How do you get an Xbee-PRO to transmit continuously.

I have a product that uses an Xbee-PRO. The product itself requires to be tested for FCC approval as well as CE.

To be able to test the equipment, it must operate continuously for an extended period of time (at least 15min.)

Im thinking that if I loop a code onto the input of the xbee, that this might work but the transmission might be pulsed.

Or I could use the I/O function, set DIO0 as an input and just tie it high.

Would this work, What are your thoughts.
Thanks in advanced.

OK I found out that this wont work. Apparently I need to obtain a special firmware for the device that will allow me to put the device into continuous transmit.