Category Archives: The Signal Path

TSP #96 – Dino-Lite USB Digital Microscopes Review and Experiments (2017 Edition)

In this episode Shahriar demonstrates a series of new Dino-Lite USB Digital Microscopes released in 2017. Several models are shown:

AM7515MT8A – This unit offers 700X-950X magnification with built in coaxial lighting as we as switchable bright-field and dark-field lighting options.

AM73915MZT – USB 3.0 interface with one touch auto-focus, EDOF & AMR. The Continue reading TSP #96 – Dino-Lite USB Digital Microscopes Review and Experiments (2017 Edition)

TSP #95 – Teardown, Repair & Analysis of an Agilent E4443A 3Hz – 6.7GHz PSA Series Spectrum Analyzer

In this episode Shahriar repairs an Agilent PSA Series Spectrum Analyzer. The instrument generates many errors during self-alignment and produces no measurements below 3.2GHz. The block diagram of the unit is thoroughly presented and various possible failure points are considered. Based on the observation of the noise floor, the most Continue reading TSP #95 – Teardown, Repair & Analysis of an Agilent E4443A 3Hz – 6.7GHz PSA Series Spectrum Analyzer

TSP Short #16 – Teardown & Repair of an Agilent N1912A P-Series Power Meter

In this episode Shahriar investigates a peculiar problem with an Agilent P-Series Power Meter. While the instruments works during startup, after about 10 minutes the LCD screen begins to flicker and become scrambled. Initial investigation reveals that the issue is not likely with the main motherboard since USB connection to Continue reading TSP Short #16 – Teardown & Repair of an Agilent N1912A P-Series Power Meter