all-ablout-frequency.hashnode.devTelecom Timing Without the Guesswork: Why OCXOs Still Matter for PTP/SyncE & Critical InfrastructureModern networks have quietly moved from “frequency is enough” to time is a product feature. As transport, 5G RAN, and critical infrastructure migrate from legacy TDM toward packet timing, the hard part isn’t only distributing time (PTP) or frequency ...Feb 12·5 min read
all-ablout-frequency.hashnode.devThe Telecom Timing Stack: OCXO, TCXO, and IF SAW Filters ExplainedModern telecom hardware has two “invisible” jobs that make or break real-world performance: Keep frequency and time stable across packet timing (PTP), physical-layer frequency distribution (SyncE), and GNSS-assisted architectures. Keep receivers se...Feb 4·6 min read
all-ablout-frequency.hashnode.devEPSON MC-306 Marked NRND: 32.768 kHz RTC Crystal Design Essentials + A Practical Drop-In Migration Path (FCT-8M)1) What changed: MC-306 is now NRND, so lifecycle becomes a design variable If your product relies on a 32.768 kHz tuning-fork RTC crystal as an always-on time base (deep sleep / always-on domain), a lifecycle change is not just a sourcing issue—it’s...Jan 27·5 min read
all-ablout-frequency.hashnode.devSAW Filters for GNSS, IF, and RF Front Ends: Practical Selection and Design NotesIn modern receivers, surface acoustic wave (SAW) filters often decide whether your front end remains usable in the presence of strong blockers. While reference clocks (TCXO/OCXO) define the phase-noise floor and frequency accuracy of local oscillator...Jan 23·5 min read
all-ablout-frequency.hashnode.devSAW Filters for GNSS, IF & RF Front Ends: The “Spectral Gatekeeper” Your Receiver Depends OnCanonical / source application note (FCom Fuji Crystal):https://www.fujicrystal.com/application_details/saw-filter-gnss-if-rf-front-ends.html Modern receivers live in a brutal reality: the signal you want can be extremely weak, while nearby interfer...Jan 14·6 min read
