--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/txlevels/fcom1.README	Mon Jul 17 01:17:38 2017 +0000
@@ -0,0 +1,24 @@
+The name "fcom1" stands for "FreeCalypso hardware, Openmoko-based, version 1",
+and the set of Tx power level calibration profiles named "fcom1" has been
+created empirically by the Mother of FreeCalypso to produce successful Tx level
+calibration runs on our current FCDEV3B boards with our current CMU200 and
+cabling setup.
+
+These fcom1 Tx power level calibration profiles should ONLY be used for
+(re)calibrating FreeCalypso-made hardware, i.e., FCDEV3B boards and potentially
+other closely related FC hardware designs in the future; these profiles are NOT
+expected to be correct for recalibrating Openmoko's own FreeRunners or for
+calibrating other (non-FreeCalypso) Openmoko-derived GSM devices that retain
+the internal antenna and the Murata SWD RF test port used by Openmoko, as
+opposed to the SMA used on our FCDEV3B.
+
+For anyone interested in one of those latter use cases, a different set of
+profiles would need to be created; the Mother is not currently able to create
+those profiles with a good confidence of correctness despite owning several
+Openmoko-made FreeRunners and the appropriate Murata MXHS83QH3000 adapter
+because the insertion loss of the latter adapter is not precisely known.
+Knowing the total insertion loss along the full path from the DUT to the CMU200
+is a prerequisite for determining the correct profiles for Tx power level
+calibration, and when Murata SWD/SWF RF test ports are involved, this cabling
+path includes both the cable from the CMU200 ending in an SMA and the adapter
+from Murata that goes between the SMA and their switch connector.