FCAL(1)

📦
version 3.0.2 · 14 versions
, in ubuntu stonking

💖 FCAL(1) — the WSJT-X manual, but make it cute 💖

okay bestie, gather round, we're doing fcal today and it's giving very nerdy but honestly? iconic. this whole page lives in the WSJT-X Manual, so you already know it's gonna be good.

✨ NAME ✨

fcal — calculates a best-fit straight line for calibration data 🦋

like. it literally fits a line. to your numbers. and it's slaying while doing it.

🌸 SYNOPSIS 🌸

fcal [FILE]

that's it. that's the whole vibe. one optional file. we love a low-maintenance queen 👑

💅 DESCRIPTION 💅

so here's the tea ☕ fcal is one of a whole suite of command line tools designed to aid frequency measurement. and no, they're not just pretty — these tools are aimed at those taking part in the ARRL FMT, though they're also useful for general frequency measurement and calibration. periodt.

they come bundled up inside the WSJT-X package, specifically for use with the FreqCal mode of WSJT-X. so if you're out here doing FreqCal things, this is your girl 🫶

The input FILE is normally the output of the fmtavg(1) tool, after adjusting to remove bad sources.

👀 bestie listen — that "after adjusting to remove bad sources" part is NOT optional flavor text. clean your data first, then feed it in. don't make me say it twice 💀

want the detailed instructions? go read:

that's the FMT User guide and it has all the deep lore 🌈

👑 AUTHOR 👑

Joe Taylor, K1JT.

(just the one name. main character energy fr fr ✨)

🎀 COPYING 🎀

fcal is Copyright © 2001 - 2019 by Joseph H. Taylor, Jr., K1JT, with contributions from additional authors. WSJT-X is Open Source software, licensed under the GNU General Public License (GPLv3).

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

💀 not me being dramatic but this one's important — no warranty, no promises, no take-backs. read the GPL if you want the full receipts.

and that's the whole page bestie!! this lil doc was brought to you by AsciiDoc 3.0.2-devel, dated 06/22/2026 — so jot that down, and go measure some frequencies 💜 🦋 ⭐

📦 where this page comes from