SCAN2B Scan Doubler System

Video monitors designed to operate from old PC standards such as EGA or CGA have become expensive and difficult to source. They are also not future upgrade compatible.

The main problem is due to the low frequency of their horizontal deflection or scanning system. The C.A. Designs scan doubler SCAN2B reads the original video signals into solid state memory at the original frequency and, almost simultaneously, writes this signal out again at twice the horizontal frequency. The output signal is processed to be made compatible with standard, low cost and easily available monitors used with current PCs.

The SCAN2B module connects directly with a computer terminal either via a 9-way D male connector, or by RGB BNC connectors.

• Video Input
  accepts EGA (default)
  accepts TTL video (8, 16, or 64 colour)
  accepts RGB video. Syncs may be composite on the green channel, separate H & V, or mixed HV
• Video Output
  via 15-way high-density D female socket (VGA type)
• Power Supply
  9 to 12v external PSU on a DC coaxial connector with centre pin positive

The standard units are programmed with default parameters suitable for an EGA input with a typical PC monitor output.

They also have a range of manual adjustments to modify the signal capture and picture position. These adjustments are made with a standard PC keyboard (PS/2 style).

Adjustments made are stored in non-volatile memory and are retained when power is off (default settings can be restored if required).

The SCAN2B only changes the horizontal scan frequency, the vertical frequency is unaffected. If a more flexible solution is required, then the SCAN2F or SCAN2G offer scaling of both the horizontal and vertical resolutions.

Click Here for datasheet.