GM-M621 Professional Adjacent Channel Audio & Video Modulator

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Specifications

RF	Adjustable peak deviation: ±50 kHz
Output frequency: 45…870 MHz	Pre-emphasis: 50μs
Nominal output level: ≥55 dBmV	Flatness (40Hz …15kHz): ≤±1.5 dB
Output impedance: 75Ω	Distortion(fm=1kHz;△f=50kHz): ≤1%
A/V RATIO: -10 … -20 dB	S/N ratio: ≥70 dB
Carrier frequency tolerance: ≤5 kHz	*IF section*
Carrier frequency distance tolerance: ≤100 Hz	Video carrier frequency: 38.9(B-G) 45.75(M-N) 38 (D-K)
Spurious in band: ≤-65 dB	Audio carrier frequency:33.4(B-G)41.25(M-N)31.5 (D-K)
Output level adjustment: 0 … -20 dB	Video carrier output level: ≥30dBmV
Side-band Suppression: ≥65 dB	Audio carrier output level: ≥20dBmV
C/N ratio in channel: ≥65 dB	Input/output impedance: 75Ω
*Video*	Input/output return loss: ≥12 dB
Input level: 0.7…1.4 V_PP	*General*
Input impedance: 75Ω	Supply voltage: AC180…250V
Input return loss: ≥20 dB	Consumption: 12 W
Modulation depth: 87.5%	Operating temperature: -10 … ＋55℃
Differential gain: ≤4%	Video,audio connector type: “RCA”
Differential phase: ≤4^o	IF and RF connector type: “F”
Flatness in band: ≤±1.5 dB	Outside dimensions(h×w×d): 483×210×44mm
Cr/L delay: ≤40 ns	Packed weight: 2 kg
Weighted S/N ratio: ≥60 dB
*Audio*
Input level: 0.775V±10 dB
Input impedance (unbalance): 10kΩ

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