The post details the application of a polyphase channelizer for processing Bluetooth LE signals, focusing on frequency offset correction and its mathematical derivation.
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This post details the optimization of complex heterodyne and decimation filters in DSP, showcasing the efficiency of polyphase channelizers and the role of IFFT in reducing computational load.
Complex heterodynes are essential in DSP for effectively shifting signals to baseband, overcoming challenges posed by real local oscillators through the use of complex oscillators.
A detailed account of diagnosing and repairing a malfunctioning Stanford Research Systems DG535 digital delay generator, emphasizing design flaws and troubleshooting techniques.
This post details the implementation of decimation and anti-aliasing FIR filters, emphasizing polyphase decomposition and hardware optimization in digital signal processing.
The blog post details the repair process of a Stanford Research Systems SR620 universal time interval counter, including replacing the power switch and the backup lithium battery. The author discusses the device's specifications, ...
The blog post discusses the author's experience with the Isotemp OCXO107-10 oscillator, detailing its specifications, historical context, and performance characteristics. The author shares insights gathered from online research an...
The blog post details the author's experience repairing an HP 5370A time interval counter, a vintage device known for its precision. After purchasing the unit, the author encountered issues with smoke and a foul smell upon powerin...
This blog post details the repair process of a Tektronix TDS220 oscilloscope, focusing on common issues such as leaking capacitors and LCD screen corruption. The author describes the steps taken to open the device, replace power s...
The blog post discusses how to adjust the brightness and contrast of Tektronix TDS 500/600/700 oscilloscopes. The author shares their experience with a dim CRT and provides instructions on how to find and adjust the display tuning...
The blog post discusses the Tektronix TDS 684B oscilloscope, its features, and how it works. It delves into the internals of the oscilloscope, the acquisition board, and the noise issue. It also explains the high specifications of...
The text is a detailed overview of the Rohde & Schwarz AMIQ Modulation Generator, including its functionality, teardown, and analog circuits. The author describes the process of acquiring the device, restoring it, and delves into ...
The text is a review and teardown of the DSLogic U3Pro16 logic analyzer. It discusses the features, hardware, software, and comparison with Saleae Logic Pro 16. It also includes a detailed analysis of the input circuit, impact on ...
The author discusses the process of upgrading the RAM in an HP Laptop 17, which was purchased for $330. The laptop was bought for a project that required a lot of Spice simulations, and the author found the laptop to be better tha...
0Symbolic Reference and Hardware Models in Python
2024-12-27 •
The text discusses the traditional hardware design and verification flow in FPGA or ASIC development, including different models used for testing and verification. It introduces the concept of symbolic models in Python for hardwar...
0Making Screenshots of Test Equipment Old and New
2024-11-29 •
The blog post describes the procedures used to create screenshots of test equipment, including oscilloscopes and spectrum analyzers, using various interfaces such as USB, Ethernet, GPIB, and parallel printer ports. The author also...
The blog post discusses the issue of the Symmetricom SyncServer S200 refusing to lock to GPS due to the GPS Week Number Rollover problem. The author presents a custom hardware solution using an interposer to fix the problem, provi...
The blog post details the process of setting up a Symmetricom SyncServer S200 Network Time Protocol Server, including important steps like installing missing BNC connectors, setting up the server from scratch, and configuring DNS ...
0Tesla’s FSD - a Useless Technology Demo
2024-05-20 •
The author shares their experience testing Tesla's Full Self-Driving (FSD) system, highlighting multiple mistakes made during short test rides. Despite the hype, the author concludes that FSD is unreliable and not worth the invest...
0Zephyr Ravenna Control Board Replacement
2024-05-12 •
The blog post details the author's experience replacing the control board of a Zephyr Ravenna kitchen hood due to erratic behavior. The author encountered confusing information and incorrect advice from a Zephyr technician, but su...
0Tektronix TDS 684B Oscilloscope Button Swap
2024-04-17 •
The blog post details the process of swapping a rotary encoder on a Tektronix TDS 684B oscilloscope to fix erratic behavior in one of the knobs. The author initially tried swapping the front panels with a TDS 540 oscilloscope but ...
0Guide Technology GT300 Frequency Standard Teardown
2024-04-06 •
The blog post discusses the teardown of a GT300 frequency standard from Guide Technology Inc., focusing on the internal components such as the OCXO, voltage regulator, and output stage. The author explores the circuitry, calibrati...
0Symmetricom 58532A GPS Antenna Supply Voltage Mod
2024-03-23 •
The blog post discusses the Symmetricom 58532A GPS antenna, focusing on its voltage regulation, PCB variants, and modifications to make it compatible with 12V GPS receivers. The author details the process of opening up the antenna...
0HP 8656A Signal Generator Schematics
2024-02-22 •
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