4Receiver blocking

4 Receiver blocking

(1) The receiver blocking requirement is 27 dB above the minimum wanted signal level, and applies at frequency offsets greater than 50 MHz and less than or equal to 1500 MHz from the upper and lower frequency limits of the spectrum licence under which the radiocommunications receiver operates. (2) The receiver blocking requirement for unwanted signals within the -3 dB beamwidth of the receiver antenna and at frequency offsets of greater than 1500 MHz, is expressed as a root mean square field strength at the input of the receiver antenna of: (a) 0.36 V/m in the frequency range 0.03 GHz–12.75 GHz; and (b) 0.1 V/m in the frequency range 12.75 GHz–55 GHz, excluding frequency offsets of less than or equal to 1500 MHz from the upper and lower frequency limit of the spectrum licence under which the radiocommunications receiver operates.

Note: When using the receiver blocking requirement of 27 dB to calculate the maximum tolerable interference level at offsets greater than 50 MHz and less than or equal to 1500 MHz, a reference bandwidth of 50 MHz is to be used. For example, a receiver complying with the notional receiver performance level will be able to tolerate an interference power level of -58 dBm/50 MHz within the frequency offset of 50 MHz–1500 MHz, measured at the input of the receiver.