AVE VECA User Manual

VECA

Video Enhancer Compensator Amplifier

The VECA is an inline device to compensate for video degradation due to long cables.
There are two controls on the VECA, one for Enhancing and the other for Gain.

Installation

Connect the VECA inline with the video signal you wish to enhance. Adjust the gain so
the over all video level at the monitoring end is returned to 1 V P-P. Then turn on the
Enhance switch and adjust clockwise until the picture is improved to your satisfaction.

Gain

This control amplifies or attenuates the overall gain or video level of the signal. This can
recover attenuated signals due to long cable runs up to X2 video gain. It can also
attenuate the video gain if the video signal is too high or you turn up enhance to
maximum. The gain circuitry can operate with video input levels up to 2.5 V P-P which
will give a maximum output level of 4 V P-P. However the Enhance Switch must be in
the “Off” position with input video levels over 1.5 V P-P.

Enhance

This control improves the video picture to get high quality by rectifying the picture
contour. Move the control clockwise to increase the high frequency component of the
video signal to enhance the picture. Turning the control all the way counter clockwise
will attenuate the high frequency portion of the video for a soft look.

Enhance On / Off

If this switch is in the “Off” position the enhancement circuitry is turned off and the
adjustment control makes no difference. In this position the user can adjust the proper
overall video level. In the “On” position the enhancement is enabled and one can adjust
for optimum enhancement. Note that enhance circuitry only operates with video input
levels of 1 – 1.5V P-P, if higher input is used the Enhance switch should be in the “Off”
position or video distortion will occur.

Default Factory Adjustment

The factory presets the Gain at unity or X1 which is no amplification or attenuation. The
Enhancement adjustment is nominal and unity or X1 enhancement. The Enhance
switch is in the “Off” position.

Power

The VECA uses a standard 2.1mm x 5.5 mm DC Coax Plug for power. 12VDC @
100ma is required.