hi peter...the way to test the output is to plug in a power meter[most swr metres have this]at the ant output of the meter plug in a 50 ohm dummey load ,then take your reading...
i have the cirkit dig and setup for this raidio ,and it says that the output should be 1watt [500mw erp]thats 70 out of the max...ive not yet tested mine yet ,but wach this space and i WILL let you know wot numbers give for diffrent outputs....but if yours can only give a max of 2 watts then this will be no good to you,...use the swr-power meter insted..pip57