From 14f113055d094c3069eaa365e3c387015de8b796 Mon Sep 17 00:00:00 2001
From: "W. Trevor King" <wking@tremily.us>
Date: Thu, 27 Jun 2013 16:39:37 -0400
Subject: [PATCH] calibcant/procedure.tex: Discuss 14kHz spike in
 fig:calibcant:vibration

---
 src/calibcant/procedure.tex | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/calibcant/procedure.tex b/src/calibcant/procedure.tex
index a1da8c1..65a4531 100644
--- a/src/calibcant/procedure.tex
+++ b/src/calibcant/procedure.tex
@@ -163,7 +163,11 @@ vibrations are configurable (with \hFconfig,
       (\cref{eq:peak-frequency}).  Only data in the blue region was
       used when computing the best fit.  This is the first vibration
       from the 2013-02-07T08-20-46 calibration, yielding a fitted
-      variance $\avg{V_p(t)^2}=96.90\pm0.99\U{mV$^2$}$.
+      variance $\avg{V_p(t)^2}=96.90\pm0.99\U{mV$^2$}$.  The narrow
+      spike around $14.3\U{kHz}$ is not due to the cantilever's
+      thermal vibration, and rejecting noise like this is the reason
+      we use a frequency-space fit to calculate the thermal deflection
+      variance.
       \label{fig:calibcant:vibration}}
   \end{center}
 \end{figure}
-- 
2.26.2