Updated disable comment.

Change-Id: I8d76b1dd482cdeea21295289a47d4e738fdb9d4e
diff --git a/aos/common/controls/control_loop-tmpl.h b/aos/common/controls/control_loop-tmpl.h
index ba26c68..142da9f 100644
--- a/aos/common/controls/control_loop-tmpl.h
+++ b/aos/common/controls/control_loop-tmpl.h
@@ -122,9 +122,9 @@
 
   ::aos::controls::output_check_received.FetchLatest();
   // True if we're enabled but the motors aren't working.
-  // The 100ms is the result of disabling the robot while it's putting out a lot
-  // of power and looking at the time delay between the last PWM pulse and the
-  // battery voltage coming back up.
+  // The 100ms is the result of using an oscilliscope to look at the PWM signal
+  // and output of a talon, and timing the delay between the last pulse and the
+  // talon turning off.
   const bool motors_off =
       !::aos::controls::output_check_received.get() ||
       !::aos::controls::output_check_received.IsNewerThanMS(100);