I tested a Walkera TX5811 Video transmitter that suppose to be 25 mW with a second hand bought ImmersionRC power meter and the power output showed about 71 mW and varied a bit between different channels. So is it common for Video transmitters to have a much higher power output than advertised, even the products from a well known manufacturer as Walkera? Or can it be that my power meter is malfunctioning and showing the wrong value? I asked this question in another forum as well to have a higher chance of getting an answer. I would appreciate some input and answers, thanks in advance.