NOTE 1 For derivation, see Appendix 1 to Annex 2. – Appendix 1 to 2 Derivation of maximum interfering field strength density interfered with by services other than broadcasting Parameter Symbol Value Unit Frequency 108 MHz f Bandwidth 429 103 Hz B Receiver antenna gain dBi Gr –0.85 Feeder loss 1 dB L 5 dB NF NF Receiver intrinsic power dBm Nr –112.7 Median value of man-made noise power as 20.5 dB Fam described in § 5 of Recommendation ITU-R P.372-10 External noise power to the receiver input power dBm N0 –99.0 Total receiver noise power dBm Nt –98.8 Effective antenna aperture dB m2 Aeff –3.0 • Total noise field strength 21.0 dB(µV/m) Et Maximum interfering field strength (in 429 kHz) 11.0 dB(µV/m) Ei Maximum interfering field strength density 4.6 dB(µV/(m 100 kHz)) Eis • Receiver intrinsic noise power = 10 × log (k + 30 (dBm) Nr T B) + NF Median value of man-made noise power as described in § 5 of Recommendation ITU-R P.372-9 Fam = c d × log (dB) – f (c = 76.8 and =27.7 for the city area) d External noise power to the receiver input power 10 × log (k + 30 + (dBm) No = T B) L Fam+ Gcor –
NOTE 1 – For derivation, see Appendix 1 to Annex 2. Appendix 1 to 2 Derivation of maximum interfering field strength density interfered with by services other than broadcasting Parameter Symbol Value Unit Frequency f 108 MHz Bandwidth B 429 103 Hz Receiver antenna gain Gr –0.85 dBi Feeder loss L 1 dB NF NF 5 dB Receiver intrinsic power Nr –112.7 dBm Median value of man-made noise power as described in § 5 of Recommendation ITU-R P.372-10 Fam 20.5 dB External noise power to the receiver input power N0 –99.0 dBm Total receiver noise power Nt –98.8 dBm Effective antenna aperture Aeff –3.0 dB • m2 Total noise field strength Et 21.0 dB(µV/m) Maximum interfering field strength (in 429 kHz) Ei 11.0 dB(µV/m) Maximum interfering field strength density Eis 4.6 dB(µV/(m • 100 kHz)) Receiver intrinsic noise power Nr = 10 × log (k T B) + NF + 30 (dBm) Median value of man-made noise power as described in § 5 of Recommendation ITU-R P.372-9 Fam = c – d × log f (dB) (c = 76.8 and d =27.7 for the city area) External noise power to the receiver input power No = 10 × log (k T B) – L + 30 + Fam+ Gcor (dBm)