Inday SVDA-1 Manual

INDAY
Multimedia Accessories
For Customer Service:
INDAY
1818 NE 140th
Portland, Oregon 97230
Phone: 503-255-1451
Fax: 50-251-0586
Email: support@inday.com
INDAY
Multimedia Accessories
SVDA-1
S-Video
Distribution
Amplifier

Overview And Uses

The SVDA-1 is a 4 output S-Video distribution
amplifier designed for the Broadcast, Video Pro-
duction and Multimedia environments. Its most
common application will be to distribute the output
of a VCR or other S-Video source to Switchers,
Routers, Monitors and other VCR's while main-
taining picture quality.
Often times the output of a VCR or Computer
Based Editing system has only One S-Video con-
nector. This can be quite limiting if you need to
make multiple dubs of a finished project or you
need to monitor the quality of the signal BEFORE
it passes through another VCR or piece of process-
ing equipment. Figure 1 shows a typical applica-
tion that overcomes these problems.
S-Video is a much cleaner way to distribute Video
signals. Its component nature reduces the interfer-
ence and distortion that is often seen in NTSC
Video. The longer you can keep a Video signal in
its component format the cleaner the end product
will look. Although the SVDA-1 cannot make
"Poor" video look any better, it will not add any
noise or distortion to it.
Figure 1

Installation

The SVDA-1 comes shipped ready to use. The
proper Wall Transformer is supplied. Simply con-
nect your source to the SVDA-1 input and connect
outputs as needed. Under most circumstances no
gain adjustment should be required. The unit is
shipped with gain set for unity. A 1Vp-p input will
produce 4-1Vp-p outputs. However if your Input
level is low or the outputs are driving long (>200
ft.) cables, the Y and C gain may need to be ad-
justed. See the next section for alignment proce-
dures.
Figure 2

Y/C Delay Notes

Y/C Delay is the leading or lagging of the Chroma
signal in time, referenced to the Luminance signal.
The SVDA-1 has no provision to correct this error.
Delays less then 100ns usually do not cause prob-
lems. If there is a gross delay error, a Delay Line
must be inserted in either the Y or the C signal
path. The delay line can be just a piece of Coax
cable or a Delay Box with switches. The Delay
Box should be capable of at least 300ns. If Coax is
used remember that 1ns equals 0.648-ft. (7.778") of
cable. For example, a Chroma delay of 281ns can
be corrected by inserting 182 ft. of coax in the Y
signal path.