STM32

WIP Programmable signal generator with GNSS-checked timing The idea I want to build a programmable function generator for my lab. The basic architecture is: STM32H743ZI → high-speed DAC → analog output with a u-blox GNSS receiver providing a long-term timing reference. The first target is relatively simple: generate a clean sine wave up to at least 10 MHz. The exact output stage and reconstruction filter still need to be designed. I chose the STM32H743ZI for a very practical reason: I already have a NUCLEO-H743ZI board sitting on my bench. ...

≈ 7.3 ns Receiver-to-receiver jitter (NEO-M8T vs ZED-F9T), with the measurement system noise floor removed in quadrature Overview A follow-up to the VLF recorder work — a parallel project at the Institute characterizing PPS (pulse-per-second) timing accuracy across two GNSS receivers, both running in survey-in mode: a u-blox NEO-M8T and a ZED-F9T. The question was straightforward: How precisely can the PPS outputs of two GNSS receivers be compared, and how much of the measured jitter actually comes from the measurement system itself? ...