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8 Mar 2015

What’s inside a 2000 vintage Globalstar GSP1600 Tri-Band Satellite Phone? Behold the Erectile Antenna, a helical designed extending antenna.

EEVblog #721 – Globalstar Satellite Phone Teardown – [Link]

28 Feb 2015

In this video we are going to build an Arduino Uno clone in a breadboard using only 5 parts.

Arduino Uno (ATMEGA328P) on a breadboard – [Link]

28 Feb 2015

What’s inside the Keithley 2400 Source Measure Unit?

EEVblog #718 – Keithley 2400 SMU Teardown – [Link]

21 Feb 2015

Teardown, Analysis & Part-Salvage from an HP 70001A Series Optical Microwave Analyzer – [Link]

16 Feb 2015

by mjlorton @ youtube.com:

A catch for some new folks – Performance (waveform updates per second) drops off if you have a large enough horizontal offset / delay – this happens on most scopes.

The Keysight / Agilent struggles to Auto trigger on less frequent pulses. This is due to their Auto trigger rearm timer being very short…because the scope is fast.

The Keysight has a set of 5 GSa/s ADC’s and MegaZoom IV ASIC’s paired and hardwired behind channels 1 & 2 , 3 & 4 respectively.
This means that if you are only using two channels and you select 1 & 2…the sample rate is halved to 2.5 GSa/s and so is the waveform update rate. You need to select channels 1 & 3 to maintain the higher performance and sampling rate.
The Tektronix MDO3000 series allow you to select any two channels and maintain the higher sampling rate.

The new time correlated FFT (frequency domain) feature (FFT Gating) with a time domain signal suffers from a harware problem. If too much data is being parsed in the zoomed mode with FFT Gating, the FFT funcion will stop / hang / freeze.

Keysight MSO-X 3000T – Tips, Quirks and a Bug! – [Link]

14 Feb 2015

In this world exclusive episode, Shahriar visits Teledyne LeCroy to take a close look at the operation, teardown and experiments with the LabMaster 10-100zi, 100GHz simultaneous bandwidth, 240GS/s real-time oscilloscope. This instrument provides either a single 100GHz channel, or two 33GHz and one 65GHz digitizing channels. The instrument uses a frequency interleaving technique invented and implemented at LeCroy.

The block diagram and the theory of operation of the scope is presented. This includes the architecture of the 4x80GS/s ADCs and the triple frequency interleaving system. The teardown of the scope includes a close look at the ADC platform, the dual frequency interleaving (65GHz operation) and the triple frequency interleaving (100GHz operation). The experiments with the scope demonstrate the instrument’s capability to digitize signals up 100GHz using the beat frequency of two non-coherent lasers. The scope is also used to capture a 4pS rise time pulse from a femtosecond laser pulse system and a high-speed photo detector.

A complete factory tour is also presented where Teledyne LeCroy assembles all their oscilloscope products right here in the USA.

Experiments and Teardown of the Teledyne LeCroy LabMaster 10-100zi 100GHz, 240GS/s Oscilloscope – [Link]

9 Feb 2015

Back to basics introduction to the differential amplifier, aka the diff-pair, long-tailed pair, emitter coupled pair, etc. The basic operation of the circuit is presented, along with a simple mechanical simulation. Also, how the addition of current sources and mirrors can be used to address some of the performance issues, and begin to form the rudimentary beginnings of an op amp. This is the follow-up video from “teaser” video published earlier.

Back to Basics: the differential amplifier, aka long-tailed pair, diff-pair – [Link]

1 Feb 2015

In this episode Shahriar does an extensive review and teardown of the Keysight (Agilent) MSO-S Series 10-bit 20GS/s Oscilloscope. This scope supports bandwidths up to 8GHz and 400M points of memory per channel. With hardware 10-bit ADCs as well as an ultra low-noise front-end, this scope offers an impressive dynamic range on all four channels. All scope features are software upgradable.

The teardown consists of a close look at the acquisition board and the system blocks diagram. Various elements such as the ADC structure, FPGAs, memory and the time-base are all examines. The scope offers a +/-12ppb time-base with a 100fs jitter noise floor. Some basic performance measurements are also presented such as noise and SFDR.

The wireless experiment shows the performance of the scope in demodulating very low-power signals on an RF carrier. A -75dBm 2.5GHs QPSK signal can be demodulated by the scope. The instrument can also demodulate a 16QAM signal in presence of an interfering signal which is 44dB higher in signal power. All demodulation experiments are performed using the Keysight VSA.

The backplane experiments demonstrate the scope’s capability to perform jitter and noise analysis on multi-gigabit serial links. The built-in equalization software suites are used to find the FFE coefficients and those coefficients are used to perform hardware equalization in an FPGA communication link.

Review, Teardown and Experiments with a Keysight MSO-S Series 10-bit 20GS/s Oscilloscope – [Link]

26 Jan 2015

by mjlorton @ youtube.com

In this video I explain how a spectrum analyser (Tektronix MDO3000) can be used to view signals in the frequency domain vs an oscilloscope’s time domain.
I give an overview of the logarithmic scale and its benefits vs a linear scale.
I explain how compound wave forms like square and triangle are made up of harmonics.
I do a practical demonstration of how the spectrum analyser works with some example signals. I then show how this can also be done on an oscilloscope using the FFT (fast Fourier transform) maths function.

Spectrum Analyzer, Scope and FFT looking at Signals – [Link]

20 Jan 2015

Dave reviews the new Rigol DS1054Z Oscilloscope. Is this US$399 marvel really the best value budget oscilloscope on the market?

EEVblog #703 – Rigol DS1054Z Oscilloscope Review Summary – [Link]





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