A1-6 Minimum ship e.i.r.p. vs. elevation angle Minimum ship e.i.r.p. with 6 W Ship elevation angle Ship antenna gain transmitter degrees dBi dBW 0 3 10.8 10 3 10.8 20 2.5 10.3 30 1 8.8 40 0 7.8 50 6.3 −1.5 60 4.8 −3 70 3.8 −4 80 −10 −2.2 90 −20 −12.2 3.9 Transmitter requirements for VDES ship stations 3.9.1 Transmitter power Table A1-7 defines the requirements for the VDES ship station transmitters. A1-7 Transmitter parameters mobile station Transmitter parameters Requirements Condition Frequency error 3 ppm normal Transmit power Transmit average power should be at least Conducted 1 watt and not exceed 25 watts as declared by the manufacturer. ±1.5 dB normal, +2/−6 dB extreme Maximum adjacent power 0 dBc < ±12.5 kHz Δfc levels for 25 kHz channel dBc ±12.5 kHz < < ±25 kHz −25 Δfc dBc ±25 kHz < < ±75 kHz −60 Δfc Maximum adjacent power 0 dBc < ±25 kHz Δfc levels for 50 kHz channel dBc ±25 kHz < < ±50 kHz −25 Δfc dBc ±50 kHz< < ±100 kHz −60 Δfc Maximum adjacent levels 0 dBc < ±50 kHz Δfc for 100 kHz channel dBc ±50 kHz < < ±100 kHz −25 Δfc dBc ±100 kHz < < ±150 kHz −60 Δfc Spurious emissions dBm 9 kHz to 1 GHz −36 dBm 1 GHz to 4 GHz −30 3.10 Shutdown procedure An automatic transmitter hardware shutdown procedure and indication should be provided in case a transmitter continues to transmit for more than 2 s. This shutdown procedure should be independent of software control.
A1-6 Minimum ship e.i.r.p. vs. elevation angle Ship elevation angle Ship antenna gain Minimum ship e.i.r.p. with 6 W transmitter degrees dBi dBW 0 3 10.8 10 3 10.8 20 2.5 10.3 30 1 8.8 40 0 7.8 50 −1.5 6.3 60 −3 4.8 70 −4 3.8 80 −10 −2.2 90 −20 −12.2 3.9 Transmitter requirements for VDES ship stations 3.9.1 Transmitter power Table A1-7 defines the requirements for the VDES ship station transmitters. A1-7 Transmitter parameters mobile station Transmitter parameters Requirements Condition Frequency error 3 ppm normal Transmit power Transmit average power should be at least 1 watt and not exceed 25 watts as declared by the manufacturer. ±1.5 dB normal, +2/−6 dB extreme Conducted Maximum adjacent power levels for 25 kHz channel 0 dBc −25 dBc −60 dBc Δfc < ±12.5 kHz ±12.5 kHz < Δfc < ±25 kHz ±25 kHz < Δfc < ±75 kHz Maximum adjacent power levels for 50 kHz channel 0 dBc −25 dBc −60 dBc Δfc < ±25 kHz ±25 kHz < Δfc < ±50 kHz ±50 kHz< Δfc < ±100 kHz Maximum adjacent levels for 100 kHz channel 0 dBc −25 dBc −60 dBc Δfc < ±50 kHz ±50 kHz < Δfc < ±100 kHz ±100 kHz < Δfc < ±150 kHz Spurious emissions −36 dBm −30 dBm 9 kHz to 1 GHz 1 GHz to 4 GHz 3.10 Shutdown procedure An automatic transmitter hardware shutdown procedure and indication should be provided in case a transmitter continues to transmit for more than 2 s. This shutdown procedure should be independent of software control.
R12-SG05-RP-1007!!MSW-E.docx