550MHz Professional Agile Modulator

Introduction

E-990C is one practical and economical modulator manufactured by our company. Equipped with double frequency conversion LNB, CPU control technology, and easy to change RF output frequency by 0.25MHz stepping frequency, it is the first choice emergency standby equipment for medium and small sized TV system.

Features

l         Double digital PLL, CPU control

l         Output RF modulation frequency is adjustable in the range of 48~550MHz.

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

l         Audio carrier 4.5/5.5/6.0/6.5MHz is selectable 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	45~550
Max Output Level	dBµV	115
RF Output Range	dB	13~20
V/A Ratio	dB	20
Broadband Noise	dB	60
Frequency Stability	KHz	±5
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	±1.0
Video S/N	dB	60
Audio
Input Level	Vp-p	0.4
Input Impedance	Ω	600
Distortion Factor	%	0.6
V/A Spacing	MHz	4.5, 5.5, 6.0, 6.5
Deviation	dB	±0.5
Pre-emphasis	usec	50
General
Power Supply	V/A	180~250
Fuse	A	-20~0.5