Crown FM250G, Руководство пользователя

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Rev A
Getting Acquainted 1—7
1.3 Transmitter/Exciter Specifications
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Frequency Range 87-108 MHz
RF Power Output (VSWR 1.5:1 or better)
50-250 watts, adjustable
RF Output Impedance 50
Ω
Audio Input Impedance 50 k
Ω
bridging, balanced, or 600
Ω
Audio Input Level Selectable for -10 dBm to +10 dBm for
75 kHz deviation at 400 Hz
Pre-emphasis Selectable for 25, 50, or 75 µsec; or Flat
Audio Response Conforms to 75 µsec pre-emphasis curve
as follows
Complete transmitter ±0.30 dB (50 Hz-10 kHz)
±1.0 dB (10 kHz-15 kHz)
Exciter only ±0.25 dB (50 Hz-15 kHz
Distortion (THD + Noise)
Complete transmitter Less than 0.7% (at 15 kHz)
Exciter only Less than 0.3% (50 Hz-15 kHz)
Stereo Separation
Complete transmitter Better than -40 dB (50 Hz-15 kHz)
Exciter only Better than -40 dB (50 Hz-15 kHz)
Crosstalk Main into sub, better than -40 dB
Sub into main, better than -40 dB
Stereo Pilot 19 kHz ±2 Hz, 9% modulation
Subcarrier Suppression 50 dB below ±75 kHz deviation
FM S/N Ratio (FM noise)
Complete transmitter Better than -60 dB
Exciter only Better than -70 dB
RF Bandwidth ±120 kHz, better than -35 dB
±240 kHz, better than -45 dB
RF Spurious Products Better than -70 dB