47~860MHz Professional Agile Modulator

Introduction

E-990H is one high-frequency modulator launched by our company according to constant increase of cable TV programs. Equipped with PHILIPS high performance modulating IC, and combined with CPU control, it adjusts video modulation depth, audio deviation, A/V ratio and RF output frequency in the way of man-machine conversation. It is the first choice equipment for medium sized TV system to increase programs and for emergency standby use.

Features

l         Double digital PLL, CPU control

l         Output RF modulating frequency is adjustable in the range of 550~860MHz.

l         Preset standard channels enable to select any channel at random.

l         Audio carrier 4.5/5.5/6.0/6.5MHz is adjustable on panel.

l         Every channel carrier can be trimmed by 0.25MHz.

l         Automatic storage, memory after power off

Item	Unit	Specifications
RF
Output Frequency	MHz	47~860
Max Output Level	dBµV	115
RF Output Range	dB	13~20
V/A Ratio	dB	20
Broadband Noise	dB	60
Frequency Stability	KHz	±3
Output Impedance	Ω	75
Output Return Loss	dB	16
Video Mod Depth	%	87.5~90
Video
Input Level for 87.5%	Vp-p	1
Input Impedance	Ω	75
Differential Gain	%	5
Differential Phase	°	5
C/L Delay	ns	≤45
Frequency Response	dB	±0.75
Video S/N	dB	60
Audio
Input Level	Vp-p	0.4
Input Impedance	Ω	600
Distortion Factor	%	0.6
V/A Spacing	MHz	6.5
Deviation	dB	±0.5
Pre-emphasis	usec	50
General
Power Supply	V/A	180~250
Fuse	A	1~0.5
Temperature Range	℃	0~40
Dimensions	cm	48.3×19.5×4.5