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      A/V Matrix Switcher (MMS-AV404)
1. Description
This device enables to route 4 audio/video input signals to 4 audio/video output.
Enable to control input/output by front control key. A rear panel RS-232C control port provides remote control function.
Memory back-up function helps to memorize the last status while it is turned off, PGM/CALL function enables to save and operate A/V status.
Monitoring ports are available to monitor output mode when input modes are selected,
The front display panel enables easy monitoring of input and output modes.

2. Panel Drawing

3. Specification
▷Audio Part

 Input/Output Level  +14 dBm Maximum
 Input/Output Impedance  Stereo Unbalanced 600ohm , RCA.
 S/N Ratio  Less than 70dB
 Cross talk  Less than 80dB
 Bandwidth  100MHz -3 dB
 Frequency Response  ±0.1dB (20Hz ~ 20kHz)

▷Video Part

 Input/Output Impedance  NTSC Composite Video BNC 1Vp-p 75ohm
 S/N Ratio  Less than 65dB
 Cross talk  Less than 60dB
 Bandwidth  100MHz -3 dB
 Frequency Response  ±0.1dB (100kHz ~ 5MHz)
 Differential Phase  1˚
 Differential Gain  1%

▷Control Part

 CPU  89C55 WD
 Control terminal  RS-232C

▷Case & Power Part

 Rated Power input  AC 85 ~ 240V 50 ~ 60Hz
 Operating temperature  0℃ ~ 40℃
 Power consumption  Less than 20Watt
 Type  19” Rack Type
 Dimensions  483(W) * 44.5(H) * 300(D) mm