GAM-4000B is a high quality agile modulator that designed for primary CATV headend application.  The agility is achieved by high reliability micro-controller which also makes the setting of GAM-4000B very convenient. Operating channel automatically restored after power failure. Both video and audio carriers are PLL synthesized which provides ultimate accuracy and stability.  GAM-4000B is constructed with an RFI proprietary SAW filter that achieves true VSB response and remove harmonics. The superior performance or GAM-4000B makes it the best choice for high density multiple channels CATV headend application.

Features                                                           

         * 54 MHz to 860 MHz Agile Controlled by Advance Micro-processor

         * High Performance SAW Vestigial Sideband Filter; C/L Delay is Corrected

         * Composite IF Loop Through meet requirement of EAS and Scramble System

         * +55 dBmV RF Output Capability by Hybrid Amplifier with Low Distortion Products

         * Both Video and Audio Signal are Synthesized, Meet FCC Stability and Accuracy Reg.

        *  Comply with U.L. Safety Requirement

 

RF OUTPUT SECTION
Output Frequency	55 MHz to 860 MHz Agile (CATV STD,HRC and IRC)
Output Level	+60dbmV max. @75£[
Output Control Range	20 dB
Spurious Output	< -60 dB
Frequency Stability	¡Ó10 KHz, ¡Ó5 KHz in aeronautical band.
VIDEO SECTION
Input Type	Composite Baseband Video
Input Level Range	0.5 Vp-p to 1.5 Vp-p @ 87.5%
Input Impedance	75£[, unbalance
Frequency Response	¡Ó1.5 dB max.
Differential Gain	¡Ó3%
Differential Phase	¡Ó3 deg.
C/L Delay	Less Than 50nS
Signal to Noise Ratio	¡Ù60 dB  weighted
Visual Carrier C/N	>68dB @ 4 MHz BW
AUDIO SECTION
Input Level	0.5Vp-p for 25 kHz peak deviation
Input Impedance	600£[unbalanced
Pre-emphasis	75£gS, De-featable by switch
Frequency Response	0.75 dB
GENERAL SECTION
Input Voltage	110V AC 60Hz
Input Power	20 Watt

                            

All specifications are subject to change without notice