diff --git a/doc/calibration_funcref.txt b/doc/calibration_funcref.txt
index f9db0ba..d15a2f0 100644
--- a/doc/calibration_funcref.txt
+++ b/doc/calibration_funcref.txt
@@ -171,12 +171,12 @@ Description:
 
  Whether or not the result of this function actually depends on the <parameter>channel</parameter>
  parameter is
- hardware dependent.  For example, a multiplexed analog input will typically use the same
- calibration for all input channels.  Analog outputs will typically use different calibrations
+ hardware dependent.  For example, the calibration of a multiplexed analog input will typically
+ not depend on the channel, only the range.  Analog outputs will typically use different calibrations
  for each output channel.
 
  Software calibrations are implemented as polynomials (up to third order).  Since the inverse
- of polynomials of order higher than one can't be represented exactly as another polynomial, you
+ of a polynomial of order higher than one can't be represented exactly as another polynomial, you
  may not be able to get converters for the "reverse" direction.  For example, you may be
  able to get a converter for an analog input in the COMEDI_TO_PHYSICAL direction, but not
  in the COMEDI_FROM_PHYSICAL direction.