CO/VSDA - automatic change over
for audio and serial digital video (SDI)

The CO/VSDA is a change over realized in a 1/3 unit case (1RU 19") , makes a commutation on the audio and video signals of emergency if the principal signals come to miss. 
The frontal panel of the CO/VSDA has the followings commands:

Operational mode key (Automatic, Semiautomatic and Manual)

  • In the AUTO Mode , the Change Over automatically exchanges from the principal video to that substitutive after the period of delay planned by the Time switcher. 
    The exchange on the principal signal immediately happens after the restoration of the same. 

  • In SEMIAUTOMATIC mode, the initial exchange happens automatically while the restoration of the principal signal happens pressing the ENABLE key.

  • In MANUAL mode, the exchanges happens manually (key A or B). The commutation can also be effected through a remote control.

The TIME switcher selects the interval time that will spend before that the automatic commutation happens on the emergency video.
The CO/VSDA is provided with a bypass circuit that, in absence of power or in case of damage, allows to transit the signals in the A input.


  • Audio: analog or serial digital
  • Video: serial digital
  • Mode: automatic, semi-automatic, manual
  • Switching delay: selectable (0.25-2.5 sec)
  • Automatic by-pass when the power goes off

In accordance with constant improvement policy of products, El.Man (Elettronica Mangione) reserves the right to modify without notice and at any time, features and prices of its own apparatus.