--- a/src/wifi/model/yans-wifi-phy.cc	Sat May 25 21:36:10 2013 +0200
+++ b/src/wifi/model/yans-wifi-phy.cc	Mon May 27 13:45:39 2013 +0200
@@ -109,12 +109,12 @@
                    MakePointerAccessor (&YansWifiPhy::m_state),
                    MakePointerChecker<WifiPhyStateHelper> ())
     .AddAttribute ("ChannelSwitchDelay",
-                   "Delay between two short frames transmitted on different frequencies. NOTE: Unused now.",
+                   "Delay between two short frames transmitted on different frequencies.",
                    TimeValue (MicroSeconds (250)),
                    MakeTimeAccessor (&YansWifiPhy::m_channelSwitchDelay),
                    MakeTimeChecker ())
     .AddAttribute ("ChannelNumber",
-                   "Channel center frequency = Channel starting frequency + 5 MHz * (nch - 1)",
+                   "Channel center frequency = Channel starting frequency + 5 MHz * nch",
                    UintegerValue (1),
                    MakeUintegerAccessor (&YansWifiPhy::SetChannelNumber,
                                          &YansWifiPhy::GetChannelNumber),

--- a/src/wifi/model/yans-wifi-phy.h	Sat May 25 21:36:10 2013 +0200
+++ b/src/wifi/model/yans-wifi-phy.h	Mon May 27 13:45:39 2013 +0200
@@ -71,7 +71,7 @@
   /**
    * \brief Set channel number.
    *
-   * Channel center frequency = Channel starting frequency + 5 MHz * (nch - 1)
+   * Channel center frequency = Channel starting frequency + 5 MHz * nch
    *
    * where Starting channel frequency is standard-dependent, see SetStandard()
    * as defined in IEEE 802.11-2007 17.3.8.3.2.