mode power supplies. Learn more! ► http://www.keysight.com/find/scopes-power Click to subscribe! ► http://bit.ly/Scopes_Sub The mixed signal oscilloscope we used: https://keysight.com/find/3000T Learn more about using oscilloscopes: http://oscilloscopelearningcenter.com Check out our blog: http://keysightoscilloscopeblog.com Like our Facebook page: https://www.facebook.com/keysightbench/ Download free 30-day trials of Keysight's design & test software at http://www.keysight.com/find/free_trials
Views: 5182 Keysight Labs
Epcos B84110B Filter
Epcos B84110B FilterWhen you choose which filter to buy, you should take account of key parameters. They include:• the purpose of a system with which a filter will be used (switched power supplies, converters, electric motors or industrial electronic equipment);• the supply voltage type -- either direct or alternate• the mains voltage;• the current absorbed by a end device;• the required noise suppression level; and• The number of phases in the network or in the line.Generally, a single-phase network includes two power lines with or without a grounding circuit. Such network options required double-wire filters.Let me describe V84110-B-A14 filter.This is a double-wire filter for single-phase AC networks with the voltage of 250 Volts, frequency of 50-60 Hz and the current of up to 1.4 A.It contains a compensated current choke and noise suppression X-capacitors that are used to compensate for asymmetric interference that prevails at the frequencies above 1MHz.Key features are as follows:• asymmetric interference suppression level is 40 dB at 100 kHz;• plastic housing;• print board mountingIts prospective applications include:• switch mode power supplies;• TV sets;• Low-power digital systems and industrial electronic equipment.This filter is an autonomous complete unit installed before the receiving device.Note that network filters are subject to special electric safety requirements. To this end, EPS0S filters are produced in strict compliance with the standards adopted by the International Electromechanical Commission (IEC) and are subject to special tests in various national centers, for instance, in Germany, Canada or United States.Filters certified by safety laboratories have respective labels.
Views: 86 ChipDipvideo
AD8599 Two-Channel Ultra-Low Noise Amplifier ...
AD8599 Two-Channel Ultra-Low Noise Amplifier with Ultra-Low Distortions AD8599ARZ is a two-channel ultra-low noise amplifier with ultra-low distortions produced by Analog Devices. It includes 2 operating amplifiers used to process high quality audio signals and to minimize noises and distortions. Amplifier offset is minimum 10kW. Distortion level (THD) is about 120 dB at 1 kHz. The amplified has the following features: •noise level: maximum 1.1μV; •bandwidth: 10MHz; •useful current of each amplifier: 4.8mA; •bias voltage: maximum 10mW; •supply voltage: +- 15V; •temperature range: -40 - +125°С; •SOIC8 compact case. The integrated circuits are used in professional audio preamplifiers, minute test gauges, medical equipment, minute detectors, and high precision industrial equipment.
Views: 1490 ChipDipvideo
Using the HP8568B Spectrum Analyzer with the HP8444A Tracking Generator
[Edit: I got even better performance out of it, check my update here: https://www.youtube.com/watch?v=qoMJXwRv-v4] I was curious how an HP8444A tracking generator option 59 would work with a HP8568B spectrum analyzer. Answer is: much better than anticipated. These units were not really designed to work together, as you can tell from the cabinet design that doesn't even match at all (but the design is an exact match for the older 8554B spectrum analyzer). They are a generation or two apart, one is a relatively simple all analog tracker, the other a very sophisticated, reference locked, computerized machine. That said the option -59 did add the 500 MHz local 3rd LO oscillator and extended operation to 1.5GHz, so the two match in range and operation. I wasn't expecting too much, and the tracker says it's only good down to 10 kHz resolution bandwidth, I presume due to the drift of the analog oscillators. But actually it is much better than that. The output is rather flat, stable enough to measure down to a 1 kHz resolution bandwidth. And with an external synthesized 500 MHz 3rd LO, I could go down to 300 Hz. Not bad for an old analog horse! This HP equipment was really well designed. Caveats: you have to use Shift-T on the 8568B for the thing to work across all spans and frequencies, in order to lock the spectrum analyzer 1st LO to the down frequency. If not it will jump up and down 4 MHz and the tracker will be off. Here I show how to calibrate out the small remaining flatness ripples, how to use it with the internal and external 500 MHz 3rd LO, and do a test measurement on a quartz crystal, just because I can.
Views: 6284 CuriousMarc
2.4 GHz to 2.5 GHz WiFi Wattmeter
A nice performing WiFi RF watt meter capable of measuring up to five (5) watts. The line section and sensing element is made of 3/4 inch copper water material. The output drives a 30 uA meter movement or sensor.
Views: 2562 ElPaso TubeAmps
LTspice IV:  Noise Simulations
Tyler Hutchison, Applications Engineer LTspice IV (http://www.linear.com/ltspice) can perform frequency domain noise analysis which takes into account shot, thermal and flicker (1/f) noise. The resulting noise density (in units of volts per square root hertz) can then be plotted to aid in circuit analysis and understanding. This video covers how to setup a .noise simulation in LTspice to view both input and output referred voltage noise and discusses a couple of tricks to learn more about noise contributors.
Views: 27990 LinearTechnology
Monte Tut #04 SPECIAL - Peak & RMS demystified
PEAK & RMS demystified, this is a supplement to the previous Tutorial. It continues were we left off explaining these 2 loudness factors in greater detail, more perspicuous examples and a revealed secret about the craft of making loud sounding mixes. subscribe: http://www.youtube.com/subscription_center?add_user=MonteMusicChannel please like and follow: https://www.facebook.com/MonteMusik https://twitter.com/MonteMusik
Views: 1541 MonteMusicChannel
WeBoost Connect 3G vs MyMB Mobile Signal Booster - Part 1 (Booster and Accessories Exterior)
We are professional Mobile Signal Booster / Repeater solution provider in Malaysia, we carry MyMB mobile signal booster product, weBoost product (weBoost Connect 3G & etc) as well as other brand mobile signal booster. We made this video to compare weBoost Connect 3G and MyMB Extreme 2G + 3G mobile signal booster. The motivation for us to make this video is that some of our customers told us that they approach other mobile signal booster supplier, and the supplier told them weBoost Connect 3G or other unknown brand booster’s power is much stronger than MyMB product, and these customers want us to show the booster specs for comparison. But the problem is, we do not publish MyMB technical specification on the website. We do this purposely to protect consumers, because those technical specs items such as Gain, Output Power, Noise Figure, VSWR, Pass Band Ripple and etc, 99.9% of consumers actually do not understand what they are and could not measure it or feel it, so some unknown brand competitors make use of this point. They anyhow write output power as 27 dBm although actually the output power of the booster is only less than 10 dBm, because they know consumers do not know how to measure the output power and they cannot feel it. Consumers will just compare the price and “don’t know what” specs of Product A and Product B, if the specs is same and product B price is much lower, then they will surely go for product B, without knowing that they are cheated by those fake specification. We do not publish MyMB technical specs on website, so consumers could not compare the specs they get from other suppliers with our products, what we provide to customers are the reference projects and testimonials from other customers, and release those information that could be understood by customers, information such as coverage area and mobile phone signal strength in dBm as shown in the video. (dBm in negative value, smaller the number mean signal is stronger, e.g. -57dBm stronger than -75dBm) In this part 1 of video, we show the detail dimension and weight of the booster and accessories from weBoost Connect 3G and MyMB Extreme 2G + 3G, these booster and accessories will later be used to setup a system in Part 2 of video for performance comparison between weBoost Connect 3G and MyMB Extreme 2G + 3G. For mobile signal booster, we would recommend users to choose either from MyMB product or weBoost product instead of other unknown brand, as such unknown brand may cause interference to telco cell tower and bring serious consequences. Except for cellphone signal booster / repeater product, we also carry telephone system product (GSM to landline converter, PABX etc), Smart Home Product (WiFi controlled smart switch & etc.), WiFi Product (4G LTE modem router, WiFi extender & etc.) Please visit to our website http://www.MyMobileBooster.com for more information.
Views: 376 Wee Sien Hong
Monte Tut #04 - Peak & RMS in depth
PEAK & RMS explained, why it is so important to us and how we can use it ! These examples use only built in instruments, no external analog units. Enjoy and don´t 4get to leave a comment ! Any Questions can be answered here or on my FB page: subscribe: http://www.youtube.com/subscription_center?add_user=MonteMusicChannel please like and follow: https://www.facebook.com/MonteMusik https://twitter.com/MonteMusik
Views: 2865 MonteMusicChannel
EEVblog #509 - Rigol DP832 Lab Power Supply
Dave gives his initial impression on the Rigol DP832 triple output 195W lab power supply. Forum: http://www.eevblog.com/forum/blog/eevblog-509-rigol-832-lab-power-supply/ EEVblog Main Web Site: http://www.eevblog.com EEVblog Amazon Store: http://astore.amazon.com/eevblogstore-20 Donations: http://www.eevblog.com/donations/ Projects: http://www.eevblog.com/projects/ Electronics Info Wiki: http://www.eevblog.com/wiki/
Views: 160918 EEVblog
Measuring RMS of a signal with LTspice
Measuring RMS of a signal with LTspice
Views: 5823 David Parent
What is Crest Factor?
What is crest factor? Why is crest factor important when selecting an AC power source? These are common questions heard by our team at AMETEK Programmable Power. Let our Product Marketing Manager, Eric Turner, explain the answer to you. Crest Factor is the relationship between peak current and RMS current. If you are unable to deliver the peak current of your requirements the power source will shut down. This is why it is important to remember the crest factor when selecting an AC Power Source. For more info please visit http://www.programmablepower.com/
THEORETICAL PHYSICS: (m^3/dB)(pdVolume)   p=As/m^2    dB = DECIBEL
J/Vm = V/N = (Nm^2)/C^2)/V = Tm^2/(Ohm/m) = m/As Charge density Q = (m^3/(dB)^2)(pdVolume) = m/[As(dB)^2] , p = As/m^2 Decibel = dB, W/m^2 = (dB)^2, Wb/m^2 = 0dB. F= qE + qvB = Kgm/s^2 = Force x Acceleration E = A/s + Kgm/As^3 E = -4PiDd + v x H : E=msqrtD D contains v x H as m/A.s x m/As Where m/As is the energy tensor fields motion parameter. Poincare's Transformation states that Dimension^2 = m^2+m^2+m^2-c^2.t^2. By making c^2= m/A.s where A= Ampere and t^2=-m/A.s x m/A.s, we get a measurement similar to a Henry m^2/2A.s^2. Which I will call a Dunn D=m/A.s. Multiplying by itself, m/A.s to infinity causes the motion and heat to increase at an exponential rate. The first term is negative, the electric potential repeatedly changes from positive to negative.Which causes the particle to physically oscillate.-m/A.s x m/A.s repeating to infinity. The motion of the field is related to these states: 1.Permittivity 2. Permeability 3. Immittivity . These states are governed by the fact that meters can only be considered in three states meter, meter^2 and meter^3.The final outcome is m^3/s, which is flow rate. When the resistance of the system approaches zero, a new field is produced. It is known as emittivity (radiant flux). It is comprised of spectra measured by a metric and luminosity measured in watts. If we consider all these things together, the directional forces of susceptance /reactance and luminosity with the sine waves of the other properties, pulses or sound waves can be produced. Which in turn can produce mass. Confirming Einstein's mass energy equivalence E= mc^2. Conductance Amperage A Voltage V, A = Kg/s^3 Permeability Inductance Emittance 1/H or W/m^2 = Kg/s^3 Coercesivity Permeance H Reluctance 1/H Retentivity Remanance Wb Saturance 1/Wb Vs = Wb Contrivity Responsivity Detectivity On/Off Permittivity Capacitance F/m Elastance m/F Density Volume Mass Kg/m^3 Momentum Propulsion Trajection p=mv Immittivity Conductance S Resistance Ohms Length Admittance S Impedance Ohms Acceptance Susceptance Reactance Ohms or m/s Emittivity Spectra Hz Luminosity W Gravity Density Kg/m^3 Bandwidth 1/s^2 Entity Entropy J/K Enthalpy mol/g W to Ohms x W to F = 1/s = Hz. An inverted watt is different to a farad by an A^2s. The watt is related to the volt by 1/ A. The watt to the ohm is 1/ A^2. The watt to the henry is s/A^2. To the weber is s/A. And finally to the Joule by seconds or as a variant of time. 1/Newton x Siemen =m/A^2s. J/V x m = m/A.s. V/N = m/As This can also be reduced to kg=m^3, m=s^3, 1/s^3=s. HEAT GENERATION (A^2 x K from 1/J = A^2/kg, Specific heat = J/kg.K.Conductivity/Diffusion = Delta x Delta T = Delta^2.T ) W/m^2 = (dB)^2 = Kg/s^3 Phonic Velocities c = 330 m/s The two major manipulations of conductance are attenuation, measured by frequency Hz and conjugation measured by amperes, volts and ohms. Conductance is a 3 phase cycle. Capacitance is a 4 cycle system, measured in farads. Inductance is a 5 cycle torque system, measured in Henries . A simple repeating rhyme expresses these cycles. Conjugate the positive, attenuate the negative. Attenuate the positive and conjugate the negative. THE SUN A 27 million degree fahrenheit plasma spheroid six times as dense as gold. It fuses 700 million tons of protons into helium nuclei every second. The core throbs gently, expanding when fusion rates climb and contract when they damp down. There is an eleven year sunspot cycle. photons at the suns core are carried outwards 100,000 years to the surrounding conduction zone, 70% of the way out from the solar center. After a month or so more they emerge into the photosphere, the part of the sun we see. It takes 8 minutes to reach the earths sunlight from there. The sun rings like a bell in millions of distinct tones. The tones generate ripples on the suns surface. Detectors can probe 40,000 miles beneath the solar surface. Global magnetic field lines encircle the sun from pole to pole like a bird cage. Energy equivalent to millions of megatons of TNT spew x-rays and gamma rays into space. Coronal mass ejections reach earth in a normal span of 40 to 60 hrs. Clearing a path in the solar wind for the second wave to make the trip in a mere 17 hrs.Squashing the earths magnetosphere from 40,000 to 4,000 miles.
Views: 123 ROBERT DUNN
Ripple Relay Receiver
I have had various questions regarding what does the Zellweger ripple control at the other end. A couple of thousand of these ripple relays. Here we have the ripple relay on a domestic meter board which controls the hotwater heating and the meter tariff change over to the low rate. At the beginning a Zellweger ripple plant star delta contactors can be seen in operation, as well as a motor generator installation. The tariff switches over at 2:20 The control relay picks up a 1050 Hz signal from the mains and does the remote switching. I created this video with the YouTube Video Editor (http://www.youtube.com/editor)
Views: 22742 RODALCO2007
Cyrob : Home made Tektronix TM500 extenders (In english)
Vidéo exceptionnellement en Anglais. Pas d’inquiétude, ma chaine est et restera en Francophone... Elle est destinée, entre autres, aux membre de l'excellent forum "All about classic Tektronix CRT o'scopes" sur Yahoo. Incontournable si vous possédez du vieux matos Tektronix. Visitez mon site : http://www.Cyrob.org
Views: 1802 Philippe Demerliac
Peak and RMS
Video explaining the music production concepts of Peak volume and RMS volume. For more videos like this visit http://www.mxmethod.com
Views: 4326 MrHarryhughes
Understanding Common Mode DMM Specifications
Describes DC and AC common mode specifications (DC CMRR, AC CMR) for Keysight's DMMs and shows how they are calculated. For more information on Keysight Digital and Bench multimeter see: http://www.keysight.com/find/34401a http://www.keysight.com/find/34410a http://www.keysight.com/find/34411a
NI Multisim: AC Analysis frequency response
Set up an AC Analysis to plot the frequency response (both magnitude and phase) of a circuit.
Views: 107513 NTS
eevBLAB #52 - My Personal Data STOLEN from the Government!
All my personal data was STOLEN from the Western Australian Government's Perth Mint thanks to a third party data breach. Obvious serious identity theft implications for customers as a result. UPDATE: They have disabled comments and ratings, LOL! https://www.youtube.com/watch?v=mAERAUbCb8c Perth Mint CEO: https://www.youtube.com/watch?v=UsjHlgTchnE Forum: http://www.eevblog.com/forum/blog/eevblab-52-my-personal-data-stolen-from-the-government!/ EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog Stuff I recommend: https://kit.com/EEVblog/ Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3 💗 Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3
Views: 38186 EEVblog
LDO basics: Power Supply Rejection Ratio (PSRR)
Visit the TI LDO homepage to learn more about the TI LDO Portfolio. http://ti.com/ldo This video will go over what *P*ower *S*upply* R*ejection *R*atio (PSRR) is and will explore an application in which one can calculate the PSRR. The PSRR calculations follows a formula in which one can find the values to the equation either from the electrical characteristics or from the PSRR versus frequency plot provided in the data sheet. The video also highlights the importance of output capacitors and the difference between the input voltage and output voltage as these parameters can affect the PSRR value. Other factors than can influence PSRR value also include noise reduction capacitor, feed-forward capacitor, and PCB layout.  Need Help? Visit the support and training tab from the LDO homepage. http://www.ti.com/power-management/linear-regulators-ldo/support-training.html Read the corresponding blog post, LDO Basics: power supply rejection ratio. http://e2e.ti.com/blogs_/b/powerhouse/archive/2017/03/03/ldo-basics-power-supply-rejection-ratio
Views: 1308 Texas Instruments
Capacitor testing basics. Don't use a multimeter. Here is why.
Capacitor testing basics. Don't use a multimeter. Here is why.
Views: 356608 Kev31779
1932 National SW-58 regenerative receiver restoration
This is the very first peek at this receiver as received. It is a regenerative receiver with tuned RF amplifier, and ganged one-hand tuning. There is an antenna tuning control (left), RF gain control (middle left), the main tuning (middle right), and the regeneration control (right). This allows maximum signal to noise ratio, and a method of reducing the input to the regenerative detector for strong signals, so that it may continue to be operated at the maximum selectivity position of regeneration. Type 58 remote pentodes are used. The first audio stage is an impedance coupled 27 triode, and a transformer coupled class A push-pull power amplifier with 45 triodes follows. UPDATES NOV. 28/16: The output transformer S-11 was swept using a 600 ohm audio generator on half of the primary, and a 5000 ohm secondary resistive load: FLAT (+/- 1 dB) from 10 kHz all the way down to 10 Hz !!! The radio was then powered up: +325V plates, + 52V cathodes, +273V effective plate voltage. 750 ohm cathode bias resistor = 35mA plate current each 45 triode, resting and full power (remember class A). The audio output stage provides 320Vp-p or 2.6 watts of clean audio 1%THD into a 5000 ohm resistive load! (I was expecting 4 watts. The output transformer S-11 has an impedance ratio of 18000 ohms p-p to 6250 ohms, however the d.c. winding resistance of the secondary is 1020 ohms, resulting in 20% power loss internally, and on top of this I suspect the RCA tube handbook allows a 5% distorted waveform to get the 4 watts. Nevertheless, this transformer design tradeoff results in a flat frequency response from 10 kHz down to 10 Hz in my sweep test with or without the d.c. primary current of the tubes!!!) The driver transformer S-51 is almost as good. With a 9000 ohm source resistor and signal generator (simulating the 27 driver tube plate resistance), I measure a response (+/-3dB) from 40 Hz to 8 kHz. However when the radio is powered up, with an input to the 27 grid I notice a severe low frequency fall off of the overall radio: -3 dB 200 Hz, -10 dB 80 Hz. UPDATE: The cathode resistor bypass capacitor (0.5 uF/2000 ohms) is not large enough, so the effective plate resistance of the 27 driver increases above 9000 ohms, and since the unbalanced current carrying driver transformer primary impedance is falling also, severely shunts the audio frequencies below 200 Hz. Perhaps a deliberate hum reducing design? UPDATE: I added another bypass capacitor, 8uF, across the driver cathode resistor. Overall radio response -3dB 7 kHz, -3dB 90Hz, -6dB 50Hz. The unbalanced current in the primary winding must be reducing inductance. Added an 8200 ohm resistor across the primary, penalty is 6dB gain, but improved flattening of the response: -3dB 7.5 kHz, -3dB 50 Hz, -6dB 30Hz. Very good! In fact, with the bass-boosting effect of the regeneration control set for AM operation, this will sound high-fidelity in a good 5000 ohm National speaker. First conclusion: this receiver from 1932 was the earliest equivalent of the later 1935-1950s push-pull 6F6/6V6 shortwave superheterodyne receivers with many more tubes, such as the National NC-100/101, HRO-50/60, NC-183, and Hallicrafters SX-42, SX-28, SX-62. To have that in 1932, just a few years after the best receiver was a UX-201A detector triode and audio headphone amp, was nothing short of revolutionary. The famous James Millen designed this receiver. This is not a toy broadcast receiver, but a serious shortwave instrument with both general coverage and amateur bandspread plug-in coil sets available. If you couldn't work Australia from North America with this set, you couldn't with any other set either. This receiver was the last of the original National regenerative designs, following the SW-4, SW-5 and SW-45 models. Incidentally, the SW-5 was available with push-pull 27 or 45. The choice was based on low current drain of the 27s, resulting in lower ac ripple from the power supply, and the ability to connect headphones there too if one needed super gain without dangerously blasting ones ears off, vs. the 45s increased power and fidelity using flatter transformers for broadcast stations. In practice, the 45s were fine, no added ripple with a good supply and no one in their right mind would connect headphones to a push pull power amp driven by a howling regenerative receiver anyway! The smaller SW-3 omitted the push-pull stage and production continued well into the war years. In my opinion, the SW-58 is the most aesthetically pleasing design. Many ARRL handbook receiver designs in the 1930s were based on this. *** Stay tuned for RF testing! ***
Views: 379 radiowave
Hack Audio: Peak Amplitude
The peak amplitude (or peak magnitude) is a measurement of the maximum level of a signal. This video demonstrates the process to analyze a signal by taking the magnitude (absolute value) and the max. Check out http://www.hackaudio.com/ for more information.
Views: 136 Hack Audio
EEVblog #25 - The Infinite Resistor Puzzle
Dave solves the famous Infinite Resistor Puzzle, the old fashioned way...
Views: 70735 EEVblog
PWM of LEDs and Response of the Human Eye Combined
A quick tutorial on why the PWM of lighting doesn't seem to be linear. In this video I explain a bit about how the eye perceives brightness and how we can modify our PWM output to provide an approximately linear output in perceived brightness to our eyes. The code for this demo (Arduino sketch) can be found here: http://www.burke.tv/Tom/Cookbook/Arduino/NeoPixel/BrightDemo/BrightDemo.ino
Views: 339 Tom Burke
FCPX- Final Cut Pro X - Audio Levels- Consistent Audio Levels- No Quiet Or Loud Spots
one of the more frustrating things about editing video is to make it so the sound sounds similar throughout the video. in other words, to make it so the audio levels are consistent. With FCPX - Final cut pro X, this is very easy to do. Simply use the limiter filter to make the levels consistent throughout the whole video, no more loud or quiet spots. http://www.mattytripps.com
Views: 19925 matty tripps
FRA How to - Power Supply Rejection Ratio
Use the Cleverscope Frequency Response Analyser to measure the Power Supply Rejection Ratio (PSRR) of a power supply with the CS1070 Power Amplifier. It can manage up to 1A output current over a voltage range of -18V to +30V over a frequency range of DC - 52 MHz. This is sufficient to directly measure many power supplies. If this is not enough, you can inject across a low value series resistor (eg 0.1 ohm). This video shows you how to connect up a CS328A-FRA and CS1070 to measure the PSRR of an LTC3589 over the frequency range 200 Hz - 10 MHz.
Views: 607 Cleverscope

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