From 4d9d4b5ac3cdab7d7290b63082cf3529656f38c4 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?St=C3=A9phane=20Fillod=2C=20F8CFE?= Date: Sun, 14 Dec 2008 22:02:30 +0000 Subject: [PATCH] blurb about S-meter calibration (from FAQ) git-svn-id: https://hamlib.svn.sourceforge.net/svnroot/hamlib/trunk@2509 7ae35d74-ebe9-4afe-98af-79ac388436b8 --- README.betatester | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/README.betatester b/README.betatester index 217232a74..af162e1d3 100644 --- a/README.betatester +++ b/README.betatester @@ -193,6 +193,27 @@ Tip: traces can be hard to cut and paste sometimes. In that case, And then send my_rig_traces.txt to the hamlib-developer mailing list. +Some models needs S-meter calibration, because the rig only returns raw +measurement. It's easy, it takes only 10mn. Here's how to proceed: + + 1. Fire up the rigctl program released with the Hamlib package, + and pass along options as needed (serial speed, etc.). + 2. Tune to some frequency reporting S0 to the radio S-Meter. + 3. At rigctl prompt, issue "get_level" ('l' in short) of the level RAWSTR. + 4. Write down the S-level read on radio front panel, and the RAWSTR value + retrieved. + 5. Repeat from step 2 with S9 and S9+60dB. Actually the more plots, + the better, otherwise Hamlib does interpolation. + 6. Send the table to the hamlib-developer mailing list and it will be added + in the next release of Hamlib. + +NB: you have to know the S-Meter of radio's is far from being accurate. +For owners with a fully equipped lab, you may want to make the up-mentioned +measurements with a good Signal Generator and a set of calibrated attenuators. +Greg W8WWV has an insightful page about S-Meter: + http://www.seed-solutions.com/gregordy/Amateur%20Radio/Experimentation/SMeterBlues.htm + + Okay folks, test as much as you can, in the weirdest situations if possible. There is a special prize for those who find 'Segmentation fault' and other nasty bugs.