Ross VEA-7007A, Руководство пользователя

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Overview
The RossGear VEA-7007A Video Equalizing Amplifier provides remarkable value and excellent
performance in a basic equalizing amplifier for video and AES audio. It is ideally suited for
distribution where the source signal is of good quality and does not require clamping correction.
The VEA-7007A precisely and easily equalizes your choice of three popular coaxial cable types:
Belden 8281, 1694, or 1505. This 3-cable type selection ability is achieved to a level of accuracy never
before obtained in a single amplifier. All other amplifiers on the market are designed primarily for one
type of cable and usually achieve mediocre results with other cable types, or require complex and
time-consuming adjustment procedures.
During installation, the setting of a single adjustment is all that is needed to obtain unparalleled
equalization accuracy, thanks to very accurate factory-calibration. The need to use elaborate frequency
response measuring equipment in the field is eliminated. Surface Mount Technology has been used in
the manufacture of this card to further eliminate the need for field adjustments.
The VEA-7007A eliminates normal distribution problems such as cable high-frequency loss and
ground loop hum. Because the amplifier is DC coupled, clamping is not required, thus minimizing
signal distortion. This enables it to deliver eight precision copies of the original signal, whether video
or AES audio.
Temperature drift effects are almost non-existent due to the use of the latest in analog ASIC’s
combined with meticulous product engineering.
The VEA-7007A card is designed for use in the RossGear 7200 series video, and 7850 series A/V
distribution frames. The power to each card is individually fused to prevent failure of any one card
from affecting the rest of the cards in the frame. RossGear analog (and digital) cards are also designed
to fit into distribution frames of some other manufacturers for installation flexibility.
Ross Video Limited is pleased to offer the flexibility of selectable three-cable type precision
equalization within a single card slot. The VEA-7007A fills a unique role within the full line of
RossGear video distribution products, engineered to satisfy the highest quality broadcast standards and
the most demanding requirements of your facility.
Functional Block Diagram
Figure 1. Simplified Block Diagram of VEA-7007A Functions
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Introduction VEA-7007A User Manual (Iss. 01)