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14 Mar 2015

A look inside Flir’s Lepton thermal imaging sensor.

Flir Lepton extreme teardown – [Link]

14 Mar 2015

What’s inside Keysight’s new 34470A 7 1/2 digit Truevolt bench multimeter?
What are the PCB changes from the 34461A?
What voltage reference does it use to get 16ppm nominal accuracy?

EEVblog #723 – Keysight 34470A 7.5 Digit Multimeter Teardown – [Link]

8 Mar 2015

Pacemaker from the1970s using 4000 CMOS!

Pacemaker teardown – [Link]

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]





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