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  • Model: VS-4A
  • Manufactured by: HRT

4 Port VGA Switch with Stereo Audio and Serial Control


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The Model VS-4A is a versatile and compact 4 input x 1 output VGA & audio switch. It supports PC resolutions to 1600x1200 or HD resolutions to 1080p. The unit allows one monitor to be switched between four video and audio sources. The switched output can be selected via front panel push-button, through RS-232 serial port, or automatically by scanning and detecting active video on the inputs. In 'Auto' mode, the user can also assign priority to any of the inputs, whereby if all video inputs are active, the selected input would have precedence. The switched output can be blanked (with audio muted) or unblanked via the front panel or through the serial port. Optional rackmount brackets are also available.

Techorium's HRT 4 Port VGA Switch with Audio and Serial Control Applications


  • Allows four video & stereo audio input sources to be switched to one output
  • Can be controlled manually by push-button, via Serial port or by detecting active video input

  • Select inputs 1, 2, 3, 4, or blank the output

  • Auto mode automatically scans and selects the input with active video

  • Auto Mode priority can be set for any input or no-priority

  • Switched output can be blanked and un-blanked

  • Stores the last selection and mode in EEPROM

  • In scanning mode inputs are shown for pre-determined periods

Technical Specifications

Video Level 0 to 0.7V p-p on RGB, 0 to 5 V for H and V Sync
Supported Resolution PC from VGA to UXGA (640x480 to 1600x1200) HD from 480p to 1080p
Bandwidth 200 MHz
Audio Inputs PC or Consumer audio (standard line-level)
Power 6V center positive, 300 ma DC power adapter for N. America (-U units include Universal power supply 100~240VAC)

User Guides

Techorium's HRT 4 Port VGA Switch with Audio and Serial Control User GuideVS-4A User Guide

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