Hi,
I have a question about EMC testing in the EU of a 2.4GHz (ISM band) Short Range Radio (SRD) device, with an internal fixed antenna. (NB: EU, Not FCC)
My understanding is that the device is limited to emitting 10mW EIRP, however, I am seeking clarification on how that is measured in practice if the antenna is integral and internal to the device.
Real antennas have different gains in different directions, whereas a theoretical isotropic antenna's gain is even in all directions.
So, how will my device be assessed for compliance?
Will the test-house measure the maximum forward-gain output power, (which due to the antenna's forward-gain will make it seem like it is outputting a lot more than the isotropic average), or is there some method applied to calculate what the output would have been if it had a theoretical isotropic antenna attached to the transmitter?
If so, should I be making an effort to modify a unit to replace the integral internal antenna with an SMA connector for the duration of the EMC tests, so that the test centre's own "antenna equivalent" load can be connected in place of the normal internal antenna?
Thank you.