Thanks, what is happening is that we have a transceiver, which regularly transmits at 240MHz to the antenna. (and it transmits during the radiated immunity test, because its part of the normal operation) However, when we take it for radiated immunity testing, then at 60MHz (60MHz from Radiated immunity antenna), the transmitter does not work properly at its 240MHz transmit frequency, and this must be due to the 60MHz being transmitted by the radiated immunity test antenna, being picked up by our equipments antenna. What happens is that the hardware detects too low current in the transmitter, and so puts out an "antenna missing" fault, and thence we fail the radiated immunity test.
How can we stop this from happening? ie, how can we stop the 60MHz from screwing up the transmitter such that it somehow cant transmit at its frequency of 240MHz?
This incoming 60MHz is somehow screwing up the transmitters ability to transmit at its 240MHz. -The transmitter has a current monitor and this is recording low current when the 60MHz is incumbent. This causes software to put out "antenna missing" fault....and thence we fail the radiated immunity test.
Its difficult to explain this because there are two antennas here, one is the radiated immunity test antenna (which is sweeping from 30MHz to 1GHz) , and the other is the antenna on the equipment that's undergoing radiated immunity testing.