Specifications 48.25-300MHz Adjacent modulator

1.IF SAW filter treatment

2.High performance of residual side band and out of band rejection

      Gecen CATV Headend Equipment 48.25-300MHz Adjacent modulator Model GCM-2000   Product Description   Features: With IF SAW filter treatment, high performance of residual side band and out of band rejection, suitable for adjacent channel system With dual PLLs controlled by CPU, making video and audio carrier frequencies more accurate and stable LED digital channel display Video modulation index; A/V carrier ratio; Audio FM deviation; RF output level are adjustable individually Suitable for 19 standard rack mounting, with rear panel AC outlet for cascade usage Specifications

Item	Unit	Specification	Item	Unit	Specification
Output Frequency Range	MHz	48.25~860	Differential Gain	%	≤3
Output Level MAX	dBuV	113	Differential Phase	.	≤3
Output Level Modulation	dB	20	C/L Delay	nS	≤35
Spurious Rejection	dB	60	Audio FM Deviation	KHz	±50
Video Carrier Accaracy	KHz	±5	Audio in-band Frequency Response	dB	≤1.5
Output Impedance	Ohm	75	A/V Carrier Power Ratio	dB	-10~30
Output Return Loss	dB	14	Audio S/N	dB	≥57
Video Modulation	%	87.5	Power Supply	V.AC	220±10%
Video Frequency Response	dB	≤2.0	Operating Temperation	°C	0~40
Video S/N	dB	50