TNP #19 – Teardown & Repair of a Keysight U1253B 50,000 Count True RMS OLED Handheld Multimeter

In this episode Shahriar takes a look a Keysight U1253B multimeter with a notorious problem of failed OLED screens. The OLED would degrade and stop working on some of these units. Since the original OLED model is almost impossible to find, replacement OLED would require a protocol translation layer. The replacement module uses an FPGA to achieve this.

The teardown of the unit as well as the repaired units are shown. The performance of the instrument is verified using a universal source and an 8.5-digit multimeter.

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TNP #18 – Repair & Analysis of a W-Band (75-110GHz) WR-10 12dBm Power Amplifier Module

In this episode Shahriar takes a look at a non-functional W-Band (75-110GHz) power amplifier module with WR-10 waveguide ports. A quick inspection reveals a broken DC connector which can be easily repaired. Since a W-Band VNA or source is not available, the amplifier’s excess noise is instead measured using an external mixer and a Keysight MXA-B. The noise power spectral density shows the the amplifier is likely functional with the expected noise and gain.

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TSP #208 – Tektronix 2-Series 4-Channel 2.5GS/s 500MHz MSO Review, Teardown & Experiments

Is this episode Shahriar takes a look at the brand new 2-Series oscilloscope from Tektronix:

https://www.tek.com/en/products/oscilloscopes/nextgentek

This review is organized as follows:

00:00 – Introductions & overview.
01:23 – Instrument interfaces, specifications & design.
04:00 – Detailed teardown, instrument architecture & PCB design.
12:46 – Input impedance considerations, 50-Ohm passthrough experiment, FFT usage.
16:56 – Triggering on infrequent events, runt & pulse detection, advanced triggering usage.
21:25 – Detection analog waveform anomalies, high-resolution mode, acquisition control.
23:26 – Bus decoding capabilities, packet table viewing, UART decoding.
25:56 – AFG functionality, measuring filter responses, arbitrary & noise generation.
32:22 – Concluding remarks.

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TSP #207 – Teardown & Detailed Analysis of Qualcomm’s 60GHz Multi-Panel Phased Array WiGig System

In this episode Shahriar takes a close look at a wireless-Ethernet product based on Qualcomm’s 60GHz WiGig chipset. The episode is inspired by the upcoming in-person RFIC & IMS IEEE conferences held starting June 19th, 2022 in Denver, Colorado, USA:

IEEE Radio Frequency Integrated Circuits Symposium:
https://rfic-ieee.org/

IEEE International Microwave Symposium:
https://ims-ieee.org/ims2022

The entire WiGig system architecture is analyzed end-to-end. The phased array module is presented using x-ray images and individual RFIC’s are examined under microscope.

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TNP #17 – Teardown, Upgrade & Experiments with Sencore LC103 Rezolver Capacitor & Inductor Analyzer

In this episode Shahriar takes a look at the very rare Sencore LC103 Rezolver Capacitor & Inductor Analyzer. The instrument receives a firmware upgrade (EPROM) as well a thorough cleaning. A brief teardown and main blocks of the unit are also presented. The basic functions of the instrument are verified and checked against the Keysight E4980A. The power supply and leakage capability of the instrument are also verified.

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