How use mdk4 in 5GHz mode

Hi all

Im trying to use the f option of mdk4

Code:

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ATTACK MODE f: Packet Fuzzer  A simple packet fuzzer with multiple packet sources
  and a nice set of modifiers. Be careful!

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I tried that :

Code:

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mdk4 wlan1 -s c -m d -c 36

  A simple packet fuzzer with multiple packet sources
  and a nice set of modifiers. Be careful!
  mdk4 randomly selects the given sources and one or multiple modifiers.
      -s <sources>
        Specify one or more of the following packet sources:
        a - Sniff packets from the air
        b - Create valid beacon frames with random SSIDs and properties
        c - Create CTS frames to broadcast (you can also use this for a CTS DoS)
        p - Create broadcast probe requests
      -m <modifiers>
        Select at least one of the modifiers here:
        n - No modifier, do not modify packets
        b - Set destination address to broadcast
        m - Set source address to broadcast
        s - Shotgun: randomly overwrites a couple of bytes
        t - append random bytes (creates broken tagged parameters in beacons/probes)
        c - Cut packets short, preferably somewhere in headers or tags
        d - Insert random values in Duration and Flags fields
      -c [chan,chan,...,chan[:speed]]
        Enable channel hopping. When -c h is given, mdk4 will hop an all
        14 b/g channels. Channel will be changed every 3 seconds,
        if speed is not specified. Speed value is in milliseconds!
      -p <pps>
        Set speed in packets per second (Default: 250)




Sources and Modifiers must be specified!

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How choose sources and modifiers in a sample commande line ?


Thanks a lot :)