The information provided on this website is provided for reference purposes only. It is my personal development blog, and is not intended to act as an educational or advisory tool…
That error means the Python environment running ezRA cannot find the rtlsdr module. The package you need is called pyrtlsdr, even though Python imports it as rtlsdr. On your Windows…
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Andy, First, I’m just curious why your focus on the 1‑second PPS output. Nearly every GPS module provides a PPS signal, so unless you specifically need a programmable frequency synthesizer,…
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The Z means “Zulu time”, which is the military/aviation/radio term for UTC (Coordinated Universal Time). So: 1200Z = 12:00 UTC The letter Z comes from the time-zone designator for zero…
You can use the 1 PPS as the long-term GPS timing reference, while allowing the FE-5650A rubidium oscillator to provide the very stable short-term frequency. Conceptually: The key point is…
Hi Andy, I wanted to pass along an operational caution about the FE‑5650A that may not be obvious from normal bench testing. This particular rubidium unit dissipates a very large…
A PLL’s LOCK indication is often mistaken for proof of true synchronization, but in reality it only confirms that the loop is operating within its internal lock window. A rubidium…
Yes — rubidium locking and a PLL are closely related ideas, although the atomic-lock servo is not necessarily a conventional electronic PLL in the narrow sense. Think of it like…
In your FE-5650A rubidium frequency standard, being “locked” means the electronics have successfully tuned the oscillator so that its frequency is being controlled by the rubidium atoms, rather than merely…
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