Electronics etc…

Introduction The TDS7104 Common Failures Make an Image of the Hard Drive CR2032 Backup Battery Replacement and Display Brightness Do NOT Remove the Front Panel Scope Disassembly A Failed Attempt at Switching over to an SSD Reinstalling from Scratch: Windo…

Introduction A Late Nineties PC Assessing the Damage Installing a Video Card and Keyboard Locked CPU Fan Replace the BIOS Backup Battery Replacing the Motherboard Capacitors Replacing the Spinning Disk Hard Drive with a CompactFlash Drive Digital Configur…

Introduction A Galois Field Introduction by Example Base Galois Fields A Real World Example of a Base Galois Field GF(2) Extended Galois Fields Extended Galois Field Addition Extended Galois Field Multiplication A Field Defining Irreducible Polynomial A P…

Or better: the fun and the unsatisfying way… Introduction How AMIQ License Keys Work An Easter Egg Reverse Engineering the License Check A Funny Disabled Master Key Using Codex Conclusion Introduction One of the guilty pleasures of playing with old test e…

In the end, it comes down to fixing two early 2000s PCs… Introduction The Agilent 54831 Inside the PC System of the 54831 Unit A: Agilent 54831M First Suspect: the IBM TravelStar HD Getting the PC to Boot Unit B: Agilent 54831B A CompactFlash Adapter with…

Introduction A Bluetooth LE Trace as Example Input Complex Heterodyne Derivation of Post-Decimation Offset Correction Simplifying for the Half-Bin Offset Case The Odd Case of an Odd Number of Channels Reducing the Number of Phase Adjustment Values Conclus…

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Introduction Some Common DSP Notations Sampling with 1 ADC Creates a Real Signal Heterodyning the Signal to Baseband the Wrong Way Complex Heterodyne to the Rescue Filtering Away the Old Negative Image Decimation Final Block Diagram Conclusion Afterthough…

Introduction The Decimation and Anti-Aliasing FIR Filter Combo Naive Hardware Implementation Reduce number of calculations - Move decimator before multiplier Polyphase decomposition of the original filter The Noble Identity for Decimation Reusing Common H…

Introduction The Stanford Research Systems DG535 Who Uses a Pulse Delay Generator?