Broadcasting Smart Agile Modulator

Introduction

E-8700 is equipped with the latest CATV electronic technology, including crystals simultaneous PLL vibration circuit, triple SAW synthesized IF circuit, trace filter, CPU control. E-8700 is high quality, vestigial sideband equipment synthesized with audio and video carriers. E-8700 uses audio and video baseband signals coming from video recorder, video camera, or similar equipment as signal source. Its receiving video input level is 0.5Vp-p~1.5Vp-p. Working parameters and status are displayed by LCD on front panel, such as output channel, output frequency, A/V ratio, video modulation depth, audio deviation, audio carrier, output level, test signal. The parameters are selectable by pressing the buttons on the panel.

Features

l         With complete CPU control, it has self-check monitoring function.

l         Agile output frequency (47~866.250MHz), stepping by 0.25MHz.

l         All the parameters are adjustable through man-machine conversation.

l         IF loop interface.

l         Unique 5-grades trace band pass filter.

Item	Unit	Specifications
RF
Output Frequency	MHz	47~866.25
Max Output Level	dB	115
RF Output Range	dB	20
V/A Ratio	dB	-13~20
Broadband Noise	dB	-65
Frequency Stability	KHz	±3
Output Impedance	Ω	75
Output Rejection Loss	dB	≥16
Video
Input level for 87.5%	Vp-p	1
Differential Gain	%	≤3
Differential Phase	°	≤3
C/L Delay	Nsec	≤35
Frequency Response	dB Max	±0.75
Modulation Range	%	72.5-90
Video IF Output Frequency	MHz	38
Video S/N	dB	≥60
Audio
Input Level	Vp-p	0.4
Input Impedance	Ω	10K
Deviation	dB	±0.5
Pre-emphasis	50Msec	50
General
Power Supply	V	90~250
Fuse	A	20-0.5
Temperature Range	℃	0~40
Dimensions	cm	48.3×27×4.5
Connectors	Video Audio input, IF loop and RF output are all type F.