M7E Hecto USB and External Power Supply

New to this so sorry for the basic question.

I have been able to connect to and develop against the M7E Hecto via USB and things are going well, however i think the USB is not providing enough power to the board as the signal starts to degrade after a while which is to be expected due to heat etc.

So my question is.
I would like to know if i can connect an external power supply and use the onboard USB connection connected to my PC at the same time? If so how would i go about connecting the external power supply.

Thnaks,

In the hookup guide there is a picture of the jumpers (http://docs.sparkfun.com/SparkFun_Simultaneous_RFID_Reader_M7E/assets/img/Simultaneous_RFID_Reader_M7E-Jumpers.jpg).

You can select to take the power from the VUSB, the VCC or VIN pin on the side. By default all can provide. from the schematics :