TECHNICAL SPECIFICATIONS FOR ARDF TRANSMITTERS
144 MHz CLASSIC
Equipment: CONTEST2007
RF power: 3W PEP
Antenna: crossed dipoles 3m above ground level
TX intervals: TX 1...5 (codes MOE-MO5): 1 min transmitting, 4 mins space.
finish beacon (code MO): continuous operation
Transmitting interval ends with a 2 sec dash.
Modulation: AM 80%, keying speed: 50 PARIS
Frequency: TX 1...5 (codes MOE-MO5): 144,500 MHz
finish beacon (code MO): 144,900 MHz
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3,5 MHz CLASSIC
Equipment: CONTEST2007
RF power: 3W
Antenna: 8m vertical + 8 m single radial counterpoise
TX intervals: TX 1...5 (codes MOE-MO5): 1 min transmitting, 4 mins space.
finish beacon (code MO): continuous operation
Transmitting interval ends with a 2 sec dash.
Modulation: A1A, keying speed: 50 PARIS
Frequency: TX 1...5 (codes MOE-MO5): 3,560 MHz
finish beacon (code MO): 3,600 MHz
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3,5 MHz SPRINT EVENT
Equipment: CONTEST2007
RF power: 1W
Antenna: 8m vertical + 8 m single radial counterpoise
TX intervals: TX 1...5,1F...5F (codes MOE-MO5): 12s transmitting, 48s space.
spectators control (code S): continuous operation
finish beacon (code MO): continuous operation
Transmitting interval ends with a 2 sec dash.
Modulation: A1A
Frequency: TX 1...5 (codes MOE-MO5): 3,520 MHz keying speed: 50 PARIS
spectators control (code S): 3,540 MHz keying speed: 70 PARIS
TX 1F...5F (codes MOE-MO5): 3,560 MHz keying speed: 70 PARIS
finish beacon (code MO): 3,600 MHz keying speed: 50 PARIS
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3,5 MHz FOXORING
Equipment: MICROFOX HF
RF power: TX 1...5,1F...5F (codes MOE-MO5): 10mW
finish beacon (code MO): 1W
TX intervals: All transmitters operate continuously.
Modulation: A1A, keying speed 50 PARIS (TX 1...5, beacon), 70 PARIS (TX 1F...5F)
Antenna: TX 1...5,1F...5F (codes MOE-MO5): approx. 30cm vertical
finish beacon (code MO): 8m vertical + 8 m single radial counterpoise
Frequency: TX 1,1F,2,2F (codes MOE,MOI): 3,520 MHz
TX 3,3F,4,4F (codes MOS,MOH): 3,540 MHz
TX 5,5F (code MO5) 3,560 MHz
finish beacon (code MO): 3,600 MHz
The RF field strength of transmitters 1...5 and 1F...5F is adjusted so that:
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the transmitter is clearly audible at its nominal position marked on the map AND at the distance of 30m from its real position
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the transmitter is NOT audible at the distance of 250m from its real position.
