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int32 __stdcall niWLANG_ChannelNumberToCarrierFrequency80211abgjpn (float64 channelStartingFrequency, float64 channelBandwidth, int32 channelNumber, int32 secondaryFactor, float64 *carrierFrequency);
Calculates the carrier frequency of 802.11a/b/g/j/p/n channels according to sections 16.4.6, 17.4.6, 18.104.22.168, and 20.3.15 of IEEE Standard 802.11-2012.
|channelStartingFrequency||float64||Specifies the starting frequency of the frequency band. This value is expressed in Hz.|
|channelBandwidth||float64||Specifies the channel bandwidth You can choose a 5 MHz, 10 MHz, 20 MHz, or 40 MHz channel. This value is expressed in Hz.|
|channelNumber||int32||Specifies the offset of the center frequency, in increments of 5 MHz, above the starting frequency of the channel.|
Specifies whether the secondary channel is above or below the primary channel when you set the
channelBandwidth parameter to 40 MHz.
The toolkit creates a 40 MHz channel by combining the primary channel and the secondary channel, each with a 20 MHz bandwidth.
The value of -1 indicates that the secondary channel is below the primary channel whereas the value of +1 indicates that the secondary channel is above the primary channel. Valid values are -1 and +1.
|carrierFrequency||float64*||Returns the carrier frequency. This value is expressed in Hz.
The function calculates the carrier frequency using the following equation:
When you set the channelBandwidth parameter to 40 MHz, the channelNumber parameter is the primary channel number. The function calculates the carrier frequency using the following equation:
|status||int32||Returns the status code of this operation. The status code either indicates success or describes an error or warning condition. Examine the status code from each call to the function to determine if an error occurred.
To obtain a text description of the status code, call the niWLANG_GetErrorString function.
The general meaning of the status code is as follows: